Grex Helpers Conference

Item 104: Grex System Problems

Entered by i on Sat Dec 22 18:13:12 2001:

185 new of 293 responses total.


#109 of 293 by gelinas on Thu Jan 24 04:53:11 2002:

Yes.


#110 of 293 by tsty on Fri Jan 25 09:58:31 2002:

staff: question: is the protocol gelinas used on um's pine applicable
to the pine that grex uses? 


#111 of 293 by senna on Fri Jan 25 09:59:21 2002:

Last night and this morning, Grex has been randomly killing my connection
after short (five-ten minutes) periods of time.  The rest of my internet
connection works fine while this is happening, but I get nothing here.  Any
ideas?


#112 of 293 by gelinas on Fri Jan 25 13:19:16 2002:

try a traceroute from your starting point to grex; look for dropped packets.


#113 of 293 by jp2 on Fri Jan 25 14:49:59 2002:

This response has been erased.



#114 of 293 by davel on Fri Jan 25 15:15:55 2002:

Re 112 re 111: This has happened to me intermittently, but way too often,
lately.  But I was dialed in, and my starting point was just the term server,
I think.


#115 of 293 by russ on Sat Jan 26 18:56:17 2002:

Amidst a download of a pile of e-mail, I got this on my tty:

Sat Jan 26 13:52:03
This terminal has been idle 15 minutes. If it remains idle
for 5 more minutes it will be logged out by the system.

Can't Grex recognize that a terminal running something like sz
is NOT idle and should NOT have unwanted data dumped on it,
let alone be cut off?


#116 of 293 by tsty on Sat Jan 26 21:51:11 2002:

i thought that had been fixed when yu were in short  pants?


#117 of 293 by davel on Sat Jan 26 22:30:15 2002:

I'm rather puzzled as to how you saw the message, if it was in the middle of
a file transfer.


#118 of 293 by russ on Sun Jan 27 19:59:33 2002:

The "down until approximately 1 PM" notice on Grex was still playing
at 1:42 PM.  If backups are going to take longer or be started later,
it would be much friendlier of staff to correct the estimate to be
closer to reality.


#119 of 293 by gull on Sun Jan 27 20:28:47 2002:

The problem may be that if it's not known that it'll take longer before 
the backups are started, changing the estimate would require modifying 
a filesystem being backed up, which is generally considered a Bad Idea.


#120 of 293 by aruba on Sun Jan 27 22:39:54 2002:

Thanks, Scott, for doing that backup!


#121 of 293 by drew on Sun Jan 27 23:55:48 2002:

Re #119: Not necessarily. It's possible to put both multiple filesystems and
multiple OSes on a single machine, and even on a single hard drive! A small
special purpose OS/filesystem could be dedicated to showing the estimate and
running the backup software.


#122 of 293 by russ on Mon Jan 28 00:21:41 2002:

Re #117:  It was actually just a bit after downloading over 1/2 megabyte
of e-mail and conference text.  Regardless, it should not have occurred.
Even if the idle-killer checks the tty to see if it's in raw mode and
ignores it, one could be logged out immediately after finishing a
download if the timing is exactly wrong.


#123 of 293 by polytarp on Mon Jan 28 00:42:47 2002:

Pl-e--a---s----e-----! -I-- ---n----e-----ed- --h---e----l-----p!-
B--r---o----k-----en- --t---h----i-----s -i--s---!----


#124 of 293 by mvpel on Tue Jan 29 01:14:45 2002:

Grex does not appear to be running the Network Time Protocol daemon, and its
clock is coming up on a minute fast.


#125 of 293 by tsty on Tue Jan 29 15:02:58 2002:

threr might be an Xnix version as well, but     nistime32   (googls search)
is an excellent windoze time synchronizer, fwiw. even works
on xp!


#126 of 293 by mvpel on Wed Jan 30 07:53:33 2002:

Re: 110 - Back when I first deployed Pine at UM, I used the IMAP protocol.
I doubt that anything has changed since then.  If you set your mailbox to
{mailserver.name.whatever}INBOX, Pine will attempt to use IMAP to connect to
it.


#127 of 293 by keesan on Thu Jan 31 22:43:55 2002:

Thanks to whoever fixed the modems (if anyone did) so that I was able to
download 43 packets with kermit instead of crashing after packet 12,
at normal speed.  Are the newer faster modems installed now?


#128 of 293 by tsty on Fri Feb 1 09:55:17 2002:

mvpel, whaqt i need to do is point pine to MY CHOICE of inbox
files (into which i save special emails tha require pine). 
  
as shown above, i hard-coded the INBOX path but still get that
sily error about " context   ']' "
  
i wo nOT wnat pine to handle everything. mail is JustGreat (tm).


#129 of 293 by jep on Fri Feb 1 14:59:17 2002:

Backtalk is down right now.


#130 of 293 by mvpel on Fri Feb 1 17:15:30 2002:

I'm pretty sure you can just specify the file pathname instead of INBOX.


#131 of 293 by janc on Fri Feb 1 21:58:58 2002:

Personally, I prefer mutt to pine when I have to send mail with attachments.


#132 of 293 by tsty on Sat Feb 2 22:27:27 2002:

re 130  ... omit the filename? the 'directions' dont indicate
path-only as i read them. 
,


#133 of 293 by twill on Tue Feb 5 23:50:58 2002:

Hi, I'm Twill!


#134 of 293 by bdh3 on Wed Feb 6 07:32:19 2002:

yer mother.


#135 of 293 by gull on Wed Feb 6 15:00:43 2002:

Backtalk just stopped accepting my username and password.  It keeps spitting
the authorization dialog back at me.


#136 of 293 by vidar on Wed Feb 6 17:03:49 2002:

It did that to me too.


#137 of 293 by gull on Wed Feb 6 17:37:28 2002:

Seems to be working now.


#138 of 293 by rcurl on Wed Feb 6 19:42:33 2002:

Is there any way to protect picospan against denial-of-service  attacks,
such as mounted by twill and bdh3?


#139 of 293 by jp2 on Wed Feb 6 20:02:33 2002:

This response has been erased.



#140 of 293 by rcurl on Wed Feb 6 20:54:06 2002:

Free expression is fine, but one or a few postings of a response is
usually sufficient, and the effect of these denial-of-service attacks is
to cause inconvenience for other users, which may in fact cause an
obstacle, especially to new and less experienced users, and drive them
away from the system. 



#141 of 293 by oval on Wed Feb 6 20:58:08 2002:

don't leeron's posts have the same effect? :D


#142 of 293 by gull on Wed Feb 6 21:03:09 2002:

Twill's posts weren't exactly a denial-of-service attack, but the 
program that generated them could easily be used to create one.


#143 of 293 by jp2 on Wed Feb 6 21:12:56 2002:

This response has been erased.



#144 of 293 by rcurl on Wed Feb 6 21:18:39 2002:

I was prevented from reading new meaningful responses in reasonable
rapidity due to the necessity of having to react to hundreds of
items to which the meaningless drivel was attached. I used fixseen,
but new or inexperienced users may not know this, and it may also
have skipped a response that I would have liked to have read. Doing
this was an intentional creation of an obstacle to the convenient
use of the system. It is disrespectful to all users. 


#145 of 293 by jep on Wed Feb 6 21:32:48 2002:

I agree with Rane.  The system is much less usable after a mass posting 
such as this.  There's no way to deal with it which isn't worse than 
the problem, though.

What would be nice is a "fixseen <user> in which all items would 
be "fixed" if the last response in the item was from that user.  Or 
maybe even:

   fixseen -n <number> user

in which the item would be "fixed" if there was a response from the 
user in the last <number> responses.

But it would probably be hard to implement this, cause a big drain on 
the system, and wouldn't really solve the problem.  I don't think there 
is a way to solve it.


#146 of 293 by oval on Wed Feb 6 21:45:44 2002:

yea my finger *really* hurts bad from having to press <RETURN> so many goddamn
times. took less time than it does to read some peoples' posting here. it twas
annoying, but giving it this much attention is annoying too.


#147 of 293 by jp2 on Wed Feb 6 21:50:20 2002:

This response has been erased.



#148 of 293 by flem on Wed Feb 6 22:44:49 2002:

(what oval said)


#149 of 293 by remmers on Wed Feb 6 23:23:39 2002:

(what flem said)


#150 of 293 by keesan on Thu Feb 7 00:46:22 2002:

I figure it wasted about 10 minutes total of my time to have to keep hitting
the enter key and then wait 5 sec to get to the next unwanted item, per item.


#151 of 293 by gull on Thu Feb 7 01:43:16 2002:

Couldn't you just 'twit filter' the offender?


#152 of 293 by jhudson on Thu Feb 7 03:54:02 2002:

<g>

Remember: security = 1 / (1.072 * convenience)


#153 of 293 by russ on Thu Feb 7 06:06:12 2002:

twill/polytarp's actions were a crapflood attack, a type of DoS attack.
(I used to do the same thing as a counter-crapflood against the "last
item" crapfloods on M-Net, and oddly enough, some of the people saying
it's not a DoS attack here/now said it was there/then....)

Re #146:  Your connection must be really fast, and you must have a lot
of time to spend waiting for the next item to come up.  For some people
the extra time can be a large fraction of what they have available.
Those people are effectively denied service.


#154 of 293 by jmsaul on Thu Feb 7 13:42:02 2002:

I think what you did was, and what they did was.  I'm at least consistent.


#155 of 293 by tpryan on Thu Feb 7 14:17:49 2002:

        A solution is Loss of Personality.  Not just splatting an 
account, but taking the account, locking the password, making the
account only readable to staff/root, redirecting mail to dev/null.
        Does not allow account to be re-created.  Offender cannot
use old account files easily in new account, mail does not bounce,
it disappears.


#156 of 293 by aruba on Thu Feb 7 14:30:23 2002:

So they just create a new account.


#157 of 293 by slynne on Thu Feb 7 16:48:58 2002:

So tpryan, if someone did that to you would it mean that you would lose 
your personality? I like to keep my personality offline.


#158 of 293 by happyboy on Thu Feb 7 17:01:52 2002:

...in a shoebox with some potpourri and special mementos?


#159 of 293 by oval on Thu Feb 7 17:16:01 2002:

#157 -- i feel so decieved!!!


#160 of 293 by jazz on Thu Feb 7 17:45:46 2002:

        (on a side note, it's pretty easy to write a shell script to undo the
damage caused by someone flooding a large conference with responses; 
regenerating the picospan information is a different story)


#161 of 293 by slynne on Thu Feb 7 17:47:37 2002:

resp:158 You looked in my special shoebox didnt you!!!!! 


#162 of 293 by happyboy on Thu Feb 7 18:20:48 2002:

oops.


#163 of 293 by pgreen on Fri Feb 8 01:33:07 2002:

#!/usr/bin/expect -f
set timeout -1;

set name twill
set host cyberspace.org
set password aqq1#y

proc login {phost user pass} {
        spawn ssh $phost -l $user
        expect "password:"
        send "$pass\n"
        return $spawn_id
}

set spawn_id [login $host $name $password];
expect "$ "
send "bbs\n"
set item
while {$item <= 146} {
      expect "Ok: "
      send "r $item\n"
      send "
                             "
      send "r\n"
      expect ">"
      send "Hi, I'm Twill!\n"
      send ".\n"
      incr item
}


#164 of 293 by morwen on Fri Feb 8 02:41:45 2002:

resp:139 I don't mind free expression.  Express yourself all you want, 
just express yourself where I don't have to look if I don't want to, 
thanks.


#165 of 293 by jp2 on Fri Feb 8 03:11:40 2002:

This response has been erased.



#166 of 293 by janc on Fri Feb 8 03:25:29 2002:

Is that an expect script?  Seems like massive technological overkill.  This
isn't a task requiring intelligence.  How about this:

  Open some kind of text editor window on your computer.  Type

     Hi, I'm Twill!
     .
     Hi, I'm Twill!
     .
     Hi, I'm Twill!
     .
     Hi, I'm Twill!
     .

  Copy those eight lines into your cut/paste buffer, including the newlines
  at the end of each.

  Telnet to Grex, and enter the bbs.  Type

     set noedalways
     read all nor forceresponse

  Hit the paste button repeatedly.  Each click will probably post the message
  to four items.  Shouldn't take more than a few minutes to do the whole
  conference.  The whole job should take fewer keystrokes than typing the
  expect script.


#167 of 293 by pgreen on Fri Feb 8 03:36:39 2002:

Yeah, but that would have required me to gain knowledge of the commands shown
above. While it is certainly more efficient and quick to execute, neither of
those were included in my goals. Also, I use SSH!


#168 of 293 by gull on Fri Feb 8 03:49:39 2002:

Besides, you know the sysadmin code.  "If you have to do it more than 
twice, automate it."


#169 of 293 by jep on Fri Feb 8 14:08:28 2002:

For the last couple of days, the response box in Backtalk has been 
using robot characters.  I don't know what the font is, but it's a 60's 
computer font looking type of character.  The comma doesn't descend 
below the line and looks like a miniature "L" on it's side...

I thought it was my computer, but realized this morning it's happening 
for both my home and work computers, so it's probably not a change I 
made.

I'd guess this is part of the upgrade to 1.1.11, and that it's not 
intentional.  Please fix it!  Oh, my eyes...



#170 of 293 by gull on Fri Feb 8 14:51:13 2002:

Hmm...the text entry boxes used to be Courier on my system.  Now they 
appear to be Lucidia Console.  Interesting...I had no idea that font 
could be controlled by anything but browser settings.  Lucidia Console 
isn't any worse looking then Courier, really, but it's an optional 
Microsoft font and other systems may substitute one that isn't so 
pleasant.  Courier is less of a problem since pretty much every system 
will have it.


#171 of 293 by jazz on Fri Feb 8 16:30:09 2002:

        CSS, baby, yo.


#172 of 293 by remmers on Fri Feb 8 18:33:57 2002:

Yep.  The source of backtalk pages now has a <STYLE> tag with
contents:  TEXTAREA {font-family: monospace;}


#173 of 293 by jep on Fri Feb 8 19:13:04 2002:

Is there any way to configure my browser to make it give me a more 
reasonable choice for the font?


#174 of 293 by jazz on Fri Feb 8 19:40:16 2002:

        Most browsers have a setting to override a document's specified fonts
with whatever you have set;  whether, and how, this works, depends on the
browser.


#175 of 293 by janc on Fri Feb 8 22:38:41 2002:

Interesting.  I discovered that there are now a lot of browsers that default
to using a proportional font in TEXTAREA boxes.  (Mac versions of IE, for
example).  This has really obnoxious effects, because responses are
*displayed* in a proportional font, but the input wrapping is based on a
proportional font.  Really icky.

So I used a style sheet to force TEXTAREAs to use a monospaced font.  It sets
the font to "monospace" rather than any monospaced fant in particular because
I was figuring that that would be whatever monospaced font is prefered by the
browser.  Obviously Some browsers are doing something different.  I shouldn't
be surprised.

This is easy to change to something different.  I'm open to advice what
should be used.  Courier?


#176 of 293 by pgreen on Sat Feb 9 00:46:06 2002:

Wingdings.


#177 of 293 by other on Sat Feb 9 02:45:19 2002:

I never noticed a difference (mac/NS4.7).

I use monaco-9pt. as my monospace font, and all the plain text on my 
backtalk pages is displayed in it.

There is a setting in most browsers' options to determine what font and 
size the browser uses for monospace and proportional defaults.  You may 
have other options, depending on your browser.


#178 of 293 by jep on Sat Feb 9 05:54:40 2002:

Courier would be vastly better than what I'm getting now.

I'm using IE 5.5 both at home and work.  If there's something simple I 
can do to set up my browser's posting-box font to be something better, 
I'd be happy to do it if someone lets me know what can be done.  What 
I'm getting now is hard to live with.


#179 of 293 by scott on Sat Feb 9 14:21:22 2002:

Jep, I don't know the exact menus for IE, but look for "appearance" or "font"
settings.  There should be settings for regular and monospaced fonts.


#180 of 293 by jep on Sat Feb 9 14:42:00 2002:

Aha.  Okay.  Here's how to do it in IE:

Tools-->Internet Options-->General-->Accessibility
Select "Ignore font styles specified on Web pages

(Why would this be under Accessibility???)

Now to see if the cure is worse than the disease...


#181 of 293 by jep on Sat Feb 9 14:42:45 2002:

Nope, that cures the problem and I haven't seen anything I lost by 
changing the setting.


#182 of 293 by scott on Sat Feb 9 15:18:50 2002:

It would under accessibility because people with vision problems would want
to set a really large font, overriding Web site settings.


#183 of 293 by keesan on Sat Feb 9 18:27:28 2002:

Another cure for the problem, if you don't want to dial in or telnet to grex,
is to use a non-graphical browser which uses screen fonts.  Like lynx.


#184 of 293 by remmers on Sat Feb 9 19:05:04 2002:

...One cost being that you lose mouse support.  Whatever floats your
boat, I guess...


#185 of 293 by keesan on Sat Feb 9 20:20:18 2002:

You don't need a mouse to use the conferences, but lynx for DOS does have
mouse support (optional).  


#186 of 293 by wh on Sun Feb 10 16:54:30 2002:

As everyone knows who is on Grex now, it is running <low voice>
rrrreallllly ssslllooooooowwwwww. In addition I received an error
message "illegal instruction:core dumped" while trying to send mail
in Pine.


#187 of 293 by other on Sun Feb 10 17:00:02 2002:

telnet session.  yup, realllly slow:

Respond or pass?
ld.so: swap space exhausted for mmap data of /usr/lib/libc.so.1.9.1
Pipe interrupt?

Respond or pass?

<...later...>

Respond or pass?
ld.so: swap space exhausted for map heap of /dev/zero
Pipe interrupt?

Respond or pass?

<...later...>

Respond or pass?
Can't execute "more"!
Pipe interrupt?

Respond or pass?
Can't execute "more"!
Pipe interrupt?

Respond or pass? !uptime
 11:52am  up 13 days, 22:04,  20 users,  load average: 69.45, 79.94, 76.27


What is up with those swap errors?


#188 of 293 by scott on Sun Feb 10 17:10:21 2002:

People trying to compile big things which we don't allow on Grex.


#189 of 293 by gelinas on Sun Feb 10 17:17:51 2002:

Which is not allowed: the big compiles, or the things themselves?


#190 of 293 by scott on Sun Feb 10 22:26:18 2002:

The things themselves, so the perps try to bring over their own versions in
hope of getting around the "crippled" Grex versions.  Except that the Grex
versions are not actually crippled, it's the network side that's blocked.


#191 of 293 by gelinas on Mon Feb 11 00:18:57 2002:

OK.  I knew that there were some things not allowed, and properly blocked ;)
but your comments opened the possibility that large compiles, themselves, were
unwelcome.  (I've never written a really large program, so I don't really know
what troubles they would cause other users.)


#192 of 293 by jhudson on Mon Feb 11 19:38:37 2002:

The larger a single file, the larger the symbol table must be
to compile it.  Breaking the project into many files that are
careful about using static whenever possible would greatly
reduce the compilation load.


#193 of 293 by ea on Mon Feb 11 21:03:35 2002:

Earlier today I was having trouble logging in with backtalk.  Telnet 
worked fine ... It seems to be fixed now.


#194 of 293 by russ on Fri Feb 15 22:59:01 2002:

Dialing in tonight I got queue-droppings before I could log in.
Only one level deep, but that's just *wrong*.


#195 of 293 by keesan on Wed Feb 20 17:43:31 2002:

Has anyone else been getting incessant chat requests from smart007
and if so can this account be cancelled?  (I will put this login
on my don't acceptlist now).


#196 of 293 by glenda on Wed Feb 20 20:11:48 2002:

Accounts are not cancelled on Grex.  It does no good with an open system. 
Another account can just be taken out and we are running out of usable UIDs.


#197 of 293 by cmcgee on Wed Feb 20 21:00:37 2002:

I can't imagine Grex cancelling an account because of annoying behavior!
None of us would be left except the last-standing staff member.


#198 of 293 by rcurl on Wed Feb 20 22:29:15 2002:

I don't see that there should even be a problem with smart007, since
you can block anyone from chat requests. 


#199 of 293 by keesan on Wed Feb 20 23:35:46 2002:

I did that, but first I had to waste time dealing with a chat request every
3 second for about 20 minutes while in themiddle of another chat.


#200 of 293 by jp2 on Thu Feb 21 01:17:59 2002:

This response has been erased.



#201 of 293 by other on Thu Feb 21 05:30:47 2002:

It takes less than half a minute to add someone to your .nowrite file, 
and even less if you write a simple shell script to do it.
 


#202 of 293 by rcurl on Thu Feb 21 05:53:55 2002:

You would not have had to waste 20 minutes if you had excused yourself
from that chat and taken care of the problem. 


#203 of 293 by mcnally on Thu Feb 21 06:48:24 2002:

  She would not have to have done anything if an obnoxious user hadn't
  accosted her.  keesan is not the villain here..


#204 of 293 by oval on Thu Feb 21 06:51:42 2002:

but she _is_ the whiner here.


#205 of 293 by other on Thu Feb 21 07:18:18 2002:

To put this in absolutist perspective, the effort keesan put into 
complaining about this abuser is far beyond what would have been required 
for her to eliminate the problem he represented to her.


#206 of 293 by glenda on Thu Feb 21 12:43:30 2002:

Sindi, did you tell the person that you did not want to chat right now?  If
you did and s/he persisted than complaining is appropriate.  If you did not,
how is the person supposed to know?  Granted the requests should have stopped
after 2-4, but maybe the person is clueless to how it all works.


#207 of 293 by jp2 on Thu Feb 21 15:41:22 2002:

This response has been erased.



#208 of 293 by brighn on Thu Feb 21 15:49:38 2002:

#205> Yes, but it wouldn't have gotten her nearly the attention.
#204> Hear, hear.


#209 of 293 by keesan on Thu Feb 21 16:43:26 2002:

Is there some way to send a telegram while I am chatting with someone else?
The people I chat with often have trouble understanding English and this
particular one would have been offended if I tried to hang up to do so, or
change my plan, so I just kept hitting Ctl-L every time the chat request
scrambled the screen (every few seconds).  (It took about 20 minutes to say
goodbye after that, he wanted to chat for just another 30 min, but I finally
promised to be online Friday at noon - it is hard to find someone to chat with
you in your own language.)  After changing my write permissions, I sent a
short and polite letter to smart007 explaining what had happened and
suggesting that they request a chat only once, and first do a who to find out
what the other person is doing at the moment.  Did not hear back.


#210 of 293 by oval on Thu Feb 21 16:53:54 2002:

suspend the process. 


#211 of 293 by slynne on Thu Feb 21 17:56:37 2002:

Cant you shell out of write with a !?


#212 of 293 by tpryan on Thu Feb 21 18:11:24 2002:

        I keep chats and writes off until I am done with other
things and are ready to recieve them.


#213 of 293 by keesan on Thu Feb 21 20:13:46 2002:

I have had a few chatters get offended when they tried to reach me and I was
in Pine (cannot get chat requests while in Pine).  One clever guy sent me an
email that he was online.
Can you shell out of chat?


#214 of 293 by mdw on Thu Feb 21 21:35:57 2002:

^Z works with talk.  use "fg" to get back to it.
        !man tcsh
for more info on fg, ^Z, and all that.
chat/write support ! escapes, and I think it's possible to suspend them too.


#215 of 293 by keesan on Thu Feb 21 21:46:16 2002:

Thanks, I will tell the chatter to wait 30 sec next time while I shell.


#216 of 293 by katie on Fri Feb 22 01:01:56 2002:

For the record, I still think the person who invented 'talkdaemon'
should be lined up and shot.


#217 of 293 by jazz on Fri Feb 22 04:37:08 2002:

        Mesg's author, presumably, earned his pardon.


#218 of 293 by tsty on Fri Feb 22 15:28:55 2002:

   a    !mesg N    and then a quick   restart of your    chat <loginid>
will stop the problem. that also presumes yu haven't sent a tel to
your annoyer already.


#219 of 293 by keesan on Fri Feb 22 17:07:31 2002:

Thanks, that sounds much easier than exiting chat and running the change
program.  I did not know you could even shell from chat.


#220 of 293 by jp2 on Fri Feb 22 17:59:25 2002:

This response has been erased.



#221 of 293 by jhudson on Sat Feb 23 02:06:57 2002:

Because only one kernel syscall can run at a time.


#222 of 293 by remmers on Sat Feb 23 15:44:15 2002:

Not true.  If *that* were so, lots of other things would be slow,
and a system call that didn't return would bring everything to a
stop.


#223 of 293 by mdw on Sun Feb 24 04:00:27 2002:

Actually, only one kernel syscall can run at a time (at least under
sunos), but that's a moot point, since long-running system calls
typically block on some event and allow other things, including other
system calls, to use the CPU.  None of this is particularly relevant to
why ps et al are slow -- the real reason is because sunos doesn't offer
the accellerators that later systems have to access kernel structures.
In SunOS, everything is done using "nlist" and "/dev/kmem"; on many more
recent systems, there is a kernel ksyms data structure and things in
/dev and /procfs that access the kernel ksyms data, and even more
usefully, stuff in the kernel that provides access to the process table,
per-user kernel data, and other stuff without the bother of going
through kmem.  This is just one of the things that contributes to kernel
bloat in linux, solaris, etc.


#224 of 293 by keesan on Mon Feb 25 15:38:28 2002:

Valerie kindly pointed out that there is no need to set up your own twit
filter, you can type 'ignore username'.   I presume this holds for an
individual session.  Is there some way to make it permanent for use when
someone has trashed all the items in a conference?  I. e., can I put the line
in some file that runs whenever I use bbs?


#225 of 293 by rcurl on Mon Feb 25 15:46:55 2002:

The spam rate here seems to be increasing. Is there a central spam filter
for incoming mail, for either source or recipient addresses (like
Undisclosed-Recipient@cyberspace.org)?


#226 of 293 by keesan on Mon Feb 25 16:01:57 2002:

Ask Marcus, who is working on it.  I forward my spams to him at UCE, with full
headers.


#227 of 293 by keesan on Mon Feb 25 16:07:57 2002:

I am unable to connect with lynx to google, altavista, or alltheweb.
It says it is trying to connect to 123.45.567.78 (sample numbers) and nothing
happens for 60 sec.  I Ctl-C to exit.  


#228 of 293 by mdw on Mon Feb 25 21:45:21 2002:

        !finger uce
for more information on spam filters on grex.  We purposefully don't
publish detailed information on the spam logic on grex, because we
don't want to educate spammers on how to evade them.


#229 of 293 by krj on Mon Feb 25 22:08:41 2002:

resp:127 ::  another lynx trouble report, from party:
 
stephenl: Does anyone know what is wrong with lynx?
stephenl: It won't connect to any websites.  It always goes back to the
          localhost.
 
I wiggled lynx a bit -- I usually don't run it -- and it does seem
to fail to connect to anything.


#230 of 293 by mdw on Mon Feb 25 23:32:46 2002:

Apparently gryps bit the dust.  Someone is supposed to go reboot it
tonight.


#231 of 293 by tnblaze on Wed Feb 27 10:38:45 2002:

this is a tast since im new at this and i dont know how to work it yet lol


#232 of 293 by davel on Wed Feb 27 13:36:12 2002:

Try joining the test conference ("j test"), if that's what you need to do.


#233 of 293 by tsty on Wed Feb 27 17:22:05 2002:

re 224 ..   ignore username   works in party .. does it also
work in the real world? this would be interesting.


#234 of 293 by davel on Thu Feb 28 02:22:00 2002:

Heh.  TS, is picospan really realer than party?  In the real world, ignoring
people sometimes works, sometimes not ...

<goes off & tries it>
As it stands, it does *not* hold for your current session, only for future
sessions; but it tells you how to make it take effect for the current session.
Someone wrote something to add twit-filter lines to your .cfonce (your bbs
startup script).  Running it again for someone else will append another set
of lines, I think - so the net effect will be to replace any previous twit
filter.  (You can, however, list all the users you want to ignore on one
command.)

Valerie or whoever wrote it, nice job.
<goes off & looks> Yep, Valerie.


#235 of 293 by tsty on Fri Mar 1 18:03:03 2002:

for teh more adventurous (and before applying taliban tactics) there
is this missive i have unabashedly plagiarized from 'a player to
be named later .. if at all.'
  
"Unfortunately, the answer to "kick him off" is yes, but it wouldn't
help.  All he would need to do then is run newuser & create himself
another account.  So, in order to fight that, we'd have to have
somebody always watching, and pulling the plug as necessary.
It's a big brother cat-and-mouse game.  No joy in that.

Actually, this is a behavior/socialiazation problem.  There are
other methods of dealing with such problems that are far more
effective.  The trick is to pull "orthogonal" thinking on him.
You can't just react to him (that plays right into his mindset)
and while sometimes it's possible to ignore him, that's not
always effective.  Things that might work include applying logic
to what he says (most crude sayings are truely hilarious when
looked at the right way), or applying inventive logic to him.
There are some tricky knife edges to watch: he should never know
for sure if you are making fun of him or are being deadly
serious, and whatever you say should be at least mildly
entertaining to others.  If you do it right, however,
you might find either (a) he undergoes a personality phase
shift and becomes an interesting person, or (b) he gets bored
and goes elsewhere to get his jolly's.

Please do send mail to staff if this doesn't suffice or if things get worse."
  
i believe the plagiarizm is character-for-character .. at least i hope so.
  



#236 of 293 by krj on Fri Mar 1 23:19:24 2002:

Looks like user tikcloak is launching a new connection to Grex every
five minutes.  If unchecked, this will be a problem in a couple of hours.
 
The regularity of the logins say to me this is an automatic process.
 
grex.cyberspace.org% finger tikcloak
Login: tikcloak                         Name: TikCloak
Directory: /a/t/i/tikcloak              Shell: /usr/local/bin/bash
On since Fri Mar  1 17:30 (EST) on ttyp3 from 203.162.56.202
On since Fri Mar  1 17:45 (EST) on ttyp5 from 203.162.56.202
On since Fri Mar  1 16:55 (EST) on ttyp7 from 203.162.56.202
On since Fri Mar  1 17:00 (EST) on ttyp8 from 203.162.56.202
On since Fri Mar  1 17:05 (EST) on ttypb from 203.162.56.202
On since Fri Mar  1 17:20 (EST) on ttypd from 203.162.56.202
On since Fri Mar  1 17:50 (EST) on ttype from 203.162.56.202
On since Fri Mar  1 18:05 (EST) on ttypf from 203.162.56.202
On since Fri Mar  1 18:00 (EST) on ttyq2 from 203.162.56.202
On since Fri Mar  1 17:25 (EST) on ttyq3 from 203.162.56.202
On since Fri Mar  1 18:10 (EST) on ttyq7 from 203.162.56.202
On since Fri Mar  1 17:40 (EST) on ttyq9 from 203.162.56.202
On since Fri Mar  1 16:50 (EST) on ttyp0 from 203.162.56.202
On since Fri Mar  1 17:10 (EST) on ttyq0 from 203.162.56.202
On since Fri Mar  1 17:55 (EST) on ttyq4 from 203.162.56.202
On since Fri Mar  1 17:35 (EST) on ttyp9 from 203.162.56.202
On since Fri Mar  1 17:15 (EST) on ttyq1 from 203.162.56.202
No unread mail
No Plan.


#237 of 293 by carson on Sat Mar 2 02:37:22 2002:

Further investigation suggests the user began this task early this
morning, with only minor outages.  However, I do not share Kenneth's
pessimism, as I recall Grex has an auto-kill program for multiple
logins.  At most, it is amusing.


#238 of 293 by jhudson on Sat Mar 2 02:53:19 2002:

This is quite amusing.  There are more efficent ways of bringing grex
down if someone really wanted to. (No, I won't demonstrate).


#239 of 293 by gelinas on Sat Mar 2 03:02:47 2002:

The auto-kill doesn't kick until grex hits 70 remote users.


#240 of 293 by rcurl on Sat Mar 2 06:22:30 2002:

Still, Tikcloak is a vandal, even if Grex repels this invader. The only
purpose of automated logins is to cause trouble.


#241 of 293 by senna on Sat Mar 2 17:37:52 2002:

It could be that they're just amusing themselves with no malicious intent,
you know.  It still needs to be stopped, but why condemn someone when you
don't need to?


#242 of 293 by rcurl on Sat Mar 2 19:11:58 2002:

Not even a *little* condemnation? Any user would know that repeated logins
with no intention of using them will occupy bandwidth and processor time
just for personal amusement. If they don't have consideration for others
can't a *little* condemnation be offered? Just a *smidgen*?



#243 of 293 by senna on Sat Mar 2 19:45:13 2002:

Very well, Rane, you may condemn them lightly if you wish. :)


#244 of 293 by jmsaul on Sat Mar 2 20:04:16 2002:

If you make a mistake while typing in your login or password, is there any
way to delete it, or do you just have to hit return twice and wait for the
delay Grex puts in before you log in again?


#245 of 293 by gull on Sat Mar 2 20:27:06 2002:

Backspace works, though it doesn't *look* like it works.


#246 of 293 by davel on Sat Mar 2 20:47:36 2002:

AFAIK ^U will wipe out your entire response.  It also may not look like it.


#247 of 293 by gelinas on Sat Mar 2 21:31:33 2002:

As gull notes, count the ^H characters; enter an appropriate number of them
and go on.


#248 of 293 by jep on Sat Mar 2 23:05:06 2002:

I use ^U in that situation.


#249 of 293 by jmsaul on Sun Mar 3 00:57:26 2002:

Cool, thanks.  The delay before you get the next login prompt is really
really (really) annoying, so I want to avoid it.


#250 of 293 by aruba on Sun Mar 3 04:55:56 2002:

(I think it's deliberately annoying, to discourage people from trying to
guess passwords by typing things over and over again.)


#251 of 293 by jmsaul on Sun Mar 3 06:32:43 2002:

I doubt it does anything to discourage twits, but it annoys the piss out of
legitimate users who make typing mistakes.  

I'd lose it, personally.  If you guys are that worried about people
hacking passwords, install a version of passwd that doesn't permit weak
ones that people could guess by typing them in.  You've already got the
limited number of attempts per telnet session, which does a lot more to
discourage password hacking than inserting a delay ever will. 

But knowing you guys, to get it changed I'd have to make a proposal in
Coop, get told that my opinion doesn't count because I'm not a paying
member, and then touch off a massive flame war about how central the delay
is to Grex's culture, and how if it were removed than people who can't
type worth shit would log in here more often and bring the tone down,
because Grex only wants people who type what they mean the first time.

The delay is right up there with confiscating nail files and letting
ballpoint pens through checkpoints on the "moronic security measures that
sound cool until you think about them for a second" scale.  In my personal
and professional opinion.



#252 of 293 by other on Sun Mar 3 07:31:10 2002:

Joe, your opinion doesn't count when you're being this pissy.


(Couldn't resist...)


#253 of 293 by russ on Sun Mar 3 13:32:10 2002:

It occurs to me that it would probably not be terribly difficult
to look for lots of logins from the same IP address, and just
set the router to block that IP address for a while.  End of
problem.


#254 of 293 by keesan on Sun Mar 3 14:49:37 2002:

I sometimes also type my password wrong since I cannot see on the screen what
I am typing.  Jmsaul appears to be a less than perfect typist.  Is there some
easy way to change things so we could see the password as we are typing?


#255 of 293 by remmers on Sun Mar 3 14:59:11 2002:

You could do it for yourself by turning on local echo temporarily
in your terminal program.  From a security point of view, it would
be a horrible idea to do it globally for everybody.


#256 of 293 by glenda on Sun Mar 3 15:13:55 2002:

There is no way in hell that I want to be able to see a password as it is
typed in.  Even when accessing from my own computer in my own home.  That
defeats the purpose of a password.  If passwords were seeable I would never,
ever login anywhere but home, and then when no one else was in the room.


#257 of 293 by aruba on Sun Mar 3 15:20:49 2002:

Re #251: Someone needs a hug.


#258 of 293 by keesan on Sun Mar 3 15:26:30 2002:

There is nobody in my apartment that I want to hide my password from, and ifI
did, they could watch what I was typing.  In fact I often watch myself type
my password to make sure I get it right.  I used to know how to turn Echo on
with Procomm (Alt-E) but probably other programs are different.  Is there
something an individual user can do to make their password appear onscreen
every time without changing the echo?


#259 of 293 by other on Sun Mar 3 16:05:42 2002:

Nope, and there never will be.  Never with Grex, and never with anything 
else into which you have to type a password, unless the author of the 
software wrote in password functionality as a mere formality without 
really caring about it.


#260 of 293 by gull on Sun Mar 3 17:13:39 2002:

I second #259, though I do like the more recent convention in some 
software of displaying asterisks as you type your password.  Makes it 
more obvious that you've actually hit the keys and the software is 
actually listening.


#261 of 293 by jmsaul on Sun Mar 3 17:21:25 2002:

Re #257:  Do I get a wet, sloppy kiss, too?

Re #254:  I never claimed to be a perfect typist.  I'm a good one, but not
          a perfect one.  I don't need to see what I'm typing, though,
          because I usually notice when I screw up.  Making the password
          visible for everyone when it's typed is a really bad idea.

          Even worse than leaving the annoying-but-somehow-useless-for-
          preventing-hacking delay in.


#262 of 293 by aruba on Sun Mar 3 17:38:41 2002:

Re #261: Not from me, but perhaps some other Grexer will oblige you.


#263 of 293 by jmsaul on Sun Mar 3 17:47:03 2002:

Tease.


#264 of 293 by davel on Sun Mar 3 21:06:45 2002:

re 260: I often am glad for things that echo asterisks or something.  However,
if I were logging in from a public place, I'd worry about it.  Making it
easier for people to know for sure how many characters you're typing is not
all that good an idea.


#265 of 293 by gelinas on Sun Mar 3 21:36:36 2002:

Lotus Notes put up a random number of heiroglyphs, rather than asterisks.


#266 of 293 by bilz on Sun Mar 3 22:12:17 2002:

why is this so slow?


#267 of 293 by gelinas on Sun Mar 3 23:52:32 2002:

What do you mean by "slow"?  If picospan ("bbs"), then it's probably because
this is a long-running conversation.


#268 of 293 by mdw on Mon Mar 4 01:02:42 2002:

The bad password delay has been a standard part of Unix login programs
for a long time.  The retry shouldn't be obnoxious unless you've managed
to typo your password twice, in which case, it probably won't hurt for
you to slowdown and think about what you're doing.

The IETF folks want to put a built-in delay of >1second (via a
computationally expensive CPU loop) for encrypting K5 passwords via AES.
If you want to worry about something, why not worry about that?


#269 of 293 by gelinas on Mon Mar 4 01:22:25 2002:

What is their excuse?


#270 of 293 by jmsaul on Mon Mar 4 02:24:24 2002:

Re #268:  It's obnoxious on one retyping.  Try it.  (I don't typo it
          twice.)


#271 of 293 by mdw on Mon Mar 4 02:43:34 2002:

Slow down brute force password cracking.


#272 of 293 by oval on Mon Mar 4 07:41:29 2002:

 :)


#273 of 293 by jhudson on Mon Mar 4 18:17:36 2002:

The problem with ^H, ^U, etc. is buried in /usr/sbin/telnetd.


#274 of 293 by hash on Wed Mar 6 03:25:36 2002:

finding a pattern in spam:
http://www.blackant.net/code/oth/random/nlp-spamfilter.php


#275 of 293 by jep on Wed Mar 6 22:14:08 2002:

Backtalk is not working; it stopped working about an hour ago.  I can
still telnet in, though.


#276 of 293 by remmers on Thu Mar 7 01:54:01 2002:

Seems to be working now.  My guess is that httpd died, then got
restarted.


#277 of 293 by keesan on Thu Mar 7 03:17:23 2002:

Looking up www.google.com, guessing (no DNS numbers available?).
The internet is not terribly usable with lynx at present.


#278 of 293 by gelinas on Thu Mar 7 03:33:42 2002:

About three minutes before #277, I noticed that 

        load average: 12.08, 7.59, 6.00

I could be wrong, of course, but I suspect the two events are related.


#279 of 293 by russ on Sat Mar 9 19:55:59 2002:

"nslookup" is freezing up instead of reporting data.


#280 of 293 by jp2 on Sat Mar 9 20:18:18 2002:

This response has been erased.



#281 of 293 by rlejeune on Tue Mar 12 21:21:07 2002:

I have been having probs with nslookup freezing up as well. 


#282 of 293 by janc on Sun Mar 17 17:25:05 2002:

I'm a lousy typist.  I've been known to cut/paste passwords.

Of course, you can log in to Backtalk, where most browsers do echo 
bullets with each keystroke and where the authentication delays are, 
well, different.

I really would like it if login/telnet/etc would accept *both* CONTROL-H 
and DELETE as backspace characters when entering logins and passwords.  
It's a pain to remember which key to use where.


#283 of 293 by gelinas on Mon Mar 18 00:28:36 2002:

Jan, are you not in probably the very best of all positions to make your dream
a reality?

I've heard UNIX geeks complain before about the lack of concensus on a
backspace key.  The discussions usually result in everyone throwing up their
hands in disgust and frustration.


#284 of 293 by jmsaul on Mon Mar 18 15:37:11 2002:

Re #282:  I'd like that too.  Very much.


#285 of 293 by remmers on Mon Mar 18 17:02:44 2002:

Personally, I find single-character backspacing to be pretty much
useless for passwords.  I can't see what I've typed, so I'm never
sure how many characters to backspace to correct the error that
I might have made.  It's largely useless for logins too, at least
for me -- when I catch a mistake, I find it faster to just kill
the whole line (ctrl-U works for this on every system I log into)
and start over.


#286 of 293 by csoval on Mon Mar 18 20:38:07 2002:

my password has been changed. very mature.


#287 of 293 by oval on Mon Mar 18 21:00:54 2002:

oh it was me who changed the password. very mature.


#288 of 293 by slynne on Mon Mar 18 21:07:55 2002:

I am so glad to know that I am not the only person who does that! ;)


#289 of 293 by oval on Mon Mar 18 21:13:22 2002:

i should really write them all down somewhere.


#290 of 293 by remmers on Mon Mar 18 21:53:38 2002:

Yep.  Post them right here in Agora.  Then you'll always know
where to look.


#291 of 293 by oval on Mon Mar 18 23:46:51 2002:

 :P



#292 of 293 by sniper99 on Wed Mar 20 11:50:54 2002:

Hello none of your games are working in the game menu.


#293 of 293 by davel on Thu Mar 21 00:39:38 2002:

Hmm.  I just tried one (boggle), & it worked fine for me.


There are no more items selected.

You have several choices: