just a little question

Message

wonker · Post by **wonker** » Wed Aug 17, 2005 6:03 pm

hey,

Ive been messing about with my computer, you know, having a look at stuff and wondering what to play with next, and ive found something i want ssh to do but i havent found any docs specific to my question.

You know when you type

$ ssh [hostname] -l [username]

Well, some of my freinds have a message that comes up before you login saying stuff like

Dear Mr Hacker,

A script on this machine has automatically posted your IP address on over 200 hacker sites.

Good luck with that

So far, ive found the /etc/motd file where it gives you a message AFTER you login, but ive found nothing relating to the message before you login. I know this is a simple little question, but its one of those ones that i wont be able to leave until i get it.

its driving me nuts

D2T · Post by **D2T** » Wed Aug 17, 2005 6:07 pm

http://gentoo-wiki.com/TIP_Console_Prompt

hint: /etc/issue files

wonker · Post by **wonker** » Wed Aug 17, 2005 6:09 pm

excellent

cheers buddy

funkyrikg · Post by **funkyrikg** » Wed Aug 17, 2005 10:58 pm

Came across this thread and was instantly curious. I have tried using the example from the tip documentation. And in the main it works, but I can't get the escape characters to work when I log in I get the output below.

Is this what should happen with ssh? Or is there something I'm missing in my config? Not majorily important, but would be a nice to have.

Code: Select all


      __q@@@@m_
     _q@@@@@@@@@@_
    _@@@@@@@@@@@@@@m
   q@@@@@@@@@@@@@@@@@_
  _@@@@@@@@@@##@@@@@@@h      Hostname:  \n
  @@@@@@@@@@@ ##@@@@@@@@_    OS:        Gentoo \s
  7##@@@@@@@___@@@@@@@@@@,   Kernel:    \r
    ####@@@@@@@@@@@@@@@@@@   Processor: \m
      ####@@@@@@@@@@@@@@@@   Memory:    516220 kB
       q@@@@@@@@@@@@@@@@#W   Terminal:  \l
      q@@@@@@@@@@@@@@@@@@/
    _@@@@@@@@@@@@@@@@#@@
   q@@@@@@@@@@@@@@@#@##^
  m#@@@@@@@@@@@@@@#@#W
 _q@@@@@@@@@@@@@#@#*>
  p@@@@@@@@@@@#@##%
   _##@@@@@##@#@#g
     _#@@@@@@#@@
       _p@@@@q

Cinder6 · Post by **Cinder6** » Thu Aug 18, 2005 12:08 am

Hmm, I tried it out, but it doesn't give that prompt when I ssh in.

m_sqrd · Post by **m_sqrd** » Thu Aug 18, 2005 12:39 am

better hint
grep -i banner /etc/ssh/sshd_config

Cinder6 · Post by **Cinder6** » Thu Aug 18, 2005 4:50 am

I checked out banner...

Banner /etc/issues
did nothing...but maybe I should try it from a remote system.

EDIT: Just tried on my other system, and I don't get any messages, just the plain old Password: prompt

bone · Post by **bone** » Thu Aug 18, 2005 8:17 am

Did you restart sshd after you changed the Banner variable? This config is not dynamic, and is only read at startup.

jt

Cinder6 wrote:I checked out banner...

Banner /etc/issues
did nothing...but maybe I should try it from a remote system.

EDIT: Just tried on my other system, and I don't get any messages, just the plain old Password: prompt

funkyrikg · Post by **funkyrikg** » Thu Aug 18, 2005 8:19 am

This is the line I have in my sshd_config:

Code: Select all

Banner /etc/issue.logo

Remember to ensure that the file exists, otherwise nothing will happen, though I am having strange results (escape characters not working). Colours don't work when I hit the box direct from PuTTY (best terminal emulator ever) on my Window$ machine.

I'm not convinced I can get this to work with my set up. But if anyone has a suggestion, I'd be pleased to hear it, my knowledge of agetty is non-existent at the moment.

Cinder6 · Post by **Cinder6** » Thu Aug 18, 2005 6:03 pm

Okay, I will try that when I get back on the system in question. Right now it is pointing to a symlink, so maybe that is the problem.

Cinder6 · Post by **Cinder6** » Thu Aug 18, 2005 11:35 pm

Okay, I have changed Banner to "Banner /etc/issues.logo"...still no go

christsong84 · Post by **christsong84** » Thu Aug 18, 2005 11:39 pm

Cinder6 wrote:Okay, I have changed Banner to "Banner /etc/issues.logo"...still no go

I assume the /etc/issues.logo file contains what you want displayed? Simple but always check those things

m_sqrd · Post by **m_sqrd** » Thu Aug 18, 2005 11:46 pm

what in the file ?

Cinder6 · Post by **Cinder6** » Fri Aug 19, 2005 5:28 am

It is the standard /etc/issues.logo file. You should have one, as well. It has a purple ASCII Gentoo logo, then the login.

Jeremy_Z · Post by **Jeremy_Z** » Fri Aug 19, 2005 6:40 am

Just tried this. Adding Banner /etc/issue.logo, the restart sshd, then logging (from localhost).
I have the Gentoo purple logo before asking password, so that works, but the escaped characters after the logo are displayed just like that ( This is \n.\O (\s \m \r) \t ), so i guess they do not work there.

Cinder6 · Post by **Cinder6** » Fri Aug 19, 2005 7:09 am

I don't get any unique prompt at all. Just says "Password:".

Jeremy_Z · Post by **Jeremy_Z** » Fri Aug 19, 2005 7:14 am

Hum, just to clarify : it is /etc/issue.logo, NOT /etc/issues.logo

m_sqrd · Post by **m_sqrd** » Fri Aug 19, 2005 2:48 pm

The escape codes are only used by [a]getty so banner just show them as text.

Cinder6 · Post by **Cinder6** » Fri Aug 19, 2005 5:28 pm

It is issue.logo? Hmm, I will check that out when I get the chance.

Cinder6 · Post by **Cinder6** » Sun Aug 21, 2005 5:39 am

Okay, I had pointed to /etc/issues.logo, and not /etc/issue.logo. Thanks!

calubro · Post by **calubro** » Sat Aug 27, 2005 8:19 am

*ahem* stupid question ... but why do i get the logo AFTER typing the username?

Code: Select all

login as: root
[0;35;40m                                           .
[0;35;40m     .vir.                                d$b
[0;35;40m  .d$$$$$$b.    .cd$$b.     .d$$b.   d$$$$$$$$$$$b  .d$$b.      .d$$b.
[0;35;40m  $$$$( )$$$b d$$$()$$$.   d$$$$$$$b Q$$$$$$$P$$$P.$$$$$$$b.  .$$$$$$$b.
[0;35;40m  Q$$$$$$$$$$B$$$$$$$$P"  d$$$PQ$$$$b.   $$$$.   .$$$P' `$$$ .$$$P' `$$$
[0;35;40m    "$$$$$$$P Q$$$$$$$b  d$$$P   Q$$$$b  $$$$b   $$$$b..d$$$ $$$$b..d$$$
[0;35;40m   d$$$$$$P"   "$$$$$$$$ Q$$$     Q$$$$  $$$$$   `Q$$$$$$$P  `Q$$$$$$$P
[0;35;40m  $$$$$$$P       `"""""   ""        ""   Q$$$P     "Q$$$P"     "Q$$$P"
[0;35;40m  `Q$$P"                                  """
[0;37;40m

This is \n.\O (\s \m \r) \t

Using keyboard-interactive authentication.
Password:
Access denied
Using keyboard-interactive authentication.
Password:
Last login: Fri Aug 26 15:50:33 2005 from 192.168.1.2

also the "This is \n.\O (\s \m \r) \t" does not work

Code: Select all

grep -i banner /etc/ssh/sshd_config
# no default banner path
Banner /etc/issue.logo

the file /etc/issue.logo:

Code: Select all

server ~ # cat /etc/issue.logo
                                           .
     .vir.                                d$b
  .d$$$$$$b.    .cd$$b.     .d$$b.   d$$$$$$$$$$$b  .d$$b.      .d$$b.
  $$$$( )$$$b d$$$()$$$.   d$$$$$$$b Q$$$$$$$P$$$P.$$$$$$$b.  .$$$$$$$b.
  Q$$$$$$$$$$B$$$$$$$$P"  d$$$PQ$$$$b.   $$$$.   .$$$P' `$$$ .$$$P' `$$$
    "$$$$$$$P Q$$$$$$$b  d$$$P   Q$$$$b  $$$$b   $$$$b..d$$$ $$$$b..d$$$
   d$$$$$$P"   "$$$$$$$$ Q$$$     Q$$$$  $$$$$   `Q$$$$$$$P  `Q$$$$$$$P
  $$$$$$$P       `"""""   ""        ""   Q$$$P     "Q$$$P"     "Q$$$P"
  `Q$$P"                                  """


This is \n.\O (\s \m \r) \t

g.cal

Cinder6 · Post by **Cinder6** » Sat Aug 27, 2005 5:08 pm

Try /etc/motd to get it after you log in.

calubro · Post by **calubro** » Sun Aug 28, 2005 2:43 pm

ok .. i tried nothing, and everthing was left like it is listed above, but as i found out, it does not work throug putty, but it works at a "direct" login at the server.
g.cal

Cinder6 · Post by **Cinder6** » Sun Aug 28, 2005 4:10 pm

Correct. It would appear it doesn't work through putty.