Increase Telnet Login Time

[LucianoCarvalho]

Hi! Does anyone know if there is anyway to increase the time that telnet will wait before a user enter the login name????

[Domenico_5]

Hi luciano

i think that is a security feature and cannot be modified.

bye

[Emanuel Sardenberg]

Hi!

# vi /etc/inetd.conf
telnet stream tcp nowait root /usr/lbin/telnetd telnetd -z???

Example -z100 in ms(mili seconds)

[Roger Baptiste]

hi,

i don't think it is possible.
The -z feature? - never seen it. The man pages do not mention it.

-raj

[James R. Ferguson]

Hi:

The '-z' option to 'telnetd' is docunmented in the 11i man pages:

/begin_quote/

This option allows users to set the BUFFERTIMEOUT value. This option, when set, informs telnetd how long it should wait before timing out and flushing the concatenated user data to TCP. Note that the TIMEOUT value is measured in clock ticks (10ms) and not in seconds. This option is set with integer values. There is no specified default.

/end_quote/

Regards!

...JRF...

[harry d brown jr]

Are you trying to script the login? if so, perl can do this for you:

http://www.perlfect.com/articles/telnet.shtml

live free or die
harry

[LucianoCarvalho]

Thanks Guys!.
But I think the -z option will change the time that telnetd will wait before send user data and not the time that telnet will wait before disconect if the user don't enter the user login.
Thanks anyway.

[LucianoCarvalho]

I made the test and the -z option didn't work to set the login timeout.
thanks

[harry d brown jr]

If you want to set the logout time do this in the users profile:

readonly TMOUT=600

If they are inactive for 5 minutes at a SHELL PROMPT only, then they will be logged out. Of course if it is in their profile, it won't matter if they telnet'd or rlogin'd in.

BUT if they are using something like "vi", "emacs", in an application, piping something to "more", whatever they are doing, if they are NOT at a SHELL PROMPT, then they will NOT be logged out. If you want to logout idle users then you have to write a process to look for them and "kill" them. This is something I DO NOT BELIEVE in, unless you know exactly what they are doing, especially if they are in an application.

live free or die
harry

[LucianoCarvalho]

Thnkas harry, but that's not exactly what I'm looking for(please don't feel angry). The time I'm referencing is not the time set by TMOUT. Let me try to explain. When the user tries telnet to a HP-UX machine, the HP-UX/telnetd will wait normally 1 minute until the user informs the login name. If the user do not inform the login name, the HP-UX/telnetd will disconect the telnet session. The 1 minute before the machine disconect the user if there is no login name informed is the time I'm trying to modify. I don't know if it is possible.
Thanks a lot.

[Thomas Schler_1]

Luciano,

you do have to control the time-out on the server side, i.e. telnetd(1M) of the host where you want to login. The default time-out value is 2 min (120 s). If you e.g. want to double the time-out value for telnetd you have to run telnetd with the option -n240 (i.e. 240 s) started from /etc/inetd.conf:

telnet stream tcp nowait root /usr/lbin/telnetd telnetd -n240

Reboot the system after changing inetd.conf.

[harry d brown jr]

Luciano,

Are you running 11i??

And to clarify things, you want to change the TIMEOUT at the LOGIN prompt, correct??

live free or die
harry

[LucianoCarvalho]

Yes Harry. I'm running 11.i and the time is the TIMEOUT at the LOGIN prompt.
thanks

[harry d brown jr]

Luciano,

I've been playing with the -z and -n option without any luck. It appears neither option does squat at the login prompt. I'm not even sure it will ever timeout. I'll keep playing and researching, but it doesn't look good :-(

BTW, when making changes to inetd.conf, you have to issue a "inetd -c" to have it reread the configuration file (/etc/inetd.conf).


live free or die
harry

[LucianoCarvalho]

Ok! Harry. Thanks a lot for your help.