Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations IamaSherpa on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
telnet timeout
- Thread starter madra
- Start date
RodKnowlton
MIS
- Apr 26, 2000
- 1,005
The TMOUT and TIMEOUT variables will only come into play if you sit at an idle shell prompt for the designated time period.
If you're connecting through a firewall, there's usually a timeout on the firewall for tracking sessions. If there's no traffic on a connection within the timeout period, the firewall drops the connection to free up memory for tracking active connections. To both your telnet client and the telnet server it will appear as if the other dropped the connection.
If you're able to use PuTTY as your telnet client (it can do straight telnet as well as ssh), there's a setting that can be configured to send null packets on a periodic basis as a "keepalive".
Another option, on the AIX side, is to look at the "no" command's man page, particularly the options starting with "tcp_keep".
- Rod
IBM Certified Advanced Technical Expert pSeries and AIX 5L
CompTIA Linux+
CompTIA Security+
A Simple Code for Posting on the Web
If you're connecting through a firewall, there's usually a timeout on the firewall for tracking sessions. If there's no traffic on a connection within the timeout period, the firewall drops the connection to free up memory for tracking active connections. To both your telnet client and the telnet server it will appear as if the other dropped the connection.
If you're able to use PuTTY as your telnet client (it can do straight telnet as well as ssh), there's a setting that can be configured to send null packets on a periodic basis as a "keepalive".
Another option, on the AIX side, is to look at the "no" command's man page, particularly the options starting with "tcp_keep".
- Rod
IBM Certified Advanced Technical Expert pSeries and AIX 5L
CompTIA Linux+
CompTIA Security+
A Simple Code for Posting on the Web
There is also a timeout setting for the login prompt. See usw stanza in /etc/security/login.cfg (attribute logintimeout).
The default is "logintimeout = 60". You'd think that setting it to zero would mean no timeout, but it uses the default of 60 seconds also. I set it to a large number: 3000000 i.e. more than one month - close enough to forever to me.
There's a tool to do this, saves you editing the config file manually (and getting it wrong or messing up the file ;-))
HTH,
p5wizard
The default is "logintimeout = 60". You'd think that setting it to zero would mean no timeout, but it uses the default of 60 seconds also. I set it to a large number: 3000000 i.e. more than one month - close enough to forever to me.
There's a tool to do this, saves you editing the config file manually (and getting it wrong or messing up the file ;-))
Code:
chsec -f /etc/security/login.cfg -s usw -a logintimeout=3000000HTH,
p5wizard
- Thread starter
- #5
thanks for you replies
A bit further discussion with the customer and it could well be the RF terminals and their firmware.
Also, found that it is a known issue with AIX5.3 and APAR IY894729 (TCP keepalive issue) in TL5 SP3 or TL6 resolves it.
thanks again
A bit further discussion with the customer and it could well be the RF terminals and their firmware.
Also, found that it is a known issue with AIX5.3 and APAR IY894729 (TCP keepalive issue) in TL5 SP3 or TL6 resolves it.
thanks again
FrankieAIX
Technical User
Does the timeout setting presented above work with CDE sessions as well?
I set the logintimeout=15 ...... After 15 minutes I wasnt logged out, but rather the terminal was locked. How do I go about enabling auto log of a idle session?
-FrankieAIX
I set the logintimeout=15 ...... After 15 minutes I wasnt logged out, but rather the terminal was locked. How do I go about enabling auto log of a idle session?
-FrankieAIX
- Status
Similar threads