[lug] Telnet timeout or Oracle client timeout

D. Stimits stimits at idcomm.com
Wed May 31 20:44:09 MDT 2000

carl.wagner at level3.com wrote:
> One thought, have you tried to leave a telnet session up between the
> 2 Linux boxes?  Have you tried different client software?
> I have left telnet sessions up for weeks if not months from a xterm.
> That was not Linux but I don't think Linux's version has a time-out.
> (ftp does time-out after around 15 minutes of inactivity)
> Are these plain telnet sessions or are you starting an application in them?
> (try it with just telneting and leaving it at the prompt)  I have seen
> applications that will drop the connection when terminating.
> Do you have a network problem?  This will cause you to lose your connection
> (this is what is responsible for most of my telnet abnormal terminations).

I know windows has some timeouts set, although I'm not sure where you'd
find it for general telnet. For ISAPI and ODBC, there are limits for
both network timeouts and the individual ISAPI or ODBC (each ODBC in DSN
will have its own settings in NT or 2000, probably in 98 as well). If
ISAPI is being used, you probably need the NT option pack for NT 4, or
other admin tools for 2000. If communications is ODBC, and using a
database suggests it would be, then you'll need to configure timeouts at
the windows end (I haven't had to use 3rd party ODBC at the linux end,
so settings there for timeout are probably in a .rc file). If you are
running an app at the linux side, you might try to run it under the
nohup option (usually this is a shell built-in, so you'll likely need to
check man for the shell you use). E.G., "nohup someclient".

> Carl.
> Jeffry Scott wrote:
> >
> > Folks, apologies if this has been covered elsewhere:
> >
> >   1. Is there a system or application setting that can remove a low timeout
> >      limit on telnet?  Would this setting be placed on the Linux telnet
> >      server/host, or on the telnet client?  If so, where is it?
> >   2. Is there a similar timeout setting on a Linux Oracle server that may
> >      enforce low timeout limits (~10-15 minutes)?  Or is this setting placed
> >      on/in the Oracle client?
> >
> > Background for both these questions:
> >
> >   1. A number of my associates are running telnet clients from Windoze NT
> >      and Windoze 98 boxes, on to a Gateway P200 (w/ RedHat Linux 6.0), or a
> >      Compaq dual processor P3-500 (w/ RedHat Linux 6.1).  In all
> >      combinations their telnet session is terminated after 10-20 minutes of
> >      inactivity.  We've looked high and low for settings in the client
> >      software, or on the Linux hosts, to no avail.  Search of www.redhat.com
> >      just times out.  Per some local Linux gurus, we LinuxLayPersons are
> >      told we are fools, and that a telnet timeout setting is right up there
> >      with changing lead to gold. Either these gurus are misguided, these
> >      mythical/mystical timeout settings don't exist, or we are looking in
> >      the wrong places.  Any pointers, hints, tips, incantations would be
> >      most appreciated.
> >   2. These same associates (not the local Linux gurus) are running Oracle8i
> >      SQLNETW clients to the Linux Oracle8i (8.1.5, we haven't received the
> >      8.1.6 CDs yet) database instance.  The SQLNETW client will time out
> >      after 10-15 minutes of inactivity.  This has some nasty implications
> >      for an application we are developing, as we'd like to created some
> >      pooled connections from a client application to the DBMS.  Obviously,
> >      if the pooled connections time out after a while, it's not much use
> >      having them around.  A call to Oracle Technical Support yielded "there
> >      is now timeout setting for Net8, it must be a system/OS problem."  OK,
> >      but ideas on WHERE in the OS?  We've stumped Oracle Technical Support
> >      on that one.
> >
> > Obviously, we'd like to get both problems solved, but the second has higher
> > importance.  Again, any tips, hints, whatever, would be most appreciated.
> > Post via this group or to me directly.  I'll post a solution (if any) and
> > will buy the first solution provider a jefe's lunch at a Mexican eatery in
> > Boulder County.
> >
> > Thanks for listening.
> >
> > Jeff Scott
> > jeffry at advsysconsult.com
> > 970 493-4276 _______________________________________________ Web Page:
> > http://lug.boulder.co.us Mailing List:
> > http://lists.lug.boulder.co.us/mailman/listinfo/lug
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