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Re: [FW1] TCP TimeOut Problems



I've been having the same problem recently, since I upgraded from 4.0 sp3 to 4.1
sp2 (NT4 Management and 2 Nokia 440's running IPSO 3.3)

It looks like I've managed to fix it with the help of Phoneboy (searching for
Unknown TCP packets)

All you have to do is uncomment a line in the $fwdir\lib\fwui_head.def and the
line is

#define ALLOW_NON_SYN_RULEBASE_MATCH

Basically, what this does is to revert back to the 4.0 way of handling
connections in the state table.
 I had to make this change under intense pressure from 'the business' as 90% of
our users and external clients were being kicked off their
connections to an AS/400 box. I still have reservations about the fix (for
security reasons) but didn't have a choice.

Hope this helps,

Jonathan Jackson
Network Security Analyst
AMP Group
4 Broadgate, Liverpool St
London, EC2M 2PA
Tel (44)[email protected]




"GIRAUT,JESUS (HP-Venezuela,ex1)" <[email protected]> on 09/04/2001 20:29:46

To:   [email protected]
cc:    (bcc: Jonathan B Jackson(IT)/UK/AMP)
Subject:  [FW1] TCP TimeOut Problems



Hi everybody,

I'm having some problems with a UNIX server protected by a Firewall-1
running on a Windows NT box.  The users are accessing an application via
telnet on the Unix server which controls a printer located outside the
firewall.  These users access some sections from this application and send
information to the printer, they receive the following problem:

When they try to print some information, the printer starts printing the job
but after 2 or 3 minutes the telnet session to the server suddenly stops and
it stops also the printing.  I think this a TCP timeout problem, however I'm
using some configuration documents from the CheckPoint support web site in
order to increase this tcp timeout value but I keep receiving the same
problem.

I don't know if I'm missing some steps on the configuration of the TCP
timeout, or if it could be a timeout on the same Windows NT operative
system.  Any similar experience?

Thanks and regards,


=========================================================
        _/               |  Jesus Giraut
       _/                |  IT Solution Consultant
      _/_/_/  _/_/_/     |  MCA Region
     _/  _/  _/  _/      |  HP Consulting
    _/  _/  _/_/_/       |  Phone:  (_/            |  Fax:    (_/             |  Telnet: 1-207-8083
                         |  Mobile: (58-212) 14-274-7457
                         |  eMail:  [email protected]
=========================================================





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