red hat firewall question

McDougall, Marshall (FSH) Marshall.McDougall at gov.mb.ca
Tue Dec 4 20:48:30 UTC 2007


Sorry, didn't realize that there were external forces (firewall) in play
here.  Might there be a better solution from the client side?  We have
FW issues like that here(our timeouts are 20 minutes) and we mitigate it
by turning on "keep alives" in the putty, DB client, etc.

Regards, Marshall 

>-----Original Message-----
>From: redhat-list-bounces at redhat.com 
>[mailto:redhat-list-bounces at redhat.com] On Behalf Of Anne Moore
>Sent: Tuesday, December 04, 2007 11:09 AM
>To: 'General Red Hat Linux discussion list'
>Subject: RE: red hat firewall question
>
>Hi Marshall
>
>Well I've already determined that this will fix the issues. 
>The problem is
>indeed with our firewall and it cannot be changed due to our security
>policy. Thus, I created a script that continually pings every 
>30 seconds and
>that keeps the logons alive.
>
>So, if I can get the firewall to do it's own version of "ping" 
>using "keep
>state" then it will take affect for all tcp connections to the 
>server. Since
>I know that this will fix all of our disconnection issues, and 
>it appears to
>be a very easy fix, then I'm going to go ahead and get it completed.
>
>However, I don't know how to properly use "keep state" with my 
>firewall.
>
>Any ideas on this? I just don't know much about Ipfilter and the proper
>syntax.
>
>Thank you again for your help.
>
>Anne
>
>
>
>-----Original Message-----
>From: redhat-list-bounces at redhat.com 
>[mailto:redhat-list-bounces at redhat.com]
>On Behalf Of McDougall, Marshall (FSH)
>Sent: Tuesday, December 04, 2007 11:54 AM
>To: General Red Hat Linux discussion list
>Subject: RE: red hat firewall question
>
> 
>
>>-----Original Message-----
>>From: redhat-list-bounces at redhat.com
>>[mailto:redhat-list-bounces at redhat.com] On Behalf Of Anne Moore
>>Sent: Tuesday, December 04, 2007 10:28 AM
>>To: 'General Red Hat Linux discussion list'
>>Subject: red hat firewall question
>>
>>Hi All
>>
>>I figured out a way, I think, to keep my connections alive while my 
>>users are connected to my Red Hat Enterprise 4 servers.
>>
>>I thought I would create a firewall rule (or something like
>>that) that keeps
>>tcp alive (keep-state?).
>>
>>Something like this:
>>
>>"allow tcp from any to any keep-state"
>>
>>What do you all think? Is this the correct syntax to use to keep tcp 
>>connections alive? or is there a better way?
>>
>>Thank you again for your help.
>>
>>Anne
>
>
>Anne. 
>
>I think you see the symptom, but you don't yet understand your 
>problem, and
>are hoping that this will solve it.  I would be looking at the overall
>network config, because with a properly configured server 
>there is no reason
>for your it to be dumping connections after 1 minute.
>
>Regards, Marshall
>
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