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Re: [FW1] unknown established tcp packets...



Carl,
Have a look at 
http://www.phoneboy.com/fw1/faq/0408.html on this problem
Cristian

"Carl E. Mankinen" wrote:
> 
> I have been noticing since I upgraded to 4.1 SP2 that my logs are getting a lot more of these rule 0 drops than I had ever seen
> before.
> >From what I understand, this happens because the firewall is receiving a TCP packet with the established bit set and it has no
> session information in it's state tables to verify that this is a valid conversation.
> 
> Is this something that just happens a lot with TCP conversations and nothing to be concerned about, or is this a symptom of some
> problem which I should pay closer attention too? The packets which are causing the rule 0 drop are invariably arriving at the
> outside interface.
> 
> I know I can prevent this from being logged, but I would rather make sure that I am not covering up a problem before I do this. My
> interfaces on all my routers look really clean, and the settings on the firewall properties for TCP session timeouts is set for 30
> minuten.
> 
> Could this be a problem with my fw dropping it's state table entries?
> 
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