Aaron Schultz <[EMAIL PROTECTED]> spake thus:

> Date: Sun, 10 Sep 2000 11:39:22 -0700 (PDT)
> From: Aaron Schultz <[EMAIL PROTECTED]>
> Subject: Re: IPChains / IPFilter question
> 
> On Sun, 10 Sep 2000, mouss wrote:
> 
> > In my opinion, the available open source packet filters are
> > comarable to what commercial firewalls provide. They are 
> > even superior to many of the commercial FWs filters.
> > 
> > "watching for regular stuff" is more an issue for IDS than or 
> > the filters. 
> > Indeed, either the implementation is light and is thus really
> > insufficient, or it is "complete" and consumes too much 
> > resources which makes it unusable on a FW (if you spend your 
> > time cheking your numerous patterns, your packet queue is gonna
> > stay full...).
> 
> The only experience I've had with the IDS/firewall working 
> together was with the company "ZoneOfTrust.com".  Their system 
> seemed to be able to watch a high-volume website and actually 
> catch items which appeared to be attacks and add the appropriate
> firewall rules.  
> I've not seen this style of functionality in ipchains yet, 
> although it's able to be manipulated by programs like portsentry
> to provide some level of stopping attacks realtime.
> 
> - - Aaron Schultz
> - - [EMAIL PROTECTED]
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Beware 

The big danger with realtime automated response is the 
risk of an attacker spoofing the source and causing your
firewall to Denial of Service you.

Robin Pollard

Netherlands:
Fax:    +31 (0)20 8675865

UK:
fax:     +44 (0)870 1243 357

United States:
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