Re: Flexresp2 installation and configuration Problem

["RAJNEEL DHOTRE" <rajneel_d () hotmail com>]

Thanks Matt... i am new to snort ... i am running Snort 2.0.4 ... does it 
support ?

I have downloaded snort-flexresp2-prepatched.tgz  ....



regards,
Rajneel





> From: Matt Kettler <mkettler () evi-inc com>
> To: "RAJNEEL DHOTRE" <rajneel_d () hotmail com>,   
> snort-users () lists sourceforge net
> Subject: Re: [Snort-users] Flexresp2 installation and configuration  
> Problem
> Date: Tue, 23 Dec 2003 10:44:39 -0500
>
> At 06:53 AM 12/23/2003, RAJNEEL DHOTRE wrote:
> > I have download and installed Flexresp2 and libnet.  I have also add the 
> > resp:reset in icmp rules.
>
> Um.. what do you think a resp:reset going to do to an icmp message?
>
> resp:reset ONLY works for TCP.. it does NOT work for icmp, or udp. It can't 
> work for icmp or udp.. It doesn't even make sense to try.
>
> UDP and ICMP are stateless.. It is impossible to reset (or desynchronize) 
> the connection, because there is no connection.
>
> In the case of UDP and ICMP, your best bet is icmp_host, but bear in mind 
> an attacker WILL ignore them.
>
> Disclaimer about reliability:
> Resp:reset can be probably evaded by a sophisticated attacker with enough 
> tries, but icmp_host can be evaded by an amateur... however, it's your only 
> option for stateless stuff... It is still better than nothing, but 
> flexresp2 is not replacement for a firewall. Use it as a supplement, but 
> keep your firewalls properly configured as your first defense.
>
>
> > ERROR: Unknown config directive: config flexresp2_interface:eth0
> > Fatal Error, Quitting..
>
> Did you download a precompiled binary, or source code? the above message 
> snounds like you're running a version of snort that does not support 
> flexresp2.
>
>
>
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