RE: Snort / Base installation problem -- Related to IPTABLES -- I think

["Patrick Harper" <patrick () internetsecurityguru com>]

He was using my new setup doc, it does not allow for HTTP, only HTTPS.  The
problem was he had them in the wrong order, I will have to include a little
description of how the rules are read and used in the next version.


Patrick S. Harper | CISSP RHCT MCSE
www.internetsecurityguru.com

Just because your paranoid, doesn't mean they're not out to get you 


-----Original Message-----
From: snort-users-admin () lists sourceforge net
[mailto:snort-users-admin () lists sourceforge net] On Behalf Of Jeff Kell
Sent: Thursday, November 03, 2005 8:44 AM
To: Timothy A. Holmes
Cc: Snort Users
Subject: Re: [Snort-users] Snort / Base installation problem -- Related to
IPTABLES -- I think

Timothy A. Holmes wrote:

> Somehow I have gotten something messed up, so that I cannot get access
> to the webpages hosted on the snort box -- either by http or https, the
> problem goes away when I turn off IPTABLES

You have your iptables rules ordered wrong, and you're missing an http
permit.

You have:

> -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j
ACCEPT
> -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited

The above will reject anything else, and you'll never make it past there to
get to your otherwise valid:

> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j
ACCEPT

What you need is more like:

> -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j
ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j
> -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited

Jeff



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