Re: http-rules and browsing ebay Problem

[Ray Leach <raymondl@knowledgefactory.co.za>]

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On Wed, 2004-02-11 at 14:35, mgeschermann@arcor.de wrote:
> Hi all,
> 
> I spend a lot of time on building my own firewall-script. Mostly everything is working fine (some things aren't tested yet), but I've got a tricky problem and hope you can help me.
> 
> If I want to open the ebay-site from either the firewall or an client my browser tells me after a some seconds "This site could not be displayed."
> 
> I've done some logging and noticed, that after the reply I get a packet with status "NEW" from ebay. (within a few seconds after the the first reply)
> 
> 
> I'm running Suse 9.0 on my router/firewall with iptables 1.2.8. I'm using ip_conntrack.
> (The problem occurs even without conntrack.)
> 
> 
> here my rules:
> 
> iptables -t nat -A PREROUTING -i $IFACE_LAN -p tcp -s $LOCAL_LAN --dport $HTTP_PORT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
> 
> iptables -A FORWARD -i $IFACE_LAN -o $IFACE_EXT -p tcp -s $LOCAL_LAN --dport $HTTP_PORT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
> 
> iptables -A FORWARD -i $IFACE_EXT -o $IFACE_LAN -p tcp -d $LOCAL_LAN --sport $HTTP_PORT -m state --state RELATED,ESTABLISHED -j ACCEPT

Do you use a proxy server on the internal LAN?

Try doing a tcpdump showing all traffic from and to the workstation and
ebay web site.

There was a 'problem' with earlier versions of IE where the browser
would send a NEW packet after the connection was closed, never did
figure out why?

Regards

Ray
> 
-- 
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Raymond Leach <raymondl@knowledgefactory.co.za>
Network Support Specialist
http://www.knowledgefactory.co.za
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