Re: [squid-users] iptables stops pingning (with iptables file)

Yogesh Patil wrote:
> * Sorry for dulipcate messages, i don't know that it doesn;'t supports
> big attachment
>
> Hello,
> I am using SQUID 2.6.STABLE17 with fedora core 8, & BIND
> DNS SERVER configured on the same box, i have configured squid as
> transparent proxy, and applied iptables rule by using the following
> command
>
> iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT
> --to-port 3128
>
> service iptables save
>
> so when i restart iptables after appling & saving above i
> get following:
>
> Flushing firewall rules: [ OK ]
> Setting chains to policy ACCEPT: filter nat [ OK ]
> Unloading iptables modules: [FAILED]
> Applying iptables firewall rules: [ OK ]
> Loading additional iptables modules: nf_conntrack_netbios_n[ OK ]
>
> so if i try to ping to (any public ip) from client PC after
> enabling iptables i get request time out, but i can browse websites
> without any problem, and if i disable iptables i can get reply from
>
> the (public ip) to which i am pinging and browsing also works. also
> checked DNS resolution it works perfectly as browsing works.
>
> so i would like to know what is the reason of stopping ping
> after enabling iptables and why i am getting Unloading iptables
> modules FAILED.
<snip>

This is an iptables problem. If squid is browsing properly it can't be
squid.

Best try to contact your RedHat support person, or the
iptables/netfilter contact lists.

Amos

-- 
Please use Squid 2.6STABLE17+ or 3.0STABLE1+
There are serious security advisories out on all earlier releases.