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Re: iptables stops pingning (with iptables file)

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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.

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