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. for reference i have attached my iptables & squid.conf file, PLZ HELP ME OUT. THANKS IN ADVANCE -- Regards, Yogesh Patil