Seems I got bored and looked at your problem anyway ...
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.
HERE IS MY /etc/iptables FILE
# Generated by iptables-save v1.3.8 on Sat Jan 26 17:51:31 2008
*nat
:PREROUTING ACCEPT [5:862]
:POSTROUTING ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A PREROUTING -i eth0 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 3128
COMMIT
# Completed on Sat Jan 26 17:51:31 2008
# Generated by iptables-save v1.3.8 on Sat Jan 26 17:51:31 2008
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [5:454]
:RH-Firewall-1-INPUT - [0:0]
-A INPUT -j RH-Firewall-1-INPUT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
-A RH-Firewall-1-INPUT -i lo -j ACCEPT
-A RH-Firewall-1-INPUT -i eth0 -j ACCEPT
-A RH-Firewall-1-INPUT -p icmp -m icmp --icmp-type any -j ACCEPT
This ICMP ACCEPT is in INPUT chain.
FORWARD chain contains only a global REJECT which will aturally block
ICMP, UDP, TCP and everythign else being forwarded.
Transparent-Squid only works because www packets now secretly going to
localhost via INPUT and OUTPUT without entering FORWARD chain.
Try adding:
-A FORWARD -p icmp -m icmp --icmp-type any -j ACCEPT
ahead of the first "-A FORWARD" line.
Or reconsidering your FORWARD content entirely.
-A RH-Firewall-1-INPUT -p esp -j ACCEPT
-A RH-Firewall-1-INPUT -p ah -j ACCEPT
-A RH-Firewall-1-INPUT -d 224.0.0.251 -p udp -m udp --dport 5353 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT
-A RH-Firewall-1-INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 137 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 138 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 139 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 445 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p udp -m state --state NEW -m udp --dport 53 -j ACCEPT
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW -m tcp --dport 3128
-j ACCEPT
-A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Sat Jan 26 17:51:31 2008
THANKS IN ADVANCE
--
Regards,
Yogesh Patil
--
Please use Squid 2.6STABLE17+ or 3.0STABLE1+
There are serious security advisories out on all earlier releases.
