Problem with Outlook Express

mkp · 01-20-2010, 01:55 AM

Run this in RHEL console:

iptables --list PREROUTING -t nat

and post the result.

Do you have router before RHEL, like Cisco.

sohailkmu · 01-20-2010, 02:03 AM

I don't have a cisco router.

# iptables --list PREROUTING -t nat
Chain PREROUTING (policy ACCEPT)
target prot opt source destination

mkp · 01-20-2010, 02:54 AM

Only for test try to set squid in transparent mode. In this case you need to set this rule in iptables:

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port xxxx(port in squid.conf)

Also, how many PC are in this network?

And see this to http://lists.netfilter.org/pipermail...il/065511.html

linuxlover.chaitanya · 01-20-2010, 10:46 PM

OP does not have issue with squid if I can read the post correctly. This is a common issue faced and this is because squid is not smtp or pop proxy. I have been looking for solution myself and I havent found one suitable. One way is to use p3scan. It is a smtp, pop3 and pop3s proxy which can be made as transparent with netfilter rules. There is a howto as well.