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From: nullv@gmx.com
To: users@lists.fedoraproject.org, netfilter@vger.kernel.org
Subject: IPTable Rules... again
Date: Thu, 08 Mar 2012 10:16:48 -0500	[thread overview]
Message-ID: <20120308151651.300950@gmx.com> (raw)

Hi,

I have the following  rules on my router/gateway: 

*nat
:PREROUTING ACCEPT 
:INPUT ACCEPT 
:OUTPUT ACCEPT 
:POSTROUTING ACCEPT 
-A POSTROUTING -d 93.186.25.52/32 -m comment --comment "bb" -j SNAT --to-source 41.94.39.49-41.94.39.51
-A POSTROUTING -s 10.0.0.0/8 -p tcp -m tcp --dport 53 -m comment --comment "domain" o eth0 -j SNAT --to-source 41.94.39.49-41.94.39.51
-A POSTROUTING -s 10.0.0.0/8 -p udp -m udp --dport 53 -m comment --comment "domain" -j SNAT --to-source 41.94.39.49-41.94.39.51
-A POSTROUTING -s 10.0.0.0/8 -p tcp -m tcp --dport 995 -m comment --comment "pop3s" -j SNAT --to-source 41.94.39.49-41.94.39.51
-A POSTROUTING -s 10.0.0.0/8 -p udp -m udp --dport 995 -m comment --comment "pop3s" -j SNAT --to-source 41.94.39.49-41.94.39.51
-A POSTROUTING -s 10.0.0.0/8 -p tcp -m tcp --dport 587 -m comment --comment "submission" -j SNAT --to-source 41.94.39.49-41.94.39.51
-A POSTROUTING -s 10.0.0.0/8 -p udp -m udp --dport 587 -m comment --comment "submission" -j SNAT --to-source 41.94.39.49-41.94.39.51
-A POSTROUTING -s 10.0.0.3/32 -j o eth0 -j SNAT --to-source 41.94.39.49-41.94.39.51
COMMIT
*filter
:INPUT ACCEPT 
:FORWARD ACCEPT 
:OUTPUT ACCEPT 
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -i eth1 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -p icmp -j ACCEPT
-A FORWARD -i lo -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p tcp -m tcp --dport 53 -m comment --comment "domain" -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p udp -m udp --dport 53 -m comment --comment "domain" -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p tcp -m tcp --dport 995 -m comment --comment "pop3s" -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p udp -m udp --dport 995 -m comment --comment "pop3s" -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p tcp -m tcp --dport 587 -m comment --comment "submission" -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p udp -m udp --dport 587 -m comment --comment "submission" -j ACCEPT
-A FORWARD -s 10.0.0.3/32 -i eth1 -o eth0 -j ACCEPT
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

for some reason I can't make a connection to the external mail server from inside the lan. even from the 10.0.0.3 address which should be allowed to do anything.
everything used to work when i used MASQUERADing but stopped once i switched to SNAT. 
Can anybody help me? What am I doing wrong??

Thanks

             reply	other threads:[~2012-03-08 15:16 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-08 15:16 nullv [this message]
2012-03-08 17:29 ` IPTable Rules... again Andrew Beverley

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