From: Hanasaki JiJi <hanasaki@hanaden.com>
To: Linux - LIST <linux-kernel@vger.kernel.org>
Subject: iptables NAT entry times out but connects from firewall
Date: Mon, 28 Apr 2003 12:57:16 -0500 [thread overview]
Message-ID: <3EAD6B7C.4090108@hanaden.com> (raw)
There is a firewall with two NICs and the below rule to allow an
internal host to connect out to smtp servers on the internet. Some
hosts have a connection timeout on a connect from $INTERNAL_IP_OF_SMTP
yet connect from the firewall just fine.
iptables -t nat -A POSTROUTING -p tcp -o $NIC_EXTERNAL \
--dport 25 -s $INTERNAL_IP_OF_SMTP -j MASQUERADE
ex:
on firewall:
telnet csoc-mail-msfc.csoconline.com 25
above connects ok
on $INTERNAL_IP_OF_SMTP
telnet csoc-mail-msfc.csoconline.com 25
connection times out
next reply other threads:[~2003-04-28 17:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-28 17:57 Hanasaki JiJi [this message]
2003-04-29 19:07 ` iptables NAT entry times out but connects from firewall Harald Welte
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