From: Eray Aslan <eray.aslan@caf.com.tr>
To: netfilter@vger.kernel.org
Subject: Re: Ipsec/L2tp with NETKEY
Date: Sat, 04 Jul 2009 07:14:56 +0300 [thread overview]
Message-ID: <4A4ED740.9050104@caf.com.tr> (raw)
In-Reply-To: <1246666906.5753.31.camel@localhost>
On 04.07.2009 03:21, Martin wrote:
[...]
> Here is a diagram, just for fun ;)
>
> MS-client ==== /ext interface/ Linux GW /internal interface/ ==== LAN
>
>
> What I see is that user completes ipsec auth, and then tries to connect
> to the l2tpd's port (7101) on the external interface, and then I must
> accept connections in that port, or the vpn connection fails.
>
>
> Any suggestions how to let connections on udp 1701 only to connections
> before authenticated by ipsec?
On the openswan machine, mark the ESP packets and accept only marked
packets to l2tpd daemon:
# iptables -t mangle -A PREROUTING -i $EXT_INT -p 50 -j MARK --set-mark 1
# iptables -A INPUT -i $EX_INT -m mark --mark 1 -j ACCEPT
# iptables -A INPUT -i $EX_INT -p udp --dport 1701 -j DROP
--
Eray
next prev parent reply other threads:[~2009-07-04 4:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-04 0:21 Ipsec/L2tp with NETKEY Martin
2009-07-04 4:14 ` Eray Aslan [this message]
[not found] ` <114b7d1a0907052027y1204f945s4d9b5ea7032d6b13@mail.gmail.com>
2009-07-06 7:04 ` Eray Aslan
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