From: Vigneswaran R <vignesh@atc.tcs.com>
To: Manu <traqueur@club-internet.fr>
Cc: netfilter@vger.kernel.org
Subject: Re: PREROUTING to a non local subnet
Date: Mon, 16 Sep 2013 14:53:02 +0530 [thread overview]
Message-ID: <5236CDF6.3080802@atc.tcs.com> (raw)
In-Reply-To: <522DDC72.4000402@club-internet.fr>
On 09/09/2013 08:04 PM, Manu wrote:
> Hello
>
> I'm running iptable v1.4.7 on a linux with two NIC.
> One has adress 192.168.1.31 (the lan)
> The other has a public IP. Let's say 180.180.180.180
>
> On the lan, I have a VPN which join two network : 192.168.1.0 and
> 192.168.2.0
>
> I'm trying to forward 5900 port (vnc) to a computer which is on the
> second subnet with adress 192.168.2.100
> iptables -A PREROUTING -t nat -p tcp -i eth1 --dport 5900 -j DNAT
> --to-destination 192.168.2.100:5900
> iptables -A FORWARD -p tcp -d 192.168.2.100--dport 5900 -j ACCEPT
> and it doesn't work
Does this machine have route to 192.168.2.0 network? Try to use tcpdump
and see where the traffic is being dropped.
Regards,
Vignesh
>
> I've tried the same on the local network with adress 192.168.1.99
> iptables -A PREROUTING -t nat -p tcp -i eth1 --dport 5900 -j DNAT
> --to-destination 192.168.1.99:5900
> iptables -A FORWARD -p tcp -d 192.168.1.99--dport 5900 -j ACCEPT
> and it's working like a charm
>
> I've done my test with another computer with public adress
> 200.200.200.200
>
> I've done a netstat one the two computers
> on 192.168.2.100 i've seen he's talking to 180.180.180.180 (<-- my
> server running iptable)
> on 192.168.1.99 i've seen he's talking to 200.200.200.200 (<-- the
> computer on internet which i'm running my test from)
>
> thanks for your attention
> --
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>
next prev parent reply other threads:[~2013-09-16 9:23 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-09 14:34 PREROUTING to a non local subnet Manu
2013-09-16 7:26 ` Manu
2013-09-16 21:08 ` Humberto Jucá
2013-09-16 9:23 ` Vigneswaran R [this message]
[not found] ` <5236FAB3.2000401@club-internet.fr>
2013-09-17 4:40 ` Vigneswaran R
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