zarb-ml/mageia-discuss/2012-August/008637.html


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   <H1>[Mageia-discuss] Setting up a port forward</H1>
    <B>Olav Vitters</B> 
    <A HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20Setting%20up%20a%20port%20forward&In-Reply-To=%3C20120831120448.GA10504%40bkor.dhs.org%3E"
       TITLE="[Mageia-discuss] Setting up a port forward">olav at vitters.nl
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    <I>Fri Aug 31 14:04:48 CEST 2012</I>
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<PRE>On Fri, Aug 31, 2012 at 12:41:37PM +0100, Anne Wilson wrote:
&gt;<i> I need to set up ssh in such a way that it comes in on a high port,
</I>&gt;<i> say 5122 which is forwarded to 22 - or otherwise to have ssh listen on
</I>&gt;<i> 5122.  I assume this is beyond MCC, and will entail editing iptables.
</I>&gt;<i>  This is not something I'm familiar with.  Can someone please advise me?
</I>
I have in /etc/sysconfig/iptables:
# 1;3S
# Generated by iptables-save v1.3.3 on Wed Nov 16 17:30:45 2005
*nat
:<i>PREROUTING ACCEPT [0:0]
</I>:<i>POSTROUTING ACCEPT [0:0]
</I>:<i>OUTPUT ACCEPT [0:0]
</I>-A PREROUTING -i eth0 -p tcp -m tcp --dport 443 -j REDIRECT --to-ports 22
-A PREROUTING -i eth0 -p tcp -m tcp --dport 53 -j REDIRECT --to-ports 22
COMMIT
# Completed on Wed Nov 16 17:30:45 2005
# Generated by iptables-save v1.3.3 on Wed Nov 16 17:30:45 2005


or as iptables command:
iptables -t nat -A PREROUTING -i eth0 -p tcp -m tcp \
         --dport 443 -j REDIRECT --to-ports 22

that redirect tcp port 443 to 22 (loads of proxies allow you to CONNECT
to 443, but not to 22).

-- 
Regards,
Olav
</PRE>


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