iptables syntax

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# 1  
Old 06-13-2011
iptables syntax

Can someone help to explain what is --to-source in
the iptables rule below:

iptables -t nat -A POSTROUTING -s -o eth0 \
          -j SNAT --to-source

especially why the option has double dash (--)
is it a comment?


Last edited by pludi; 06-13-2011 at 09:31 AM..
# 2  
Old 06-13-2011
The double dash means it's a long option (more than 1 character), and since it's a SNAT target I'd say it rewrites the source address on outgoing traffic.
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