[CentOS] iptables question

Ned Slider ned at unixmail.co.uk
Tue Aug 26 20:17:35 UTC 2008

Joseph L. Casale wrote:
>> My understanding is that --dport can only specify a single port (--dport
>> 80) or port range (--dport 137:139) inclusive. Use of the multiport
>> module allows up to 15 ports (or port ranges) to be specified.
> Ned,
> So to write --dport 5060,10000:60000 you need to write:
> -m multiport -p udp -dport 5060,10000:60000
> Correct?
> Thanks for the help!
> jlc

I've not used multiport so am unsure of the exact syntax, but that looks 

I'd keep the -m multiport and --dports together though (also note it's 
--dports, not -dport), so something like this:

iptables -A INPUT -p udp -m multiport --dports 5060,10000:60000 -j ACCEPT

would accept all UDP packets destined for ports 5060 and 10000-60000.

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