Hi Brian, Did you try using the REDIRECT target instead? Best, Jesus -----Original Message----- From: netfilter-owner@xxxxxxxxxxxxxxx [mailto:netfilter-owner@xxxxxxxxxxxxxxx] On Behalf Of Brian J. Murrell Sent: 04 December 2016 21:07 To: netfilter@xxxxxxxxxxxxxxx Subject: Re: DNAT working for one host but not another On Sun, 2016-12-04 at 14:01 -0500, Brian J. Murrell wrote: > I have a DNAT rule on a host who's purpose is to redirect traffic that > is destined for port 23768 to port 5060 on that host: I should add, that what is going back to the 10.75.23.212 host is also wrong: 14:04:53.723018 IP 10.75.23.212.6060 > 10.75.22.8.23768: UDP, length 0 14:04:53.877539 IP 10.75.22.8.5060 > 10.75.23.212.6060: SIP, length: 555 14:04:53.910351 IP 10.75.23.212.6060 > 10.75.22.8.23768: UDP, length 472 14:04:53.912158 IP 10.75.22.8.5060 > 10.75.23.212.6060: SIP, length: 555 As you can see, what is being returned is not having it's port un- natted back to 23768. But that is perhaps unsurprising given that the connection never gets to ASSURED. Cheers, b. ��.n��������+%������w��{.n����z���)��jg��������ݢj����G�������j:+v���w�m������w�������h�����٥