OPNsense Forum

Archive => 18.1 Legacy Series => Topic started by: overopn on June 04, 2018, 05:37:44 am

Title: 18.1.9 Static port does not work with RTSP server UDP mode
Post by: overopn on June 04, 2018, 05:37:44 am

Hi, I have RTSP server in my LAN. I can connect to it fine with TCP but not with UDP. I understand there is a source port rewrite which I must disable, however that is not working.

(https://filedn.com/l3TGy7Y83c247u0RDYa9fkp/temp/pfsense/opnsensenat2.jpg)

(https://filedn.com/l3TGy7Y83c247u0RDYa9fkp/temp/pfsense/opnsensenat3.jpg)

When I do a packet capture on WAN, I can see the TCP part going back but the UDP packets are going to a different (and wrong?) port.

(https://filedn.com/l3TGy7Y83c247u0RDYa9fkp/temp/pfsense/opnsensenat4.jpg)

Title: Re: 18.1.9 Static port does not work with RTSP server UDP mode
Post by: marjohn56 on June 04, 2018, 06:56:20 pm

Try splitting the rules, so have two rules, one for UDP  and one for TCP... should work as is, but it's a question of ruling things out... or in, as the case may be.

Title: Re: 18.1.9 Static port does not work with RTSP server UDP mode
Post by: overopn on June 09, 2018, 10:29:47 am

I tried pfsense and face the same issue, and I worked with an experienced pfsense guy and determine it is a bug with pfsense, and it does not happen with old pfsense 2.3

Seems opnsense have this bug too since they share same code base?

https://forum.netgate.com/topic/131765/nat-problem-with-rtcp-server

Title: Re: 18.1.9 Static port does not work with RTSP server UDP mode
Post by: marjohn56 on June 09, 2018, 11:07:16 am

The are both FreeBSD based, but the fork to Opnsense happened before pf 2.4 so it suggests an issue upstream.


Have a look at /tmp/rules.debug.. does that show the correct rule?