Source port of SIP UDP request gets translated regardless of source port setting 'preserve strict'
Hi Guys, I configured a SIP (UDP) service on a 11.5.1 HF3 LTM at a customer site. A SIP profile is bound to the SIP Virtual Service. The LTM ist set up in the L3 Path. Most of the VS configuration ist default. What I see is, that the LTM translates the source port on the traffic from the LTM to the SIP server. The behaviour does not change if I configure 'preserve strict' on the source port setting in the VS: 09:47:50.418275 IP 1.1.1.1.sip > 1.1.2.1.sip: SIP, length: 452 (client to SIP VS on LTM) 09:47:50.418560 IP 1.1.1.1.25350 > 1.1.3.1.sip: SIP, length: 547 (forwarded request to SIP server) 09:47:50.424877 IP 1.1.3.1.sip > 1.1.1.1.25350: SIP, length: 378 (response from SIP server) 09:47:50.424927 IP 1.1.2.1.sip > 1.1.1.1.sip: SIP, length: 277 (response form LTM VS to client) Any ideas? Thanks, Rolf