[Freeswitch-users] Wrong response SIP port

I have external profile on port 5080. When FS get INVITE on 5080 from remote 5060 port, FS response on 5080 port too instead 5060 20.20.20.20 - fs 10.10.10.10 - remote sip 18:23:49.675349 IP 10.10.10.10.5060 > 20.20.20.20.5080: SIP: INVITE sip:7001@20.20.20.20:5080;user=phone SIP/2.0 18:23:49.678953 IP 20.20.20.20.5080 > 10.10.10.10.5080: UDP, length 363 How to fix whis? FS should response on originate udp port.