SipCilentConnection port in Request-URI

Question

Hi All,
I want to register my J2ME based VoIP application (its using JSR180) to an IMS network.
P-CSCF for my IMS core network is listening on port 4060.
I am using GoSIP sample application (this is bundled with Java Wireless Toolkit). Some code snippet of my register method goes like this :
   *String proxyAddress = "pcscs.mydomain.com";*
   *String domainRealm = "mydomain.com";*
   *String myName = "shiv";*
   *String myIP = "172.21.60.100"*
                        *scc = (SipClientConnection)Connector.open("sip:" + proxyAddress + ":4060"); *// MARK 1**
                        *//scc = (SipClientConnection)Connector.open("sip:" + proxyAddress); *// MARK 2**
                        *scc.setListener(listener);*
                        *scc.initRequest("REGISTER", scn);*
   *//scc.setRequestURI("sip:"+domainRealm); *//MARK 3**
                        *String myContact = "<sip:" + myName + "@" + scn.getLocalAddress() + ":" + scn.getLocalPort() + ">";*
                        *String srvAddr =  "\"" + myDisplayName + "\"" + "<sip:" + myName + "@" + domainRealm + ":" + scn.getLocalPort()">";*
                        *scc.setHeader("Route", "<sip:pcscs.mydomain.com:4060>");*
   *scc.setHeader("Contact",myContact)*
                        *scc.setHeader("To", srvAddr);*
                        *scc.setHeader("From", srvAddr);*
                        *scc.setHeader("Content-Length", "0");*
                        *scc.setHeader("Max-Forwards", "20");*
                        *scc.send();*
P-CSCF is listening at port 4060 and when I use MARK 1 and comment MARK 2 and MARK 3 , following REGISTER request is generated and send to PCSCF at port 4060->
REGISTER sip:mydomain.com:4060 SIP/2.0
Call-ID: [email protected]
CSeq: 1 REGISTER
Via: SIP/2.0/UDP 172.21.60.100:9000;branch=z9hG4bKcd031d97c9093e29b6101d97c2cb344c
Route: <sip:pcscf.mydomain.com:4060>
Contact: <sip:[email protected]:9000>
To: "Shiv" <sip:[email protected]:9000>
From: "Shiv" <sip:[email protected]:9000>;tag=2059532475
Max-Forwards: 20
Content-Length: 0
but I want following REGISTER Message to be sent to PCSCF at port 4060 (without port 4060 in Request-URI) ->
REGISTER sip:mydomain.com SIP/2.0
Call-ID: [email protected]
CSeq: 1 REGISTER
Via: SIP/2.0/UDP 172.21.60.100:9000;branch=z9hG4bKcd031d97c9093e29b6101d97c2cb344c
Route: <sip:pcscf.mydomain.com:4060>
Contact: <sip:[email protected]:9000>
To: "Shiv" <sip:[email protected]:9000>
From: "Shiv" <sip:[email protected]:9000>;tag=2059532475
Max-Forwards: 20
Content-Length: 0
If I try to comment MARK 1 and uncomment MARK 2, then it send the above message to default port ie 5060 but I want to send the above message to port 4060 without port 4060 in Request-URI.
Any help is highly appreciated. Please let me know if you do not understand the problem.
Regards,
Shiv

Answer 1

After reading through this, I think this might be by design. The request is associated with DIP rather than VIP since it is
just been forwarded from the Load balancer. 
However, this would still mean that I need to keep 443 unused for my service to function normally. My service redirect users to live login page and it has to provide the VIP domainname port as redirect url in order to get the request. 
During local debugging, requests to url:port provided in Request.Url doesn't work. Overall this azure local debugging setup still is a mess. 
Let me know if there is any other workaround/fix.