[Serusers] Calls from UAs behind NAT getting a 503 error...

Kyriakos tank30 at hotmail.com
Wed Nov 9 13:28:41 CET 2005 

Just wanted to add that I also get the warning:   I wont send a reply for 
ACK.
I guess that means ACK from UA behind NAT dont reach the pstn gw?

thanks,
Kyriakos


----- Original Message ----- 
From: "KM" <tank30 at hotmail.com>
To: <serusers at lists.iptel.org>
Sent: Wednesday, November 09, 2005 11:38 AM
Subject: [Serusers] Calls from UAs behind NAT getting a 503 error...


> Hi,
> calls from a UA that is on public ip go through the pstn gw and terminate 
> ok.
> Calls from behind NAT get a 503 error from the GW when the INVITE message 
> is sent from SER.
>
> The invite messages for both cases are the same except from the VIA header 
> which for the latter one contains the private ip of the UA.
> Contact header is ok.
> Could that be the reason that im getting calls rejected?
> Is there a way to rewrite the VIA header?
>
>
>
> Im including the configuration file i have and some packet dumps of the 
> calls.Thanks!
>
> debug=3
> fork=no
> log_stderror=yes
> listen=213.207.***.*** # put your server IP address here
> port=5060
> children=8
> dns=no
> rev_dns=no
> fifo="/tmp/ser_fifo"
> fifo_db_url="mysql://ser:********@localhost/ser"
>
> #KM added module
> loadmodule "/usr/lib/ser/modules/exec.so"
> loadmodule "/usr/lib/ser/modules/mysql.so"
> loadmodule "/usr/lib/ser/modules/sl.so"
> loadmodule "/usr/lib/ser/modules/tm.so"
> loadmodule "/usr/lib/ser/modules/rr.so"
> loadmodule "/usr/lib/ser/modules/maxfwd.so"
> loadmodule "/usr/lib/ser/modules/usrloc.so"
> loadmodule "/usr/lib/ser/modules/registrar.so"
> loadmodule "/usr/lib/ser/modules/auth.so"
> loadmodule "/usr/lib/ser/modules/auth_db.so"
> loadmodule "/usr/lib/ser/modules/uri.so"
> loadmodule "/usr/lib/ser/modules/uri_db.so"
> loadmodule "/usr/lib/ser/modules/mediaproxy.so"
> loadmodule "/usr/lib/ser/modules/nathelper.so"
> loadmodule "/usr/lib/ser/modules/textops.so"
> loadmodule "/usr/lib/ser/modules/avpops.so"
> loadmodule "/usr/lib/ser/modules/domain.so"
> loadmodule "/usr/lib/ser/modules/permissions.so"
>
> modparam("auth_db|permissions|uri_db|usrloc",
> "db_url", "mysql://ser:heslo@localhost/ser")
> modparam("auth_db", "calculate_ha1", 1)
> modparam("auth_db", "password_column", "password")
> modparam("nathelper", "rtpproxy_disable", 1)
> modparam("nathelper", "natping_interval", 0)
> modparam("mediaproxy","natping_interval", 30)
> modparam("mediaproxy","mediaproxy_socket", "/var/run/mediaproxy.sock")
> modparam("mediaproxy","sip_asymmetrics","/usr/etc/ser/sip-clients")
> modparam("mediaproxy","rtp_asymmetrics","/usr/etc/ser/rtp-clients")
> modparam("usrloc", "db_mode", 2)
> modparam("registrar", "nat_flag", 6)
> modparam("rr", "enable_full_lr", 1)
> #pstn part-----------------------------------------
> modparam("tm", "fr_inv_timer", 27)
> modparam("tm", "fr_inv_timer_avp", "inv_timeout")
> modparam("permissions", "db_mode", 1)
> modparam("permissions", "trusted_table", "trusted")
>
> route {
> # -----------------------------------------------------------------
> # Sanity Check Section
> # -----------------------------------------------------------------
> if (!mf_process_maxfwd_header("10")) {
> sl_send_reply("483", "Too Many Hops");
> break;
> };
> if (msg:len > max_len) {
> sl_send_reply("513", "Message Overflow");
> break;
> };
> # -----------------------------------------------------------------
> # Record Route Section
> # -----------------------------------------------------------------
> if (method=="INVITE" && client_nat_test("3")) {
> # INSERT YOUR IP ADDRESS HERE
> record_route_preset("213.207.***.***:5060;nat=yes");
> } else if (method!="REGISTER") {
> record_route();
> };
> # -----------------------------------------------------------------
> # Call Tear Down Section
> # -----------------------------------------------------------------
> if (method=="BYE" || method=="CANCEL") {
> end_media_session();
> };
> # -----------------------------------------------------------------
> # Loose Route Section
> # -----------------------------------------------------------------
> if (loose_route()) {
> if (has_totag() && (method=="INVITE" || method=="ACK")) {
> if (client_nat_test("3") || search("^Route:.*;nat=yes")) {
> setflag(6);
> use_media_proxy();
> #log(1,"route:NATED caller in loose route \n");
> };
> };
> route(1);
> break;
> };
> # -----------------------------------------------------------------
> # Call Type Processing Section
> # -----------------------------------------------------------------
> #Check if the target domain is one that the server is responsible for
> if (!is_uri_host_local()) {
> log(1,"Call type processing: Target domain is not in the domain pool \n");
> #Check to see if the sender is in our own domain and allow messages from 
> pstn,pgw
> if (is_from_local() || allow_trusted()) {
> log(1,"Call type processing: Caller is local or trusted \n");
> route(4);
> route(1);
> } else {
> log(1,"Call type processing: 403 error \n");
> sl_send_reply("403", "Forbidden");
> };
> break;
> };
> if (method=="CANCEL") {
> route(1);
> break;
> } else if (method=="INVITE") {
> route(3);
> break;
> } else if (method=="REGISTER") {
> route(2);
> break;
> };
> lookup("aliases");
> if (uri!=myself) {
> route(4);
> route(1);
> break;
> };
> if (!lookup("location")) {
> sl_send_reply("404", "User Not Found");
> break;
> };
> route(1);
> }
> route[1] {
> # -----------------------------------------------------------------
> # Default Message Handler
> # -----------------------------------------------------------------
> t_on_reply("1");
> if (!t_relay()) {
> if (method=="INVITE" || method=="ACK") {
> end_media_session();
> };
> sl_reply_error();
> };
> }
> route[2] {
> # -----------------------------------------------------------------
> # REGISTER Message Handler
> # ----------------------------------------------------------------
> sl_send_reply("100", "Trying");
> if (!search("^Contact:[ ]*\*") && client_nat_test("7")) {
> setflag(6);
> fix_nated_register();
> force_rport();
> };
> if (!www_authorize("","subscriber")) {
> www_challenge("","0");
> break;
> };
> if (!check_to()) {
> sl_send_reply("401", "Unauthorized");
> break;
> };
> consume_credentials();
> if (!save("location")) {
> sl_reply_error();
> };
> }
> route[3] {
> # -----------------------------------------------------------------
> # INVITE Message Handler
> # -----------------------------------------------------------------
> log (1,"------------route[3]:INVITE handler \n");
> #if (allow_trusted()) {log(1,"------------route[3]:User is trusted\n");} ;
> #check if NATed caller
> if (!search("^Contact:[ ]*\*") && client_nat_test("7")) {
> log (1,"------------route[3]:fixing NAT info \n");
> setflag(6);
> force_rport();
> fix_nated_contact();
> };
> if (!allow_trusted()) {
> if (!proxy_authorize("","subscriber")) {
> #log (1,"route[3]:User did not authorise! \n");
> proxy_challenge("","1");
> #log (1,"route[3]:Sent error 401");
> break;
> } else if (!check_from()) {
> log (1,"route[3]: 403 error \n");
> sl_send_reply("403", "Use From=ID");
> break;
> };
> log (1,"route[3]:Consuming credentials.....\n");
> consume_credentials();
> };
> if (client_nat_test("3")) {
> setflag(7);
> force_rport();
> };
> #Strip prefix 00357 , 357
> if (uri=~"^sip:00357[0-9]{8}@") {
> strip(5);
> }
> else if ( uri=~"^sip:357[0-9]{8}@") {
> strip(3);
> };
> lookup("aliases");
> if (uri!=myself) {
> route(4);
> route(1);
> break;
> };
> if (uri=~"^sip:00[1-9]*@") { # International PSTN 00*
> route(4);
> route(5);
> break;
> };
> if (!lookup("location")) {
> if (uri=~"^sip:[0-9]{8}@") { # Domestic PSTN 2???????
> route(4);
> route(5);
> break;
> };
> sl_send_reply("404", "User Not Found");
> break;
> };
> route(4);
> route(1);
> }
> route[4] {
> # -----------------------------------------------------------------
> # NAT Traversal Section
> # -----------------------------------------------------------------
> if (isflagset(6) || isflagset(7)) {
> use_media_proxy();
> };
> }
> route[5] {
> # -----------------------------------------------------------------
> # PSTN Handler
> # -----------------------------------------------------------------
> #Change the destination so it points to PGW
> rewritehost("213.207.***.***"); # INSERT YOUR PSTN GATEWAY IP ADDRESS
> avp_write("i:45", "inv_timeout");
> route(4);
> route(1);
> }
>
>
> onreply_route[1] {
> if ((isflagset(6) || isflagset(7)) && (status=~"(180)|(183)|2[0-9][0-9]")) 
> {
> if (!search("^Content-Length:[ ]*0")) {
> use_media_proxy();
> };
> };
> if (client_nat_test("1")) {
> fix_nated_contact();
> };
> }
>
>
>
>
> ====================================================================================================
> Packets for failed call behind NAT:
> ====================================================================================================
>
> ΤΓ²΅&#0;&#0;&#0;&#0;&#0;&#0;&#0;&#0;&#0;&#0;??&#0;&#0;&#0;&#0;&#0;
> ½qC~ΐ
> &#0;ζ&#0;&#0;ζ&#0;&#0;&#0;ώ-Bΰ&#0;LυE&#0;E&#0;Ψ&#0;D&#0;&#0;pΜΥύ²Υύ³ΔΔΔŠ&INVITE 
> sip:99389683 at 213.207.141.179 SIP/2.0
> Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE
> Max-Forwards: 70
> User-Agent: PA168S
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> Contact: <sip:22000002 at 192.168.1.6:5060>
> Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", 
> nonce="4371b5e37010200b061c47bdd2b9e553e3b7128a1", 
> uri="sip:99389683 at 213.207.141.179", qop=auth, nc=00000001, 
> cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5"
> CSeq: 2 INVITE
> Content-Type: application/sdp
> Content-Length: 292
> v=0
> o=22000002 80268421 80523176 IN IP4 192.168.1.6
> s=SIP CALL
> c=IN IP4 192.168.1.6
> t=0 0
> m=audio 11722 RTP/AVP 18 4 0 8 3 97
> a=rtpmap:18 G729/8000
> a=rtpmap:4 G723/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:3 GSM/8000
> a=rtpmap:97 telephone-event/8000
> a=fmtp:97 0-15
>
> ½qCw
> zzLυE&#0;ώ-Bΰ&#0;El&#0;?@&#0;@pγΥύ³Υύ²ΔΔXΙnSIP/2.0 100 trying --  
> your call is important to us
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE;rport=5060;received=213.207.141.178
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Server: Sip EXpress router (0.9.3 (i386/linux))
> Content-Length: 0
> Warning: 392 213.207.141.179:5060 "Noisy feedback tells: pid=8885 
> req_src_ip=213.207.141.178 req_src_port=5060 
> in_uri=sip:99389683 at 213.207.141.179 out_uri=sip:99389683 at 213.207.144.6 
> via_cnt==1"
>
> ½qCρ
> &#0;Δ&#0;&#0;Δ&#0;&#0;&#0;ΉR.Ÿ&#0;ώ-Bΰ&#0;E?&#0;Š@&#0;@mDΥύ³ΥϐΔΔΆΝ
> INVITE sip:99389683 at 213.207.144.6 SIP/2.0
> Record-Route: 
> <sip:99389683 at 213.207.141.179:5060;nat=yes;ftag=vW5KTCrnEpud7yyE;lr=on>
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> Max-Forwards: 16
> User-Agent: PA168S
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> Contact: <sip:22000002 at 213.207.141.178:5060>
> CSeq: 2 INVITE
> Content-Type: application/sdp
> Content-Length: 316
> v=0
> o=22000002 80268421 80523176 IN IP4 192.168.1.6
> s=SIP CALL
> c=IN IP4 213.207.141.179213.207.141.179
> t=0 0
> m=audio 3506435064 RTP/AVP 18 4 0 8 3 97
> a=rtpmap:18 G729/8000
> a=rtpmap:4 G723/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:3 GSM/8000
> a=rtpmap:97 telephone-event/8000
> a=fmtp:97 0-15
>
> ½qCy1
> Δ&#0;&#0;Δ&#0;&#0;&#0;ΉR.Ÿ&#0;ώ-Bΰ&#0;E?<@@mCΥύ³ΥϐΔΔΆΝ
> INVITE sip:99389683 at 213.207.144.6 SIP/2.0
> Record-Route: 
> <sip:99389683 at 213.207.141.179:5060;nat=yes;ftag=vW5KTCrnEpud7yyE;lr=on>
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> Max-Forwards: 16
> User-Agent: PA168S
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> Contact: <sip:22000002 at 213.207.141.178:5060>
> CSeq: 2 INVITE
> Content-Type: application/sdp
> Content-Length: 316
> v=0
> o=22000002 80268421 80523176 IN IP4 192.168.1.6
> s=SIP CALL
> c=IN IP4 213.207.141.179213.207.141.179
> t=0 0
> m=audio 3506435064 RTP/AVP 18 4 0 8 3 97
> a=rtpmap:18 G729/8000
> a=rtpmap:4 G723/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:3 GSM/8000
> a=rtpmap:97 telephone-event/8000
> a=fmtp:97 0-15
>
> ½qCh 
> ΄&#0;&#0;΄&#0;&#0;&#0;ώ-Bΰ&#0;ΉR.Ÿ&#0;E&#0;¦f~@&#0;ϋNoΥϐΥύ³ΔΔ'^ 
> SIP/2.0 100 Trying
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Content-Length: 0
>
> ½qCšο&#0;&#0;΄&#0;&#0;΄&#0;&#0;&#0;ώ-Bΰ&#0;ΉR.Ÿ&#0;E&#0;¦f@&#0;ϋNnΥϐΥύ³ΔΔ'^ 
> SIP/2.0 100 Trying
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Content-Length: 0
>
> ½qCΎΊ&#0;ξ&#0;&#0;ξ&#0;&#0;&#0;ώ-Bΰ&#0;ΉR.Ÿ&#0;E&#0;ΰf?@ϋN3ΥϐΥύ³ΔΔΜ"SIP/2.0 
> 503 Service Unavailable
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Contact: <sip:99389683 at 213.207.144.6:5060>
> Content-Length: 0
>
> ½qCe»""ΉR.Ÿ&#0;ώ-Bΰ&#0;E.&#0;Œ@&#0;@osΥύ³ΥϐΔΔqΚΫACK 
> sip:99389683 at 213.207.144.6 SIP/2.0
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bK6f55.cba0c054.0
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> CSeq: 2 ACK
> User-Agent: Sip EXpress router(0.9.3 (i386/linux))
> Content-Length: 0
>
> ½qC>»RRLυE&#0;ώ-Bΰ&#0;E @@q«Υύ³Υύ²ΔΔŒΘΆSIP/2.0 503 Service 
> Unavailable
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Contact: <sip:99389683 at 213.207.144.6:5060>
> Content-Length: 0
>
> ½qCnŒ&#0;?&#0;&#0;?&#0;&#0;&#0;ώ-Bΰ&#0;LυE&#0;E&#0;œ&#0;E&#0;&#0;r 
> Υύ²Υύ³ΔΔˆ"ACK sip:99389683 at 213.207.141.179 SIP/2.0
> Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE
> Max-Forwards: 70
> User-Agent: PA168S
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> Contact: <sip:22000002 at 192.168.1.6:5060>
> Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", 
> nonce="4371be370510200b061c47bdd2b9e553e3b7128a1", 
> uri="sip:99389683 at 213.207.141.179", qop=auth, nc=00000001, 
> cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5"
> CSeq: 2 ACK
> Content-Length: 0
>
> ½qCΕ8
> &#0;RRLυE&#0;ώ-Bΰ&#0;E &#0;Ž@&#0;@q?Υύ³Υύ²ΔΔŒΘΆSIP/2.0 503 
> Service Unavailable
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Contact: <sip:99389683 at 213.207.144.6:5060>
> Content-Length: 0
>
> ½qCγέ
> &#0;?&#0;&#0;?&#0;&#0;&#0;ώ-Bΰ&#0;LυE&#0;E&#0;œ&#0;F&#0;&#0;rΥύ²Υύ³ΔΔˆ"ACK 
> sip:99389683 at 213.207.141.179 SIP/2.0
> Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE
> Max-Forwards: 70
> User-Agent: PA168S
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> Contact: <sip:22000002 at 192.168.1.6:5060>
> Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", 
> nonce="4371be370105200b061c47bdd2b9e553e3b7128a1", 
> uri="sip:99389683 at 213.207.141.179", qop=auth, nc=00000001, 
> cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5"
> CSeq: 2 ACK
> Content-Length: 0
> ½qC3G
> RRLυE&#0;ώ-Bΰ&#0;E @@q©Υύ³Υύ²ΔΔŒΘΆSIP/2.0 503 Service 
> Unavailable
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Contact: <sip:99389683 at 213.207.144.6:5060>
> Content-Length: 0
> ½qC.κ
> &#0;?&#0;&#0;?&#0;&#0;&#0;ώ-Bΰ&#0;LυE&#0;E&#0;œ&#0;G&#0;&#0;rΥύ²Υύ³ΔΔˆ"ACK 
> sip:99389683 at 213.207.141.179 SIP/2.0
> Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE
> Max-Forwards: 70
> User-Agent: PA168S
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> Contact: <sip:22000002 at 192.168.1.6:5060>
> Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", 
> nonce="4371be370102005b061c47bdd2b9e553e3b7128a1", 
> uri="sip:99389683 at 213.207.141.179", qop=auth, nc=00000001, 
> cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5"
> CSeq: 2 ACK
> Content-Length: 0
> ½qCd
> RRLυE&#0;ώ-Bΰ&#0;E @@q¨Υύ³Υύ²ΔΔŒΘΆSIP/2.0 503 Service 
> Unavailable
> Via: SIP/2.0/UDP 
> 192.168.1.6:5060;rport=5060;received=213.207.141.178;branch=z9hG4bKfmqE9mAxO4AVb1rE
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> CSeq: 2 INVITE
> Contact: <sip:99389683 at 213.207.144.6:5060>
> Content-Length: 0
> ½qCA&#0;?&#0;&#0;?&#0;&#0;&#0;ώ-Bΰ&#0;LυE&#0;E&#0;œ&#0;H&#0;&#0;rΥύ²Υύ³ΔΔˆ"ACK 
> sip:99389683 at 213.207.141.179 SIP/2.0
> Via: SIP/2.0/UDP 192.168.1.6:5060;branch=z9hG4bKfmqE9mAxO4AVb1rE
> Max-Forwards: 70
> User-Agent: PA168S
> From: "22000002" <sip:22000002 at 213.207.141.179>;tag=vW5KTCrnEpud7yyE
> To: "99389683" <sip:99389683 at 213.207.141.179>;tag=1367353431
> Call-ID: Ra1xPN5naYXRZN67 at 192.168.1.6
> Contact: <sip:22000002 at 192.168.1.6:5060>
> Proxy-Authorization: Digest username="22000002", realm="213.207.141.179", 
> nonce="4371be370102005b061c47bdd2b9e553e3b7128a1", 
> uri="sip:99389683 at 213.207.141.179", qop=auth, nc=00000001, 
> cnonce="0a4f113b", response="805a849373492c421c9397d1621239b5"
> CSeq: 2 ACK
> Content-Length: 0
>
>
>
>
>
>
>
> ====================================================================================================
> Packets for successful call from public IP:
> ====================================================================================================
> ΤΓ²΅&#0;&#0;&#0;&#0;&#0;&#0;&#0;&#0;&#0;&#0;??&#0;&#0;&#0;&#0;&#0;½qCjlΏ&#0;&#0;Ώ&#0;&#0;&#0;ώ-Bΰ&#0;ΪβΗ&#0;Eh±%*ϊΟ΅Υύ?Υύ³ΔĝίINVITE 
> sip:22372673 at 213.207.141.179 SIP/2.0
>
> Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
>
> From: Kyriakos <sip:22000001 at 213.207.141.179>;tag=2f2e13766c08ee3ao0
>
> To: <sip:22372673 at 213.207.141.179>
>
> Call-ID: fa843926-7b99844a at 213.207.141.181
>
> CSeq: 102 INVITE
>
> Max-Forwards: 70
>
> Proxy-Authorization: Digest 
> username="22000001",realm="213.207.141.179",nonce="4371be42f095d84938c2b65fb9b1d879749453b6e",uri="sip:22372673 at 213.207.141.179",algorithm=MD5,response="cf863bab65ffbaf6376746eb76cd127c",qop=auth,nc=00000001,cnonce="32d92d6b"
>
> Contact: Kyriakos <sip:22000001 at 213.207.141.181:5060>
>
> Expires: 240
>
> User-Agent: Sipura/SPA841-3.1.1(a)
>
> Content-Length: 403
>
> Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
>
> Content-Type: application/sdp
>
> v=0
>
> o=- 8038585 8038585 IN IP4 213.207.141.181
>
> s=-
>
> c=IN IP4 213.207.141.181
>
> t=0 0
>
> m=audio 16460 RTP/AVP 0 2 4 8 18 96 97 98 101
>
> a=rtpmap:0 PCMU/8000
>
> a=rtpmap:2 G726-32/8000
>
> a=rtpmap:4 G723/8000
>
> a=rtpmap:8 PCMA/8000
>
> a=rtpmap:18 G729a/8000
>
> a=rtpmap:96 G726-40/8000
>
> a=rtpmap:97 G726-24/8000
>
> a=rtpmap:98 G726-16/8000
>
> a=rtpmap:101 telephone-event/8000
>
> a=fmtp:101 0-15
>
> a=ptime:30
>
> a=sendrecv
>
> ½qCoOOΪβΗ&#0;ώ-Bΰ&#0;EA&#0;'@&#0;@qΥύ³Υύ?ΔΔ-ΙFSIP/2.0 100 
> trying -- your call is important to us
>
> Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
>
> From: Kyriakos <sip:22000001 at 213.207.141.179>;tag=2f2e13766c08ee3ao0
>
> To: <sip:22372673 at 213.207.141.179>
>
> Call-ID: fa843926-7b99844a at 213.207.141.181
>
> CSeq: 102 INVITE
>
> Server: Sip EXpress router (0.9.3 (i386/linux))
>
> Content-Length: 0
>
> Warning: 392 213.207.141.179:5060 "Noisy feedback tells: pid=8885 
> req_src_ip=213.207.141.181 req_src_port=5060 
> in_uri=sip:22372673 at 213.207.141.179 out_uri=sip:22372673 at 213.207.144.6 
> via_cnt==1"
>
> ½qC[oAAΉR.Ÿ&#0;ώ-Bΰ&#0;E3&#0;"@&#0;@lΎΥύ³ΥϐΔΔΝ?INVITE 
> sip:22372673 at 213.207.144.6 SIP/2.0
>
> Record-Route: <sip:213.207.141.179;ftag=2f2e13766c08ee3ao0;lr=on>
>
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bKc56.673dbf01.0
>
> Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
>
> From: Kyriakos <sip:22000001 at 213.207.141.179>;tag=2f2e13766c08ee3ao0
>
> To: <sip:22372673 at 213.207.141.179>
>
> Call-ID: fa843926-7b99844a at 213.207.141.181
>
> CSeq: 102 INVITE
>
> Max-Forwards: 16
>
> Contact: Kyriakos <sip:22000001 at 213.207.141.181:5060>
>
> Expires: 240
>
> User-Agent: Sipura/SPA841-3.1.1(a)
>
> Content-Length: 403
>
> Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
>
> Content-Type: application/sdp
>
> v=0
>
> o=- 8038585 8038585 IN IP4 213.207.141.181
>
> s=-
>
> c=IN IP4 213.207.141.181
>
> t=0 0
>
> m=audio 16460 RTP/AVP 0 2 4 8 18 96 97 98 101
>
> a=rtpmap:0 PCMU/8000
>
> a=rtpmap:2 G726-32/8000
>
> a=rtpmap:4 G723/8000
>
> a=rtpmap:8 PCMA/8000
>
> a=rtpmap:18 G729a/8000
>
> a=rtpmap:96 G726-40/8000
>
> a=rtpmap:97 G726-24/8000
>
> a=rtpmap:98 G726-16/8000
>
> a=rtpmap:101 telephone-event/8000
>
> a=fmtp:101 0-15
>
> a=ptime:30
>
> a=sendrecv
>
> ½qCΏα&#0;ˆ&#0;&#0;ˆ&#0;&#0;&#0;ώ-Bΰ&#0;ΉR.Ÿ&#0;E&#0;zf@&#0;ϋN˜ΥϐΥύ³ΔΔf"QSIP/2.0 
> 100 Trying
>
> Via: SIP/2.0/UDP 213.207.141.179;branch=z9hG4bKc56.673dbf01.0
>
> Via: SIP/2.0/UDP 213.207.141.181:5060;branch=z9hG4bK-896914ce
>
> From: Kyriakos <sip:22000001 at 213.207.141.179>;tag=2f2e13766c08ee3ao0
>
> To: <sip:22372673 at 213.207.141.179>;tag=1367353431
>
> Call-ID: fa843926-7b99844a at 213.207.141.181
>
> CSeq: 102 INVITE
>
> Content-Length: 0
>
>
>
> _______________________________________________
> Serusers mailing list
> serusers at lists.iptel.org
> http://lists.iptel.org/mailman/listinfo/serusers
>

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