[asterisk-dev] Asterisk 16. PJSIP. INVITE. "Contact" field and FQDN

Tue Oct 30 03:05:39 CDT 2018

Thank. it has been configured:
$ cat /etc/asterisk/pjsip.conf | grep -i "external"
external_media_address=11.22.33.44
external_signaling_address=11.22.33.44

As a result - in the "Contact" field of the request "INVITE" is indicated IP ddress and not FQDN:
Contact: <sip:XXYYZZ at 11.22.33.44:5061;transport=TLS>

It is necessary for me that instead of IP Address there was a FQDN, example:
Contact: <sip:XXYYZZ at ast.firma.org:5061;transport=TLS>

How i can do this ?
Where in the source code to make a change?

Serg

________________________________
From: asterisk-dev <asterisk-dev-bounces at lists.digium.com> on behalf of Mani Kanta Gadde <manikanta.gadde at zemosolabs.com>
Sent: Tuesday, October 30, 2018 8:03
To: asterisk-dev at lists.digium.com
Subject: Re: [asterisk-dev] Asterisk 16. PJSIP. INVITE. "Contact" field and FQDN

Use the external_media_address and external_signalling_address in PJSIP in general section.

These variables will explicitly put the required IP in SIP messages, so that other SIP phone/VoIP server know where to reply.

Thanks & Regards
Manikanta

On Tue, Oct 30, 2018 at 10:08 AM KoltogyanU2 SergeyU2 <u2 at amintegrator.com<mailto:u2 at amintegrator.com>> wrote:

PJSIP . How to force use FQDN in the "Contact" field ( INVITE) ?

In the INVITE the "Contact" field looks like this:
Contact: <sip:XXYYZZ at 11.22.33.44:5061;transport=TLS>

How to reconfigure Asterisk, or where in the source code to make a change, so that the "Contact" always use FQDN =ast.firma.org<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fast.firma.org&data=02%7C01%7Cu2%40amintegrator.com%7C560fe46fc314491f9bc508d63e2d6727%7C806bcdf8cdfb4595995e80fbcae20097%7C0%7C0%7C636764762056891576&sdata=SXju69fIhpTARkNrterbLYhzdN5KeIC8lFMhILQhOFM%3D&reserved=0>  and looked like this:
Contact: <sip:XXYYZZ at ast.firma.org:5061;transport=TLS>

?

Description of the problem:
Asterisk 16 (use PJSIP. asterisk build with:
./configure --with-pjproject-bundled  -sysconfdir=/etc --libdir=/usr/lib64
)

Asterisk sends a INVITE to the sip.pstnhub.microsoft.com<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsip.pstnhub.microsoft.com&data=02%7C01%7Cu2%40amintegrator.com%7C560fe46fc314491f9bc508d63e2d6727%7C806bcdf8cdfb4595995e80fbcae20097%7C0%7C0%7C636764762056891576&sdata=T0%2FsRAuJEOFdq6tTqbOIWYTLCIXyDTF8sP9LwRj85KQ%3D&reserved=0> in this form:
<--- Transmitting SIP request (806 bytes) to TLS:52.114.75.24:5061<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2F52.114.75.24%3A5061&data=02%7C01%7Cu2%40amintegrator.com%7C560fe46fc314491f9bc508d63e2d6727%7C806bcdf8cdfb4595995e80fbcae20097%7C0%7C0%7C636764762056891576&sdata=k5BOHpk7%2B9a%2Fo%2BE6%2ByRQ%2FPKz3sJ6p1xPJACDiLAni4c%3D&reserved=0> --->
INVITE sip:+380770081 at sip.pstnhub.microsoft.com:5061<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fsip%3A%2B380770081%40sip.pstnhub.microsoft.com%3A5061&data=02%7C01%7Cu2%40amintegrator.com%7C560fe46fc314491f9bc508d63e2d6727%7C806bcdf8cdfb4595995e80fbcae20097%7C0%7C0%7C636764762056891576&sdata=kiay5u7zJuMB2rYSG5ytHwCeJZZd8g3IEARPBCrOa5E%3D&reserved=0> SIP/2.0
Via: SIP/2.0/TLS 11.22.33.44:5061;rport;branch=z9hG4bKPjd2417f6c-8788-4d40-b666-3244b903d886;alias
From: <sip:6001 at ast.firma.org<mailto:sip%3A6001 at ast.firma.org>>;tag=9912223a-ff74-4ba6-8a0f-c3225e70eaba
To: <sip:+380770081 at sip.pstnhub.microsoft.com<mailto:sip%3A%2B380770081 at sip.pstnhub.microsoft.com>>
Contact: <sip:XXYYZZ at 11.22.33.44:5061;transport=TLS>
Call-ID: ee581ee7-e624-41cb-a486-b06cf233c63c
CSeq: 19204 INVITE
Allow: OPTIONS, REGISTER, SUBSCRIBE, NOTIFY, PUBLISH, INVITE, ACK, BYE, CANCEL, UPDATE, PRACK, MESSAGE, REFER
Supported: 100rel, timer, replaces, norefersub
Session-Expires: 1800
Min-SE: 90
Max-Forwards: 70
User-Agent: Asterisk PBX 16.0.0
Content-Type: application/sdp
Content-Length:    92

v=0
o=- 233177990 233177990 IN IP4 11.22.33.44
s=Asterisk
c=IN IP4 40.127.205.7
t=0 0

Where 11.22.33.44 - Asterisk public IP Address ( Asterisk over NAT ):
Asterisk(172.18.1.16)--->NAT(11.22.33.44)---->ISP

In the INVITE the "Contact" field looks like this:
Contact: <sip:XXYYZZ at 11.22.33.44:5061;transport=TLS>

How to reconfigure Asterisk, or where in the source code to make a change,
so that the "Contact" always use FQDN =ast.firma.org<https://emea01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fast.firma.org&data=02%7C01%7Cu2%40amintegrator.com%7C560fe46fc314491f9bc508d63e2d6727%7C806bcdf8cdfb4595995e80fbcae20097%7C0%7C0%7C636764762056891576&sdata=SXju69fIhpTARkNrterbLYhzdN5KeIC8lFMhILQhOFM%3D&reserved=0>  and looked like this:
Contact: <sip:XXYYZZ at ast.firma.org:5061;transport=TLS>

Serg
?

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