asterisk users - Jun 2013 - Asterisk sends the INTERNAL IP address of my equipments to my SIP friends?!?

Good morning, or Good afternoon! It depends :-)

I have a standard Asterisk configuration:

SIP friends (phones)    <----->    Asterisk    <----->    SIP
gateway to
PSTN converter
80.236.215.61                         109.69.217.6            internal IP (
10.4.0.10/255.255.255.0)

When analyzing traffic on a SIP friend/phone I see this:


INVITE sip:xxxx at 80.236.215.61:64946;ob SIP/2.0
Via: SIP/2.0/UDP 109.69.217.6:5060;branch=z9hG4bK52d50250;rport
Max-Forwards: 70
From: <sip:xxxx at 109.69.217.6>;tag=as15b47581
To: "test" <sip:xxxx at
109.69.217.6>;tag=kp1VwHD80rA9MVdBjTF4jyFIaCkrJcjh
Contact: <sip:xxxxx at 109.69.217.6>
Call-ID: MSMhw2bsheHWAQgHlae3O7yKQ2P9EcsM
CSeq: 102 INVITE
User-Agent: Asterisk
Require: timer
Session-Expires: 1800;refresher=uas
Min-SE: 90
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 217

v=0
o=root 664087974 664087976 IN IP4 10.4.0.10
s=Asterisk
c=IN IP4 10.4.0.10
t=0 0
m=audio 8652 RTP/AVP 8 101
a=rtpmap:8 PCMA/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=ptime:20
a=sendrecv


My equipement IP 10.4.0.10 is visible to the user, why?

Thank you,
Mickael
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You mean the SDP payload? You kind of need that....
c= is used for RTP transmission. o= always confuses
me so I will just say it's important at well.

You can put a proxy in the middle and do topology
hiding I guess however, that is beyond the scope of
this list?


Kind Regards,

Nick.

On 6/12/13, Mickael MONSIEUR <mickael.monsieur at gmail.com>
wrote:
> Good morning, or Good afternoon! It depends :-)
>
> I have a standard Asterisk configuration:
>
> SIP friends (phones)    <----->    Asterisk    <----->    SIP
gateway to
> PSTN converter
> 80.236.215.61                         109.69.217.6            internal IP (
> 10.4.0.10/255.255.255.0)
>
> When analyzing traffic on a SIP friend/phone I see this:
>
>
> INVITE sip:xxxx at 80.236.215.61:64946;ob SIP/2.0
> Via: SIP/2.0/UDP 109.69.217.6:5060;branch=z9hG4bK52d50250;rport
> Max-Forwards: 70
> From: <sip:xxxx at 109.69.217.6>;tag=as15b47581
> To: "test" <sip:xxxx at
109.69.217.6>;tag=kp1VwHD80rA9MVdBjTF4jyFIaCkrJcjh
> Contact: <sip:xxxxx at 109.69.217.6>
> Call-ID: MSMhw2bsheHWAQgHlae3O7yKQ2P9EcsM
> CSeq: 102 INVITE
> User-Agent: Asterisk
> Require: timer
> Session-Expires: 1800;refresher=uas
> Min-SE: 90
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
> Supported: replaces, timer
> Content-Type: application/sdp
> Content-Length: 217
>
> v=0
> o=root 664087974 664087976 IN IP4 10.4.0.10
> s=Asterisk
> c=IN IP4 10.4.0.10
> t=0 0
> m=audio 8652 RTP/AVP 8 101
> a=rtpmap:8 PCMA/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=ptime:20
> a=sendrecv
>
>
> My equipement IP 10.4.0.10 is visible to the user, why?
>
> Thank you,
> Mickael
>

Mickael MONSIEUR wrote:
>
> I have a standard Asterisk configuration:
>
> SIP friends (phones) <-----> Asterisk <-----> SIP gateway to
PSTN converter
> 80.236.215.61                109.69.217.6     internal IP (
10.4.0.10/255.255.255.0 )
>
> When analyzing traffic on a SIP friend/phone I see this:
>
> INVITE sip:xxxx at 80.236.215.61:64946;ob SIP/2.0
> Via: SIP/2.0/UDP 109.69.217.6:5060;branch=z9hG4bK52d50250;rport
> Max-Forwards: 70
> From: < sip:xxxx at 109.69.217.6 >;tag=as15b47581
> To: "test" < sip:xxxx at 109.69.217.6
>;tag=kp1VwHD80rA9MVdBjTF4jyFIaCkrJcjh
> Contact: < sip:xxxxx at 109.69.217.6 >
> Call-ID: MSMhw2bsheHWAQgHlae3O7yKQ2P9EcsM
> CSeq: 102 INVITE
> User-Agent: Asterisk
> Require: timer
> Session-Expires: 1800;refresher=uas
> Min-SE: 90
> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO
> Supported: replaces, timer
> Content-Type: application/sdp
> Content-Length: 217
>
> v=0
> o=root 664087974 664087976 IN IP4 10.4.0.10
> s=Asterisk
> c=IN IP4 10.4.0.10
> t=0 0
> m=audio 8652 RTP/AVP 8 101
> a=rtpmap:8 PCMA/8000
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=ptime:20
> a=sendrecv
>
> My equipement IP 10.4.0.10 is visible to the user, why?

Mickael,

What version of Asterisk are you running?

Is the Asterisk server outside and the SIP gateway to PSTN converter inside of a
NAT?

What are the NAT SUPPORT and MEDIA HANDLING settings in sip.conf?

Regards,

Matthew Roth
InterMedia Marketing Solutions
Software Engineer and Systems Developer