[OpenSIPS-Users] Proxy question

Travis Manson-Drake travism at simplybits.com
Mon Oct 19 17:41:17 CEST 2015

Hey Flavio!

Good to hear from you.

I checked to make sure my ALG was disabled, it is. I recall you telling me you had trouble with Mikrotiks before when I was in your bootcamp a few months ago.

However to answer your question.

All I’m really trying to do is have my Opensips Proxy hand all traffic off to the appropriate Asterisk PBX based on the auth_userID of a UAC.

The proxy will simply be acting as a stateful relay.

I have it working for the most part, but what seems to be stumping me is the Ip addr address sees the UAC behind is the FW in front of theProxy and not the ip address of the FW the UAC is behind

For example:

When I do a “sip show peer 7001context” in asterisk

Ip->addr will show the ip of the FW in front of my Opensips proxy and not the ip address of the FW in front of my UAC

The reason this is a problem is because we track the location of registered UAC’s based on the value of that ip address.

I was thinking of messing around with $si, but I don’t know where I would use it as I have no registration logic in my proxy.

If you like I can send you a copy of my opensips.cfg file?

Any help and or advice is incredibly appreciated!

Thank you very much for your time!

-Travis Manson

From: users-bounces at lists.opensips.org [mailto:users-bounces at lists.opensips.org] On Behalf Of Flavio Goncalves
Sent: Monday, October 19, 2015 5:30 AM
To: OpenSIPS users mailling list <users at lists.opensips.org>
Subject: Re: [OpenSIPS-Users] Proxy question

Hi Travis,

If I understood correctly, you want to balance registrations between Asterisk PBXs. In the latest versions, Asterisk has support for Path (RFC3327). By using this on your Asterisk and also on OpenSIPS you can send the address from where the request was received. Also check if your firewall does not have ALG (Application Layer Gateway) enabled, it can be changing your SIP headers, that's why you receive the firewall address instead of the source address.

Flavio E. Goncalves

2015-10-15 13:41 GMT-03:00 Travis Manson-Drake <travism at simplybits.com<mailto:travism at simplybits.com>>:
Hello All,

Hope you’re doing well!

I seem to be drawing a blank on this one, and I’m hoping someone out there may have an idea.

So here it is:

Essentially what’s happening:

I have a phone in a remote location that’s outside of my network

The phone is pointed to my opensips proxy

Once the request comes in the proxy does some sql queries to find out what PBX the phone should register to

Once the phone has registered with the correct Asterisk PBX everything works great.

However, I seem to be having an issure in which after its registered with Asterisk the Ip address asterisk has on record when I do a “sip show peer 7001XXXXX” is the public IP of the firewall the Sip proxy is behind. And not the ip address of the FW the phone is behind.

This is a bit of a problem as we use the Public IP to determine Location of Phones etc etc.

I was thinking of doing something with $si and $avp variables, but nowhere in my logic do I handle registration request’s I simply Middle man the traffic and relay the request’s to the right PBX.

Does anyone have any suggestions on how I might force the source IP of where the UAC is registering into the packet asterisk receives as a Reg from address?

Any input is greatly appreciated!

As always thank you all for your time!

Travis Manson-Drake
Voice Systems Analyst L1
Simply Bits, LLC
Now You’re Thinkin’ Smart!
5225 N. Sabino Canyon Road
Tucson, AZ 85750
Phone: 520-545-0311
Fax: 520-545-7252
Support Hotline: 5205450333

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