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how to reject INVITE from unknown sources
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sergeysi Offline
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Post: #1
how to reject INVITE from unknown sources
Is there a way to configure an IP-phone to reject INVITE messages from unknown sources and/or accept them only from servers at which a telephone is registered?

Here is an example of problem. We have a couple of phones with "white" external IP addresses. Script-kiddies find open 5060 UDP port and send INVITE messages, telephone rings. This is very annoying. We currently don't have possibility to put router/firewall before IP-phones. Is there a way to block INVITE messages which do not come from SIP-proxy?

I think it works on all phones but I tried to simulate it on T20P and T22P.
(This post was last modified: 10-07-2013 08:46 PM by sergeysi.)
10-07-2013 08:44 PM
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phlobot Offline
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RE: how to reject INVITE from unknown sources
I would be very interested in seeing a quick and dirty way of doing this, although it would be easy to lose control of the phone if you lose the IP. A domain based list would also be good.
(This post was last modified: 11-05-2013 10:37 PM by phlobot.)
11-05-2013 10:36 PM
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Yealink Support Offline
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Post: #3
RE: how to reject INVITE from unknown sources
Hi all,
Do you mean you just want the phone to accept the message only from PBX?
If you are using our latest T2X V71 firmware or V70 firmware, please use below auto provisioning parameter to enable this feature.
--------------------------
#!version:1.0.0.1
account.1.sip_trust_ctrl = 1
--------------------------
#account.1 means that it takes effect in account 1.
If you are using V61 or V60 firmware, please use this parameter:
--------------------------
[ account ]
path = /config/voip/sipAccount0.cfg
SIPTrustCtrl = 1
--------------------------
11-11-2013 05:22 PM
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gustavoy Offline
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RE: how to reject INVITE from unknown sources
How can you set this parameter on the web interface? Thanks
11-17-2013 11:02 PM
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Yealink Support Offline
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Post: #5
RE: how to reject INVITE from unknown sources
Hi gustavoy,

Sorry. There is not a option in the web page.
11-20-2013 04:56 PM
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tnorris3cxUser Offline
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Post: #6
RE: how to reject INVITE from unknown sources
(11-11-2013 05:22 PM)Yealink Support Wrote:  Hi all,
Do you mean you just want the phone to accept the message only from PBX?
If you are using our latest T2X V71 firmware or V70 firmware, please use below auto provisioning parameter to enable this feature.
--------------------------
#!version:1.0.0.1
account.1.sip_trust_ctrl = 1
--------------------------
#account.1 means that it takes effect in account 1.
If you are using V61 or V60 firmware, please use this parameter:
--------------------------
[ account ]
path = /config/voip/sipAccount0.cfg
SIPTrustCtrl = 1
--------------------------

Hi, I've been having problems with phantom calls too. I got with our vendor and he suggested this setting and a couple others. This does not work. I'm using this firmware 28.71.0.176 and I can still make my phone ring from sources other than our PBX.

Vendor is also suggesting a different brand phone that does have working trust settings, but I'd really prefer to have the Yealink T46 working.
08-28-2014 04:36 AM
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phlobot Offline
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Post: #7
RE: how to reject INVITE from unknown sources
(08-28-2014 04:36 AM)tnorris3cxUser Wrote:  Hi, I've been having problems with phantom calls too. I got with our vendor and he suggested this setting and a couple others. This does not work. I'm using this firmware 28.71.0.176 and I can still make my phone ring from sources other than our PBX.

Vendor is also suggesting a different brand phone that does have working trust settings, but I'd really prefer to have the Yealink T46 working.



My internal testing shows this works on v70, maybe it still works on V71+

It stops generic SIP scanners pretty effectively.

[ IPCall ]
path = /config/Features/Phone.cfg
IsAllowIPCall = 0
08-28-2014 05:06 AM
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