[SIPForum-discussion] Phantom Calls on ATA

Jorge jwalcantara at hotmail.com
Tue Oct 15 22:52:40 UTC 2013

There are many types of ATAs, what kind are you having problems with?


You may be able to set an ACL in the ATA or Router to only allow your SBC or
you gateways IP address on  port 5060, if  this is the signaling port you
are using.


But this only helps if the vandals do not know your source address, because
if they know it they may spoof you address.


Sounds like someone that knows your set up is exploiting you ATAs.


Good Luck,





From: discussion-bounces at sipforum.org
[mailto:discussion-bounces at sipforum.org] On Behalf Of Antonieta Lobo
Sent: Monday, October 14, 2013 11:18 PM
To: discussion at sipforum.org; discussion at sipforum.org
Subject: [SIPForum-discussion] Phantom Calls on ATA


Hi there,

We are receiving attacks on our customers ATAs, they receive a direct call
from unknown source, and the ringing doesnt end until the client pick up.
Which parameter we can adjust on ATA to solve this problem. The solution
that i think is that the ATA doesn`t response these invites, but i dont know
where we can adjust that.


Best Regards


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