[VoiceOps] Issues with ISPs blocking SIP 5060 - 5061

J. Oquendo sil at infiltrated.net
Thu Nov 21 12:31:32 EST 2013

On Thu, 21 Nov 2013, Matt Yaklin wrote:

> Will tunneling the sip/rtp packets be more common in the near future
> for SIP phone providers?
> matt

>From the ITSP side (where we provide trunks). Tunnels would
be a nightmare, so they are a no-no. Now you're throwing
in too many variables (Aggressive, Main, set ups, different
equipment). Not to mention the overhead it would add to an

>From the Managed PBX side of the equation... NO, but before
I ramble on, define tunneling. Tunneling as in VPN? If the
concern is security, TLS is suitable from the managed PBX
side as we can firewall trusted CIDRs on the firewall to
prevent recording/tampering.

If you meant VPN tunneling... Would only work on a softphone
because I have YET to see any VoIP device (phone, ATA, FXO,
FXS) have any parameters to set up a tunnel. So I am unsure
how one would truly call a VoIP Tunnel in a VPN sense, any
kind of true tunneling. (Tunnel in Tunnel maybe, been a
while since I dove into CCIP/IE like material.

J. Oquendo

"Where ignorance is our master, there is no possibility of
real peace" - Dalai Lama

42B0 5A53 6505 6638 44BB  3943 2BF7 D83F 210A 95AF

More information about the VoiceOps mailing list