I need to encrypt calls going through a SIP Trunk (CUCM 7.1(5)) to a Cisco 2800 Gateway.
At first I was planning to use TLS encryption, but a coworker of mine suggested me to use IPSec to encrypt the communication, instead of TLS.
He tells me that it will be much simpler to deploy (we already have the same setup with IPSec on some VG224 gateways), and it wont´require dealing with a CA infraestructure, offereing the same level of cypher.
Is there any diasvantage to using IPSec over TLS?
The CUCM and Gateway are all inside my customer´s network. No public access and no external provider in between
That is not true! You CAN do IPSec directly from CM. Its possible from CUCM 6.x and later if I am not mistaken (I am using 7.x) In OS Administrations -> Security -> IPSec you can configure the profiles.
I am certain of this, because we already have several VG224 configured using it
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