Security for my SIP service on the router?

[dastrix80]

Hi All,

I have 1 mobile device that calls into the Router via SIP, the IP address is however dynamic and changes between ranges frequently.

Ive got Toll Fraud prevention off, but Id like some more security on the router for voice calls coming in as I can see theres some unusual requests going on.

How can I secure my SIP calls other than what ive got now with the username/password?

Thanks

Kris

[Mohammed al Baqari]

One way is to use SIP authentication to makesure that calling party
authenticates successfully. However, I strongly recommend to go for
expressway deployment as its intended for these scenarios.

[dastrix80]

Thanks, ive used the username/password and the ipv4 trusted list to secure it. I have no ability to setup a VM for expressway