How to secure access to PSTN line through Linksys gateway?

Question

Hello

I successfully hooked up a Linksys 3102 SIP gateway

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an Asterisk server, but since it's connected to a PSTN line, I must make sure it cannot be used by unauthorized users from the Net. Actually, even legit users with an account on the Asterisk server shouldn't be able to use it (outgoing calls should go through a VoIP provider instead).

Does someone know what steps must be taken in Asterisk and on the Linksys to secure access to the Linksys box?

Thank you.

Jonathan Roberts · Accepted Answer

Have you set it up as its own trunk in Asterisk?JonathanPS-- is this 'plain vanilla' Asterisk or TrixBox/freepbx?

Enzo Michelangeli · Answer

It's very easy to prevent outgoing calls initiated by Asterisk: just don't put anywhere in the dialplan a "Dial()" statement referencing the 3102 (or if you do, don't make the context where it occurs accessible by regular users).

If you worry about direct SIP sessions from SIP clients to the 3101, you might register the 3102 to an Asterisk account and set "Make Call Without Reg:" to "No" in the "PSTN Line" screen.

Or, if nobody should be authorized to dial out, just disable the "VoIP-to-PSTN" function. In the SPA-3100 you can set the "VoIP-To-PSTN Gateway Enable:" to "No" in the same "PSTN Line" screen: the 3102 should be similar.

Enzo

Vincent Delporte · Answer

No idea :-) I just added an account for this device in plain vanilla (with hot fudge on top, I confess).

Jonathan Roberts · Answer

Looks like Enzo got to you first :)  Good luck!Jonathan

Vincent Delporte · Answer

(snip)Thanks a lot :-) I'll check those three points.

How to secure access to PSTN line through Linksys gateway?

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