I have a question about some voip/vpn configuration. I've got two sites that have 1760 routers with fxo/fxs cards that are going to be tieing the two phone systems together with a couple of voip trunks. These are secondary devices on the network, but addressed with a 2nd wan ip. The only traffic going through these routers is voice/voip.
My question is about this voip setup with vpn. If I configure an easy vpn server on the router at site 1 and easy vpn client on the router at site 2, and have a site-to-site vpn connection, will the voip traffic pass over that? Is there a need to have a vpn? Any benefits to sending the voip data across vpn, other than the obvious encryption of the "call"?
Here's my voip configuration as it sits on the bench in testing:
Hi, not sure why you posted in video since it is a voip question, anyway to answer your question, is not that you have to use vpn all the time just because is crypted, if the routers are facing the internet they can do perfectly do without. That is the simplest and easier to diagnose configuration, with also the less overhead.
Eventually, again if yo don't care about encryption, you can setup a GRE tunnel to connect any subnet behing the routers. Again voip can normally work outside the tunnel as it is router-to-router communication after all.
In any case make sure you configure an ACL blocking H.323 and SIP coming from unknown addresses, because if you have a PSTN connection, it has become a common fraud with people making expensive calls.
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...