OPNsense Forum
English Forums => General Discussion => Topic started by: jaimito on May 29, 2019, 06:54:47 pm
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Hi
we have commercial support for our move to OPNSense but this concerns my own setup.
When in rural Spain I no longer have access to WiMAX which although slow gave a fixed IP and decent IPSec to London (as Telefonica have dumped WiMAX altogether).
I now only get connection via 4G with dynamic IP changing somewhat frequently, so IPSec not feasible.
What I hope to do is to use ZeroTier to establish a VPN connection to London so that I can run VoIP over it to my office Asterisk exchange.
I will be using the provider-supplied 4G modem/router which has an ethernet port.
So a schematic would be:
^
|
--[4G modem]--ethernet--[OPNSense running ZeroTier routing VoIP]--switch--clients including VoIP phone (Siemens)
My questions are concerning how best to get this to work. I assume double-NAT would be a bad idea both for VoIP and ZeroTier -- the 4G modem/router by default does NAT, and I have not had much success in setting it to pass all traffic to a designated DMZ, port opening may work though.
-- will this idea work at all?
-- should I set the OPNSense to no-NAT?
-- or forward ports to it?
-- has anyone done anything similar and got it to work?
Any clues or suggestions welcome -- I am in the UK at present but will be on-site there later in the year.
Thanks in anticipation...
MeJ