3CX Windows SBC error

[numerii]

I'm getting connection issues with the 3CX Windows SBC not connecting - the newer version on some of my extensions won't connect using the latest version (16.1152) but when I revert to the older (16.0.390) they connect fine. I'm now having to run the older version on some of my remote extensions?

The log show some kind of DNS issue but this only happens on the latest version. (I have removed my DNS name)

ERR | 20200615-092423.020 | 3CX | SBC | 8640 | TunnelTcp.cpp:183 | Failed to resolve DNS SRV record for tunnel connection to XXXXXXX.3cx.co.uk
ERR | 20200615-092433.051 | 3CX | SBC | 8640 | Dns.cpp:100 | [DNS] Got no answer during 10 sec., host resolution failed
ERR | 20200615-092433.051 | 3CX | SBC | 8640 | TunnelTcp.cpp:200 | Failed to resolve host name XXXXXXX.3cx.co.uk
ERR | 20200615-092433.051 | 3CX | SBC | 8640 | TunnelTcp.cpp:255 | Failed to resolve connection FQDN XXXXXX.3cx.co.uk
ERR | 20200615-092433.156 | 3CX | RESIPNS | 8640 | DnsStub.cxx:594 | Connection error Timeout while contacting DNS servers for XXXXX.3cx.co.uk

 

[Alphabetic]

Have you tried changing the DNS on the SBC to Google? 8.8.8.8

 

[JohnS_3CX]

I would suggest to install the Stable version 16.0.390 rather than the beta you have installed now.

 

[numerii]

Oh Beta version?? - didn't realise this was beta as it just came up as Update on the system. If that's the case I will revert.