[asterisk-users] Failed to authenticate

[Julian Beach]

Hello Antony,

Monday, August 9, 2021, 4:14:11 PM, you wrote:

> You want to look for firewall rules which will allow UDP in both directions on 
> ports 10000 - 30000 (typically, may vary a bit, but something like that), or 
> alternatively, look for any rules which would block this, and remove them.

This. Check that the port range in rdp.conf matches that in your firewall UDP settings. Even a slight mismatch in the ranges can result in a surprising number of calls with one-way audio which seem to happen in clusters.  

-- 
Best regards,
 Julian                            mailto:jb_soft at trink.co.uk