I have set up an Elastix install running as a VM on a server at home as a home system with 5 extensions. Intermittently incoming calls are rejected with the message
Sending fake auth rejection for device… in the Asterisk logs. I know these are valid attempts as I can see my mobile number and they are coming from the IP of our SIP provider.
I have my Firewall set to block all SIP connections except from my SIP providers range. If I call back in a few minutes, the call may connect. It appears random. I am sure our SIP provider uses several SIP gateways and was wondering if this could be related. I know it is not a firewall issue as I see it in the Asterisk log.
My googling has only returned results for people who are being hacked, which is not the case in this instance.
Any suggestions would be much appreciated.
PS I am new to Asterisk and linux, but not to computers/networking/firewalls etc, so be kind.