[asterisk-users] Failed to authenticate user 1000<sip:1000 at MY_OWN_IP_ADDRESS>; tag=03f82bb9

[gincantalupo]

Hi,

I get a lot of these messages on my Asterisk CLI:

"Failed to authenticate user 1000<sip:1000 at MY_OWN_IP_ADDRESS>;tag=03f82bb9"

as if my PBX machine is trying to authenticate to itself. It seems 
someone is attacking my asterisk PBX.

Is there a way to fix this problem?

Thank you.

Giorgio Incantalupo