chan_sip.c: Failed to authenticate error

Hello, I get quite a lot of these types of notices in the ‘full’ log:

Are these hack attempts?


Any system open to the internet will receive hack attempts, but it is not possible to tell from your report whether this is hostile or even remote. It could be a misconfigured system, either locally or remotely.

If the IP address is remote, you will certainly be getting some hack attempts reported like this, but this might be an innocent mistake, or even one of your remote users who is misconfigured.