Who is this dude on 113.105.152.32 and why hasn’t he/she been shut down ?
A customer of mine has just had the thing happen to him.
Quite simply, 113.105.152.32 is a Red Hat Linux host with Asterisk running on it which is actively exploiting VoIP PBX servers that have hairpin call routing inadvertently enabled.
I’m actually surprised that this has been going on for so long.