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...nd of dictionary, and try to guess valid peer names to use one by one. Apparently after quarter million tries, they do find a legitim sip peer name and from that point they stick to that peer name and the attack continues to guess only passwords. Of course, they can not guess passwords like p(F9j43/Qgrhjv*&^3 so i'm still not worried, but this made me believe that asterisk responds differently when probing a valid sip peer name. So i was wondering through the sip.conf and found 'alwaysauthreject' which was set to default (commented out). I now set its value to yes (which...