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2011 Jan 19
1
sip dos question
...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 i thou...