[Freeswitch-users] (no subject)

Kamil Nigmatullin kamil.nigmatullin at gmail.com
Mon Oct 20 14:46:49 MSD 2014

Dear all,

Today we had an attack. One of our clients lost password to his SIP
account. So with this password attackers made calls on our client's behalf
to very expensive destinations.

We have Opensips as a border controller and Freeswitch as a Softswitch.
This phone was confugured for 1 concurrent line using module limit of FS.
Howerver they somehow managed to make several concurrent calls per one
account. On CDR's we found that there was Attended transfer. Does anybody
knows what kind of attack was that and how I can protect us against this?

When I check if limit works whith a sipphone, I see that it workd 100%.

Thanks in advance
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