attack

  1. chrisbeam

    simultanious call feature leads to 780 call attempts (in 120 sec) to users cell phone.

    Today i noticed that one of our users had made a call to their own cell phone like 50x within 2 minutes. as i investigated the situation i found this kind of system records about 50x: 15/11/2022 10:58:48 - [CM503003]: Call(C:69): Call to <sip:[email protected]:0> has failed; Cause: 486 Busy...

  2. Solved Lots of IPs getting blacklisted > how to respond to the threat?

    We've started using 3CX in May 2020 and in July we started getting IP blacklisting notification mails. The amount of IPs being blacklisted has increased since then and over 200 IPs were blacklisted during the last three weeks. I already increased the blacklisting time from the inital 1 day to...

  3. 100s of Robo-Calls - how can i stop this?

    I get calls almost every minute all day long. These calls are not coming from the trunk, but they are direct sip calls with fake caller id's like "test" or "1234567899". The robot call is no message on my mailbox, just 14 seconds of silence. What can i do to stop those calls? How can i...
  4. Sergio Lourenco

    Solved The IP has been blacklisted

    Hi guys, Do you know what to do here? There is something happening what I believe to be someone trying to break into my system. What can I do to block it and guarantee security in my network?
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