3CX getting calls from "trunk"

Discussion in '3CX Phone System - General' started by blackpearl, Feb 25, 2017.

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  1. blackpearl

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    Hi all,

    we have a really strange problem.
    Since a couple of days we get every 2-4 minutes calls from "trunk" or 'hi'or'x'='x'. At least this is what we get on the display. So I checked the logs and there is only a entry as follows:

    Call(C:17): ACK is not received from sip:%E2%80%98hi%27or%E2%80%98x%E2%80%99=%27x%27@"our wan ip"

    Any clues?

    thx
    dan
     
  2. mahe23

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    We had exactly same Problem. My solution was to enter CallerID ="trunk" to the blacklist.
     
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  3. mahe23

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    Now I get calls from "hi'or‘x’='x'" and i put it to the Blacklist.

    Is there a danger? How can we pretend us?
    Matthias
     
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  4. blackpearl

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    Thanks Matthias,

    I actually found out that some attacks got through my firewall. Even when "SNORT" was active. I just blocked them.
    I'll try to find out why they got through snort.
     
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