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3CX getting calls from "trunk"

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blackpearl

Bronze Partner
Basic Certified
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Apr 8, 2016
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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
 
We had exactly same Problem. My solution was to enter CallerID ="trunk" to the blacklist.
 
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
 
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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