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How to block ghost calls
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How to block ghost calls
The VoIP device has been receiving ghost calls from a fixed IP (seems to be self-generated from the router).
There is a suggestion to forward the Port 5060 to an internal IP address outside the DHCP range and then set WAN Security to Open and Disable SIP ALG.
Please advise if the above solution works.
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Re: How to block ghost calls
Perhaps you could provide a more detailed description of the problem?
There are dozens of VoIP systems. Which is this one?
Can you clarify "from a fixed IP"? Does this mean "from the same IP every time"?
I am not clear on the meaning of "seems to be self-generated from the router".
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Re: How to block ghost calls
The VoIP device is Polycom RealPresence Group 500.
The ghost calls (only receiving ringing tones but no callers at the other end) have been generated from a fixed IP address with the following displays, like :
2850@192.168.1.39;
2851@192.168.1.39;
641@192.168.1.39;
1781@192.168.1.39;
1001@192.168.1.39;
1000@192.168.1.39;
100@192.168.1.39;
ml@192.168.1.39;
suk@192.168.1.39; etc.
The IP address is the Polycom device internal IP.
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Re: How to block ghost calls
I would contact the phone Mfr to see if they have any information on this. They may have features to help on this.
@DL19545698 wrote:The VoIP device is Polycom RealPresence Group 500.
The ghost calls (only receiving ringing tones but no callers at the other end) have been generated from a fixed IP address with the following displays, like :
2850@192.168.1.39;
2851@192.168.1.39;
641@192.168.1.39;
1781@192.168.1.39;
1001@192.168.1.39;
1000@192.168.1.39;
100@192.168.1.39;
ml@192.168.1.39;
suk@192.168.1.39; etc.
The IP address is the Polycom device internal IP.
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Re: How to block ghost calls
Polycom support said the H.323 protocol has no function in stopping ghost calls. They recommend a blocking at the router end. That's a suggestion of forwarding the port and open the WAN and I just wonder would such suggestion would work and would like to know if anyone has tried this before.
@FURRYe38 wrote:I would contact the phone Mfr to see if they have any information on this. They may have features to help on this.
@DL19545698 wrote:The VoIP device is Polycom RealPresence Group 500.
The ghost calls (only receiving ringing tones but no callers at the other end) have been generated from a fixed IP address with the following displays, like :
2850@192.168.1.39;
2851@192.168.1.39;
641@192.168.1.39;
1781@192.168.1.39;
1001@192.168.1.39;
1000@192.168.1.39;
100@192.168.1.39;
ml@192.168.1.39;
suk@192.168.1.39; etc.
The IP address is the Polycom device internal IP.
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Re: How to block ghost calls
You could try using PF and input in a IP address that is not used by the RBR or a device and see if this would help though not sure if the call would still be fully blocked or not. Try using 192.168.1.253 as a PF address to use. Make sure your devices are not assigned to this address.
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