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Joined: Aug 2012
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That is very similar to the firewall ports we have open, though on the image I sent yesterday, they were hammering 5566 with a syn flood. Will wait to see if it happens again, and try to confirm that this is indeed the issue. May need to look into IDP devices to put in front of that router.

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Try disabling the SIP UDP Listening Port as well. You will also want to change the port to something other than the default of 5060.

Here is a link to a post that discusses it a little more

https://sundance-communications.com...Re_Inter_Tel_system_shutsdown_#Post65299

Joined: Aug 2012
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I second that; my Mitel BOD was very specific about 5060 - he said never open that on our system!!! Because we do not need it and it is a target for attack by 'free calls on SIP' scroungers.

- Simon


If a job is worth doing, it is worth doing well.
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