Question

SIP Attack

Forum|Forum|6 years ago
September 16, 2019
5 replies
780 views

greg12345678
New Participant

Every 3 to 5 minutes I am receiving a call that is not being recorded on the ring central server. It is even a blocked number. It usually comes in as 8889207896. Earlier in the day I think it cam in as SIP vicious 101

I believe this may be what is called a SIP attach directly to my Polycom vvx 201.

Does anyone have a resolution for this type of problem. Ringcentral support had no solution and my ISP had no solution. Is there a way to block this fake call inside the polycom phone?

J

+1

Jessica H.
Community Manager
Forum|Forum|6 years ago
September 16, 2019

Hi Greg,

Check out this KB article on how to lock down the SIP ports on the router.

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G

greg12345678
Author
New Participant
Forum|Forum|6 years ago
September 16, 2019

Thanks Jessica. I saw that one earlier but my phone is not going through my router.

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B

bjsvec
Known Participant
Forum|Forum|6 years ago
September 16, 2019

Its sounds like your phone is exposed to direct inbound internet connections. That is dangerous and you need to get the phone behind a firewall or at the very least behind your providers router/modem without any inbound ports open to the phone(s).

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R

robert-dela-merced
New Participant
Forum|Forum|5 years ago
April 10, 2020

In our situation, it is the opposite: our RingCentral phones will make outbound calls every few minutes to a recently dialed number. It will go on for hours until you yank the power off the phone. Has anyone experienced this before?

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D

david-16
New Participant
Forum|Forum|3 years ago
July 27, 2022

I've read the KB Article and we all work from home. Where do I enter these ip addresses? Our phones are set up through Ringcentral's website, we don't use RIngCentral cloud. Help?

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