question

greg12345678 avatar image
greg12345678 asked ·

SIP Attack

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? 
General Topic
1 |1500 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 1.0 MiB each and 10.0 MiB total.

jessica-community-moderator avatar image
jessica-community-moderator answered ·
Hi Greg, 

Check out this KB article on how to lock down the SIP ports on the router. 
1 comment
1 |1500 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 1.0 MiB each and 10.0 MiB total.

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? 
0 Likes 0 ·
greg12345678 avatar image
greg12345678 answered ·
Thanks Jessica.  I saw that one earlier but my phone is not going through my router. 
1 |1500 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 1.0 MiB each and 10.0 MiB total.

bjsvec avatar image
bjsvec answered ·
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).
1 |1500 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 1.0 MiB each and 10.0 MiB total.

robert-dela-merced9071 avatar image
robert-dela-merced9071 answered ·
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? 
1 |1500 characters needed characters left characters exceeded

Up to 8 attachments (including images) can be used with a maximum of 1.0 MiB each and 10.0 MiB total.

Write an Answer

Hint: Notify or tag a user in this post by typing @username.

Up to 10 attachments (including images) can be used with a maximum of 1.0 MiB each and 10.0 MiB total.

Customer Spaces

Work together.
From anywhere.

Team messaging, video meetings
and phone - all in one app.


Get the new RingCentral app