VCS toll-free fraud

I read the previous discussions on fight against fraud without charge and I just wanted to clarify if my script is correct.

We use the VCS - C and E for video endpoint registrations and also helped MRA for Jabber client to connect to the outside.

There is also a trunk of CUCM to allow internal connections between the devices registered CUCM and endpoints of VCS.

Video recorded at VCS, endpoints are allowed to make outgoing calls through the trunk, which will then forward to the PSTN gateway.

I have install the VCS - C to accept only the green list records.  Do I need to do anything on the VCS - C or E to fight fraud toll-free?

Fraud free of charge has nothing to do with the inscriptions on the VCS, it's just the fact that your VCS-E can accept incoming calls from the public internet. You must disable the UDP in the SIP settings on the VCS-E, it should be disabled by default, but in some cases it could be always activated if your VCS has been installed before the setting being disabled by default for new installations.

There are other methods these days where people are trying to use H323 for attempted fraud free of charge, but it is difficult to prevent that you can not just disable H323, you should just keep an eye on the search of VCS - E for all incoming calls strange history you don't regcognize, then create a CLP script that can block these calls. There are many discussions in the forums, which are a good resource to understand and at least limit fraud toll-free.

Tags: Cisco Support

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