How to enable blocked SIP Providers
The Wiki of Unify contains information on clients and devices, communications systems and unified communications. - Unify GmbH & Co. KG is a Trademark Licensee of Siemens AG.
The SIP protocol is used heavily for attacks from the Internet. As counter measure, OpenScape Office V3.2 and OpenScape Business have implemented a number of security mechanisms including the blocking of unknown peers.
External SIP communication is only possible via IP addresses and ports known to the system.
The document gives a description of all protection mechanisms, diagnostic data and recommended measures as well.
