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TCP and UDP Ports for WinFax PRO or TalkWorks PRO Fax Sharing August 18th, 2009
WinFax PRO and TalkWorks PRO does not use fixed TCP or UDP ports when using Fax or Message Sharing. Fax Sharing is accomplished using Microsoft DCOM technology. DCOM dynamically assigns one TCP port and one UDP port to each executable process serving DCOM objects on a computer. DCOM initially uses Port 135, once this connection is established, other ports are used. To ensure proper Fax Sharing, you need to ensure port 135 is not blocked and that wfxctl32.exe process is not blocked in your firewall or anti-virus settings.