
The most common cause of a port being blocked is due to a piece of network hardware – either a router or a firewall. If port 5003 is blocked it can effect the network sharing functionality of FileMaker Pro. The primary port used for FileMaker network sharing is 5003. The network file sharing in FileMaker Pro and FileMaker Server also uses ports to communicate with other FileMaker Pro and web clients. When an application is using a port to send or receive data, that port is commonly referred to as being “blocked.” This is why you might sometimes get a port conflict error when using your computer for some network operations – like file sharing with FileMaker Pro. It is important to note that a port can only be used by one application at a time. For example, web browser traffic commonly uses Port 80. An IP address is made up of multiple ports and different types of data are assigned to and travel along different ports. PORT / PORT NUMBER: A port is a unique pathway for data. Typically an IP address is represented by a set of four three-digit numbers ranging from 0-255 and divided by periods - for example, 192.168.1.150 IP ADDRESS: A unique identification number for a computer on the Internet. A brief description of IP addresses and ports are:
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This is done, primarily, by telling your network firewall or router how to direct specific network data to the right IP Address and to the right port on that IP address. The term “Port Forwarding”, also referred to as “Port Mapping” and “Punching A Hole Through Your Firewall” among others, allows for you to specify how network traffic is directed to your computer and eventually ends up in the right place.


Solution home Crate Pro 5 Information & Lessons Networking Understanding Port Forwarding (CP5)
