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iphonenetwork-programmingwifiportblock

How to pick a port number?

I am trying to develop an iPhone p2p application.

I am going to use a centralized server and users will update their IP addresses to the server. I want to set up a connection between users, regardless of what network users belong to.

I was going to use a fixed port number and someone pointed out that a router, if the user connected via Wi-Fi, might block the port number I manually set up.

How do I fix this problem?

Solution

  • You can't fix this problem. The administrator of a "router" is free to block arbitrary port numbers.