Is my ISP blocking gaming ports

January 24, 2011 at 22:47:15
Specs: Windows 7, 2GB
Hi, is there something like that can tell me if my ISP is blocking access to CoD 4 servers?

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January 25, 2011 at 01:14:46
Highly unlikely your ISP would be blocking gaming ports.

According to that site, you can check any port by just putting it into the URL: , for example, will externally check port 3992 on your machine/router ...but you need to check the CoD ports.

Also, that only checks TCP whereas most game data is transmitted w/ UDP (Although, it may still need a TCP socket for control)

so the short answer is ... uh, what?

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January 26, 2011 at 08:08:06

Firebind is the only tool on the Internet that can test any of the 65535 TCP or UDP ports in the outbound direction (pc to Internet.) If you want, you can test the entire TCP and UDP range.

Firebind is sometimes confused with tools like,, and which are meant to test inbound connections (from Internet to client machine), usually to validate whether a user has set up their port forwarding rules in their firewall correctly. Other tools like NMAP are port scanners which are designed to probe for open ports on a target machine using a specific IP address. A port scanner is only useful to test a single IP address for vulnerabilities and doesn't help a user determine whether their path to the Internet is being blocked.


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