TCP Checker is a simple tool to allow you test whether a TCP connection can be made between the system it is running on and a host somewhere else on a network. It can be used to troubleshoot whether a port may be blocked by a firewall or routing rule.
Screenshots
Prerequisites
The following items are required for TCP Checker to run properly.
The following operating systems are supported for running TCP Checker. It may run on other operating systems, but I have not tested any except the ones listed.