Suppose I have a setup as:
host_1 --- Firewall_1 --- Internet --- Firewall_2 --- host_2
I need to check which ports are open on host_2 from host_1 (which may be blocked by either firewalls)
Is there a tool that comes in two parts (one running on host_1 and other on host_2) that does this for me? It should be something like:
1 Listen to all ports on host_2 2 Try to connect to every port on host_2 from host_1 3 Give a report what ports are allowed.