LilSnoop40, on 30 July 2012 - 12:34, said:
when i ping my home pc's ip via what's my ip it doesn't respond, but if i ping the gateway not the router gateway it reply's
If you're on a router your WAN IP isn't really yours, but that of the router. Chances are your router is just dropping those ICMP packets.. some will ignore them by default unless told otherwise for security reasons, depends on who did the firmware.
If you're trying to connect to your home machine from work then yea, you'll need port forwarding on your router. Also the blatantly obvious besides the firewall permissions, make sure terminal services is running and is also enabled via system properties on the remote tab, you user account is allowed to connect and all that good stuff. If you're just trying to connect to work from home then you won't need the forwarding on your end, just the server side.
Also, if its a corporate setup you're trying to connect to, are you sure it's just a "straight connection" by IP and not some sort of VPN, SSH tunnel or the like? Using the default ports or were they changed? Does your account have permission to connect? Something like RDP often isn't just left hanging out for anyone on the Internet to try and connect to.