Remote PC via a NAT/FIREWALL network.

I hv found that i may hv post at wrong place. Sorry..

hihi, I'm very new to the network kind of things. Recently, i'm trying to remote my office pc at home, but i fail to do so. I hv googled for weeks, still cant find the solution. Hopefully some expert over here can help me.

i believe that my office network is behind some kind of firewall or NAT or anything else. (i really not familiar with it). Thus, all the pc in my office is using a same external ip and then the server allocate some internal ip to us.

I hv try using GotoMypc, hamachi, no-ip, hhproxy and many many other software and make HTTP sharing, WAN TO LAN network, create VPN, tunneling ... but nth success ... i cant use the normal remote access software coz i dunno what to type for the ip address since only 1 external ip. i believe the main reason is i not sure how to do it correctly...

i hv try hhproxy which claim that i can map the port of the server to my pc port. but i dunno it works or not.
this is the script
LogLevel 0
TcpMap 6279 120 211.27.164.21 192.168.1.11 6279 0 0

so i really hope somone can help me out. I really appreciate if someone can give me a detail guide or a link to it.

* i dun hv the authority to change firewall setting

this is some website i hv gone through. Just hope it can give more information to u guys...
http://www.remote-desktop-control. [...] ml#1.1.3.6
http://theillustratednetwork.mvps. [...] opSSH.html
http://www.canyouseeme.org/
http://www.pcflank.com/scan.php