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I am using Ubuntu 14.04LTS. Recently, I needed to use remote control of my computer in my office. So I set up desktop sharing. I can use my own laptop to control my desktop when I am in the office, however, when I go back home, it doesn't work. I tried to turn off firewall, but it didn't work either.

Does anyone have any idea what's going on here?

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  • Please edit your question and explain how you set up desktop sharing. Are you using an IP or a server name? Are your laptop and desktop connected to the same network?
    – terdon
    Mar 27, 2015 at 13:02

1 Answer 1

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I will be answering your question as I understand it (not that well):

  • you have a PC (PC-1) at work that you enabled desktop sharing
  • you used another PC (PC-2) at work (on the same network) to successfully remote into PC-1
  • you went went on a home PC (PC-3; different network) & couldn't successfully connect to PC-1 in office

Its because of your router/firewall configuration on your work network-ie SECURITY. Someone will need to port-forward/allow port 5900 (assuming its VNC) on that work router/firewall

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  • Hey, thanks for your help! I'v talked to my network security and they help me solve the problem. It's because port 5900 has already been used. But I can use realVNC to connect with my PC in office.
    – Wang-Wei Lan
    Apr 5, 2015 at 19:46
  • No problem. Would you mind marking it as the answer?
    – gregg
    Apr 6, 2015 at 13:57

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