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I'm trying (for the first time so it could be something obvious) to connect to a remote ubuntu desktop that I have just purchased on a dedicated server. I'm trying to connect to it from an ubuntu OS on my laptop.

I can connect using SSH via secure shell programme no problem and can move around the OS at a command-line level. I can also ping the server IP without any packetloss and low latency.

When trying to connect with a GUI tool such as TeamViewer and I've also tried Remmina it simply won't connect.

TeamViewer gives me the following error: "A connection could not be established. Reason Unknown."

So as you can see this really doesn't help me in anyway to why it can't connect.

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Is teamviewer also on the machine you are trying to connect to? –  Kevdog777 May 17 '13 at 8:03

2 Answers 2

TeamViewer? Open 80, 443 and 5938-5939 port.

Which ports are used by TeamViewer?

In general, TeamViewer will always work if surfing on the Internet is possible. Hence, no firewall configuration is required. As an alternative to port 80 HTTP, port 443 HTTPs is also being checked. In addition, it is also possible to open only port 5938 TCP on the outgoing side. Data traffic should then be able to pass through on this port without any problems.

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I believe under advanced options, "deny local connections" is checked by default. If you are ssh'ing in, that would stop you.

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