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I have two Ubuntu 12.04 computers on a wireless home network, kept in sync using Dropbox. I use Dropbox rather than Ubuntu One because of its LAN sync feature - preferable to doing everything via the internet.

Will using GUFW (firewall) disable this LAN sync function? If so, how do I get round it?

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Yes, a firewall will disable LAN sync. You must configure it to allow connections to port 17500 to make it work.

More info about LAN sync here.

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