Installing on a Linode (or other remote Linux)?

Anyone tried installing it on the various Linux boxes out there? Seems to start up with a local server on 8080, but I’m getting a few of errors:

No UPnP IGD device found, no port mapping created (read udp4 i/o timeout)    
beacon.go:94: write udp4: network is unreachable

are there some config changes needed to get it working? thank.

This just means that there is no UPnP router (expected) and that one of the interfaces syncthing tried to announce itself on doesn’t support multicast / doesn’t have a multicast route.

This is nothing to worry about. If something doesn’t work, there is another cause for it though.

I installed 0.8.15 (32) over SSH on a remote linux VPS (digitalocean). I received a similar error message as the OP:

“No UPnP IGD device found, no port mapping created (read udp4 i/o timeout)”

Syncthing made keys, created a node ID, and says it’s “ready to sync default”. However, the WebGUI at will not open remotely. I tried both http:// and https:// but neither worked. What am I missing?

That there is no UPnP device in a shared hosting environment is expected; ignore the error, or disable UPnP in the config.

The GUI is not remotely accessible by default. You will need to edit the config.xml and change

<gui enabled="true" tls="false">


<gui enabled="true" tls="false">

and then you’ll be able to access the GUI.

Edit: You can also use an ssh port forward. The easiest way to do this (at least with a Unix ssh client) is when you are already ssh:d to the box. In the ssh connection, hit <enter>~C (yes a tilde then C) and you’ll get a special ssh> prompt. Enter the command -L 8085: and then you can reach syncthing on http://localhost:8085/ on your own computer.

If you’re going to make it remotely accessible you should probably set a username and password though… you can do that in the web interface immediately after making it world accessible.

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Thanks calmh. The config.xml edit to did the trick for me, and I can now access the WebGUI remotely.

And jpjp, your advice to password protect access makes perfect sense to me.

Thank you both for your assistance!

I add this to :wink:

I use a .htaccess file for accessing the GUI over the apache webserver

(also rewriting from http to https)

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteCond %{ENV:HTTPS} !=on
RewriteRule .* https://%{SERVER_NAME}%{REQUEST_URI} [R=301,L]
RewriteRule ^(.*) http://localhost:8080/$1 [P] #replace 8080 if you have another port

if you place this in www-root/syncthing you can just use to get the webinterface and it also uses the certificate of the webserver and no additional port needs to be opened if you have a firewall (for GUI, sync port has nothing to do with this)

I just stumbled across an excellent Syncthing / VPS tutorial that digitalocean published earlier this week. Their technical writers talk in plain English to a largely linuxphobic audience, and they use lots of cut n’ paste terminal commands and graphics to make it all easy.