Installing on a Linode (or other remote Linux)?

Support
1

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 0.0.0.0:48683: i/o timeout)    
beacon.go:94: write udp4: network is unreachable

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

2

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.

3

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 0.0.0.0:44121: i/o timeout)”

Syncthing made keys, created a node ID, and says it’s “ready to sync default”. However, the WebGUI at xxx.xxx.xxx:8080 will not open remotely. I tried both http:// and https:// but neither worked. What am I missing?

4

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">
        <address>127.0.0.1:8080</address>
...

to

<gui enabled="true" tls="false">
        <address>0.0.0.0:8080</address>
...

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 8085:127.0.0.1:8080 and then you can reach syncthing on http://localhost:8085/ on your own computer.

5

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.

1 Like
6

Thanks calmh. The config.xml edit to 0.0.0.0:8080 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!

7

I add this to https://forum.syncthing.net/t/frequently-asked-questions-faq/405 :wink:

8

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 https://example.com/syncthing 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)

9

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.

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