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Asked: 2016-05-22 01:39:50 +0800 CST

BTsync Webui unreachable on headless Linux host

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I am trying to install the latest version of btsyc on a CentOS 6.5 headless server. I cannot reach the WebUI.

I configured the webui on port 65000 via a config file and start btsync with the config file as an argument. This is confirmed by the command line reply when I start the service:

Webui is listening on 0.0.0.0:65000

The service itself is configured to run on port 8888. When I run lsof -Pnl +M -i4, I get the following output:

btsync 25687 500 9u IPv4 536416051 0t0 TCP *:8888 (LISTEN)

btsync 25687 500 10u IPv4 536416052 0t0 UDP *:8888

btsync 25687 500 13u IPv4 536416060 0t0 UDP *:3838

Nothing else seems to be listening on 65000. I tried netstat -tulpn as well and the results are the same. I added a rule to iptables and Iptables -L returns (among others):

ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:65000

Here are all the firewall rules. But anyhow, I tried to run btsync after having stopped the iptables service completely, and it was the same result.

The logfile sows the following:

[20160521 17:24:25.687] Configuration from file "/home/includes/btsync/btsync.conf" has been applied
[20160521 17:24:25.690] ZIP: Can't locate [version] in zip, error -100.
[20160521 17:24:25.692] PLC[0x000000000225a8c0] binding on 0.0.0.0:8888
[20160521 17:24:25.692] Socket[0x000000000225a8c0][9] bound listening socket 9 to IP 0.0.0.0:8888
[20160521 17:24:25.692] UDP: bound listening socket 10 to IP 0.0.0.0:8888
[20160521 17:24:25.694] test sha1: ****************
[20160521 17:24:25.694] test sha2: ****************
[20160521 17:24:25.694] test aes: ****************
[20160521 17:24:25.694] Loading config file version 2.3.7, current version 2.3.7
[20160521 17:24:25.694] My PeerID: 107408D3698D9BCA3EF7D****************
[20160521 17:24:25.695] LC: LoadLicenses: there is no pro license
[20160521 17:24:25.695] loaded history: 0 events
[20160521 17:24:25.697] setup socket 13 for local peer discovery for 127.0.0.1: success
[20160521 17:24:25.697] Debug log mask has been set to FFFFFFFF
[20160521 17:24:25.697] Features mask has been set to 0
[20160521 17:24:56.835] OpenSSL: Loaded X509 trusted CA from "/etc/pki/tls/certs/ca-bundle.crt"

I tried to run webui on a different port, the result is the same. I also tried to bind the webui on my server's IP address instead of 0.0.0.0, same result. Any ideas?

[Update] So I started this whole process again with a default config and on port 8888 and now it worked. As a recommendation for people in the future who have such an issue, try to use this command here:

curl -k http://xxx.xxx.x.xxx:8888/gui -v

to see if the server is running from the server's command line. It should show a quite long bunch of HTML if the server is running properly. If that works, try to amend the config file from there on

linux headless

1 Answers

  1. From the official FAQ and the README from the downloaded package:

    IMPORTANT NOTE: To improve security, the LAN listening interface is off unless you configure it. By default the WebUI is only accessible on the computer running Sync (localhost:8888). In order to have the WebUI accessible across the LAN, use a configuration file or start Sync this way:

    $ ./btsync --webui.listen 0.0.0.0:8888

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