I have BtSync set up on a handful of machines and it's working great: Debian 7 (x86) - 192.168.10.102 Debian 7+ (Testing) (x86) - office computer Android 4.2 - 192.168.10.105 Android 4.1 - 192.168.10.106 This machine doesn't work: Debian 7+ (Testing) (x64) - 192.168.1.100 Network setup: Internet > 192.168.1.0/24 Router, anything on this network BtSync won't work > 192.168.10.0/24 Router, anything on this network BtSync works fine On the problem machine (192.168.1.100), I cannot get anything to connect outside of that subnet. The router has UPnP enabled and netstat shows the btsync is listening, but nothing connects. I can connect/sync if I have both devices on the same network subnet (192.168.1.0/24) but nothing outside of that will connect; I have another router and devices on the 192.168.10.0/24 range (router IP 192.168.1.111) and they work fine (and the 192.168.10.0 network uses the 192.168.1.0 network as the default gateway). So I have to think the network is allowing traffic through, if the 192.168.10.0 network functions. I've tried using a custom config for btsync, no change;I've ensured UPnP was enabled in my routers (error before this was "Could not map UPnP Port ___ retrying.");I've found the .sync/ folder and tried to create ~/.sync/debug.txt with FFFF inside it, but nothing shows in the logs;I've tried running with --nodaemon but there are no messages being printed to stdout or stderr that I can see (now that "Could not map UPnP..." is resolved)netstat shows the ports listening;there is no local firewall running on this machine at this timeconnections don't work to the next router (downstream) nor over the Internet (upstream) I am out of ideas, can anyone help me?