hi, this is my configuration: pc1 with fedora 19 (linux) und btsync 1.1.70 pc2 with linuxmint lmde 2013 and btsync 1.1.70 virtualmachine (virtualbox) on pc2 , win7 and btsync 1.2.82 pc1 and pc2 syncs to the virtual machine und reverse but pc1 is not syning to pc2 , pc2 is not syncing to pc1 . they don´t find each other. i tried it by stopping all runnig firewalls (pc and router), i tried by making a portforwarding at the router. i tried to predefine the host with port. nothing works. is there anybody who can help ? thank you.