id summary reporter owner description type status component version resolution keywords cc guest host 13189 Network does not work when host is under NTLM proxy ehasis With VirtualBox 4.3.14 the network does not work when the host is installed in Windows 8.1 x64 with NTLM proxy (Forefront TMG) and any kind of guest (I tried with Linux and Windows guests). I rolledback the version 4.3.12 and does work properly. defect closed network VirtualBox 4.3.14 duplicate proxy ntlm all Windows