id summary reporter owner description type status component version resolution keywords cc guest host 13987 VBox 4.3.26 NAT Network unstable tkvb "VBox 4.3.26 running on Windows 8.1 x64 host 2 Ubuntu 14.04.2 VMs configured to use a NAT network After a while (maybe under heavy network load between the 2 VMs?) the NAT network stops passing traffic to the outside world. The 2 VMs can still talk to each other but not with the outside world until they are both rebooted. This started with the upgrade to 4.3.26, the same setup worked OK before." defect closed network/NAT VirtualBox 4.3.26 fixed NAT Network Linux Windows