![]() ![]() Wait 1-30 minutes and the VMWare NAT service will start properly forwarding traffic from host to guests. Cannot do this without Local Admin privileges.Ģ. This issue does not affect VMWare’s bridge interface or any VirtualBox interfaces.ĭon’t set source port to well-known port while on NAT.ġ. ![]() This was confirmed on VMWare Player (7.1.0) and Workstation (v11.1.3) on Windows 7 machines. The nmap command that originally caused this issue was using SYN scanning for host discovery as well as port scanning which compounded the problem to the point network access would drop for 20-30 minutes on all VMs using VMWare’s NAT interface. This magnifies as more closed/filtered ports are queried from a well-known source port. The network adapter stops all traffic when a SYN/ACK response is not received. I’ve narrowed the cause of the interface going down to the g flag (which sets the source port) setting a well-known source port (1-1024) and SYN/ACK discovery scanning being used on closed ports. A coworker discovered a bug where network connectivity would stop working when a particular nmap command was run on a VM using NAT. ![]()
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