Windows – Multiple Vlans per NIC on Windows 2008

I've had success with Sysinternals Process Explorer. With this, you can search to find what process(es) have a file open, and you can use it to close the handle(s) if you want. Of course, it is safer to close the whole process. Exercise caution and judgement.

To find a specific file, use the menu option Find->Find Handle or DLL... Type in part of the path to the file. The list of processes will appear below.

If you prefer command line, Sysinternals suite includes command line tool Handle, that lists open handles.

Examples

• c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "e:\" (finds all files opened from drive e:\"
• c:\Program Files\SysinternalsSuite>handle.exe |findstr /i "file-or-path-in-question"

Sure, you simply have to enable vlan tagging on the switch and the network adapter and setup both sides with all the vlans you want the computer to see.

The details about how to configure vlan trunking vary depending on what OS, and what you have to do for a specific nic or switch.

Keep in mind that this may be a bit of a security issue. Suppose this is connected to two networks which have some firewalling between them. The computer that spans these two networks becomes an alternate pathway. If an attacker can compromise the system, then they can use the system jumping point to get to the inside hosts.