windows 2003 - why can't serial port be accessed remotely?
- by Danny Staple
we have recently installed the updates on some of our servers, which have a bit of hardware attached via USB that presents itself as a serial (COM) port.
The strange behaviour is that if I start a cmd shell on the server via VNC, I can open the serial port. If I run a service and start it from there (telnet, jenkins) then I receive a "not found" error for it.
IE:
C:\Documents and Settings\some_user>echo 1 >COM4:
C:\Documents and Settings\some_user>
on the local cmd will work, and on the remote telnet will give:
C:\Documents and Settings\some_user>echo 1 >COM4:
The system cannot find the file specified.
C:\Documents and Settings\some_user>
I cannot see any security settings on the Device manager settings panel for this device.
