CLI port shutdown command?

[GixJim]

is there a CLI command for shutting down or opening up a port?

if so what is it?


Thanks in advance
Jim

 

[Nybbles]

shutdown and no shutdown, maybe?

perhaps we could answer the question if you told us what vendor, model, and versions.

 

[GixJim]

Sorry, I guess that would help.

In either XP or 2k Pro I want to be able to open the command prompt , list active/open ports and shutdown ports at my choosing. I use netstat -ao to list ports and PID's currently and I can stop the services but I want to be able to close ports at the command prompt.

Thanks
Jim

 

[BobSutan]

Ugh. I don't know about the command prompt, but you can do it in Network Properties in Advanced options. I'll make a more formal walk-through when I get home. I'm on Win2K here at work.

 

[BollWeevil]

GixJim,

Generally ports can't be opened and closed in user mode. Applications use operating system calls which bind the application to a specific socket in the TCP/IP stack, which remains bound until either the application closes the port or the application is terminated.

If you are concerned about security issues of having open ports, there are two solutions:

1. Terminate the application using the port/disable the service
2. Use a firewall to block external access to these ports. They will still show as open in netstat, but inaccessible to the outside world.

There's a free utility called Fport by Foundstone Labs which functions like netstat but will map ports to running processes and tell you which applications are bound to open ports.

 

[GixJim]

Bob no need for the write up, I know how it is done in GUI, but thanks anyways.

Boll thanks for the additional info, I will check out the Fport tool.

Thanks
Jim