How to shutdown open network ports?

[ESmith]

My application when run, needs to close all outgoing ports (excluding
80,443,25). With packet filtering I've figured out how to block "new"
traffic, but how do close an existing, established connection - that is,
some server program that is waiting on connections at a certain port?

TIA

 

[Lenny Lennoson -- *Shark tale*]

ESmith ã®ãƒ¡ãƒƒã‚»ãƒ¼ã‚¸:

My application when run, needs to close all outgoing ports (excluding
80,443,25). With packet filtering I've figured out how to block "new"
traffic, but how do close an existing, established connection - that is,
some server program that is waiting on connections at a certain port?

TIA

Can C# alone accomplish these enable-disable functionalities ? I guess
some kind of dll import might be in need, I used to use network
interface provided in my C# Exp but failed to static cast the enum type
into the provided interface type.

 

[chanmm]

Look for Win32 map to WMI (System.Management) then you might get what you
want.

chanmm

message
ESmith ??????:

My application when run, needs to close all outgoing ports (excluding
80,443,25). With packet filtering I've figured out how to block "new"
traffic, but how do close an existing, established connection - that is,
some server program that is waiting on connections at a certain port?

TIA

Can C# alone accomplish these enable-disable functionalities ? I guess
some kind of dll import might be in need, I used to use network
interface provided in my C# Exp but failed to static cast the enum type
into the provided interface type.

 

[Willy Denoyette [MVP]]

| My application when run, needs to close all outgoing ports (excluding
| 80,443,25). With packet filtering I've figured out how to block "new"
| traffic, but how do close an existing, established connection - that is,
| some server program that is waiting on connections at a certain port?
|
| TIA
|
|

You can't, unless you are willing to kill the applications having these
ports open.

Willy.