who is blocking a port

I need to know who is blocking a port in my network? what software can tell me who is blocking the port.
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Uhm, i guess we're talking about a business environment.
If it's properly designed then the sysadmins are the ones who can block a port (and all persons who have access to the firewall :))
Christopher Raymond MendozaCommented:
I think you need to be a bit more specific. Like port number and stuff.
lennykatzAuthor Commented:
What ports # do i have to open to make a vpn in server 2008 with one nic?
lennykatzAuthor Commented:
partially cover
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