Ports are "imaginary". They are just Layer4 Addesses in the same way an IP#
is a Layer3 Address.
A little backgound to explain what I mean by that:...
A "port" does not exist until an Application starts up that tells the OS's
networking components to "watch" the packets for any that have the correct
Layer4 Address (port) assigned in the Packet. If a packet is found with
that address then it is passed to the Application. So, an IP# is an address
that identifies the Destiantion machine, while "port" is just an address
that identifies the Destination Application that runs on the Destiantion
machine. The two combined together form a "socket".
So what all that means is this:,...if there is no Firewall dropping packets
with that particular Layer4 Address,...then it means there is some kind of
failure involving the Application (APC Powerchute in this case) where it is
not notifying the OS's networking stack of its Layer4 "intensions" which
trigger the OS to watch for packets with that address (aka "activate the
port").
One possible cause could be that something that is already running on the
machine that has already commdeered that Layer4 Address (port). Hoever the
machine would be "listening" on that port in such a case,..it's just that it
would get passed to a different Application,...so I doubt that is the
problem with yours.
--
Phillip Windell
www.wandtv.com
The views expressed, are my own and not those of my employer, or Microsoft,
or anyone else associated with me, including my cats.
-----------------------------------------------------
"Dennis_S" <(E-Mail Removed)> wrote in message
news:470B4C7A-6727-40DD-88C5-(E-Mail Removed)...
>I have eight 2000/2003 servers with APC Powerchute Network Shutdown
> installed. Seems to work fine on all servers except one 2003 server that
> igores the shut down. After talking to support we determined that Port
> 3052
> is not open. How can I open port 3052? It is not being blocked by the
> firewall.
>
> Thanks.
>
> Dennis
>
>
Similar Threads
Linear Mode
