how to identify what is using a specific port?

On a WIndows 2000 server I have an apps which requires to use port 1100. But
something else is already using the port. It just happened recently. How
can I find out what app or process is using that port? I found the port was
in use by running netstat, which returned a list of local address and foreign
address. Under local address it showed one entry as localservername:1100.
Under foreign address it also showed one entry as mstservice:1100. Any idea?

Thanks.

 

netstat /? will show the options.
netstat -o will show the process. netstat -b shows the executable,
Anthony
http://www.airdesk.com

"Chris" <Chris@discussions.microsoft.com> wrote in message
news:64A30B37-CDC2-4B58-A671-52FCEE26BA4F@microsoft.com...
> On a WIndows 2000 server I have an apps which requires to use port 1100.
> But
> something else is already using the port. It just happened recently. How
> can I find out what app or process is using that port? I found the port
> was
> in use by running netstat, which returned a list of local address and
> foreign
> address. Under local address it showed one entry as localservername:1100.
> Under foreign address it also showed one entry as mstservice:1100. Any
> idea?
>
> Thanks.

 

I wish my server is Windows 2003 so I have -o or -b option. Mine is Windows
2000. How to display the process ID? Here is a list of options:

C:\>netstat /?

Displays protocol statistics and current TCP/IP network connections.

NETSTAT [-a] [-e] [-n] [-s] [-p proto] [-r] [interval]

-a Displays all connections and listening ports.
-e Displays Ethernet statistics. This may be combined with the -s
option.
-n Displays addresses and port numbers in numerical form.
-p proto Shows connections for the protocol specified by proto; proto
may be TCP or UDP. If used with the -s option to display
per-protocol statistics, proto may be TCP, UDP, or IP.
-r Displays the routing table.
-s Displays per-protocol statistics. By default, statistics are
shown for TCP, UDP and IP; the -p option may be used to
specify
a subset of the default.
interval Redisplays selected statistics, pausing interval seconds
between each display. Press CTRL+C to stop redisplaying
statistics. If omitted, netstat will print the current
configuration information once.

"Anthony [MVP]" wrote:

> netstat /? will show the options.
> netstat -o will show the process. netstat -b shows the executable,
> Anthony
> http://www.airdesk.com
>
> "Chris" <Chris@discussions.microsoft.com> wrote in message
> news:64A30B37-CDC2-4B58-A671-52FCEE26BA4F@microsoft.com...
> > On a WIndows 2000 server I have an apps which requires to use port 1100.
> > But
> > something else is already using the port. It just happened recently. How
> > can I find out what app or process is using that port? I found the port
> > was
> > in use by running netstat, which returned a list of local address and
> > foreign
> > address. Under local address it showed one entry as localservername:1100.
> > Under foreign address it also showed one entry as mstservice:1100. Any
> > idea?
> >
> > Thanks.
>
>

 

Can you copy netstat.exe from an XP machine to your server?
Anthony
http://www.airdesk.com


"Chris" <Chris@discussions.microsoft.com> wrote in message
news:E47508C1-E42C-43DA-8F54-16DB7D263055@microsoft.com...
> I wish my server is Windows 2003 so I have -o or -b option. Mine is
> Windows
> 2000. How to display the process ID? Here is a list of options:
>
> C:\>netstat /?
>
> Displays protocol statistics and current TCP/IP network connections.
>
> NETSTAT [-a] [-e] [-n] [-s] [-p proto] [-r] [interval]
>
> -a Displays all connections and listening ports.
> -e Displays Ethernet statistics. This may be combined with
> the -s
> option.
> -n Displays addresses and port numbers in numerical form.
> -p proto Shows connections for the protocol specified by proto;
> proto
> may be TCP or UDP. If used with the -s option to display
> per-protocol statistics, proto may be TCP, UDP, or IP.
> -r Displays the routing table.
> -s Displays per-protocol statistics. By default, statistics
> are
> shown for TCP, UDP and IP; the -p option may be used to
> specify
> a subset of the default.
> interval Redisplays selected statistics, pausing interval seconds
> between each display. Press CTRL+C to stop redisplaying
> statistics. If omitted, netstat will print the current
> configuration information once.
>
> "Anthony [MVP]" wrote:
>
>> netstat /? will show the options.
>> netstat -o will show the process. netstat -b shows the executable,
>> Anthony
>> http://www.airdesk.com
>>
>> "Chris" <Chris@discussions.microsoft.com> wrote in message
>> news:64A30B37-CDC2-4B58-A671-52FCEE26BA4F@microsoft.com...
>> > On a WIndows 2000 server I have an apps which requires to use port
>> > 1100.
>> > But
>> > something else is already using the port. It just happened recently.
>> > How
>> > can I find out what app or process is using that port? I found the
>> > port
>> > was
>> > in use by running netstat, which returned a list of local address and
>> > foreign
>> > address. Under local address it showed one entry as
>> > localservername:1100.
>> > Under foreign address it also showed one entry as mstservice:1100.
>> > Any
>> > idea?
>> >
>> > Thanks.
>>
>>

 

I tried but it keeps asking for additional files. I was able to use tcpview
to find the process. Thanks.

"Anthony [MVP]" wrote:

> Can you copy netstat.exe from an XP machine to your server?
> Anthony
> http://www.airdesk.com
>
>
> "Chris" <Chris@discussions.microsoft.com> wrote in message
> news:E47508C1-E42C-43DA-8F54-16DB7D263055@microsoft.com...
> > I wish my server is Windows 2003 so I have -o or -b option. Mine is
> > Windows
> > 2000. How to display the process ID? Here is a list of options:
> >
> > C:\>netstat /?
> >
> > Displays protocol statistics and current TCP/IP network connections.
> >
> > NETSTAT [-a] [-e] [-n] [-s] [-p proto] [-r] [interval]
> >
> > -a Displays all connections and listening ports.
> > -e Displays Ethernet statistics. This may be combined with
> > the -s
> > option.
> > -n Displays addresses and port numbers in numerical form.
> > -p proto Shows connections for the protocol specified by proto;
> > proto
> > may be TCP or UDP. If used with the -s option to display
> > per-protocol statistics, proto may be TCP, UDP, or IP.
> > -r Displays the routing table.
> > -s Displays per-protocol statistics. By default, statistics
> > are
> > shown for TCP, UDP and IP; the -p option may be used to
> > specify
> > a subset of the default.
> > interval Redisplays selected statistics, pausing interval seconds
> > between each display. Press CTRL+C to stop redisplaying
> > statistics. If omitted, netstat will print the current
> > configuration information once.
> >
> > "Anthony [MVP]" wrote:
> >
> >> netstat /? will show the options.
> >> netstat -o will show the process. netstat -b shows the executable,
> >> Anthony
> >> http://www.airdesk.com
> >>
> >> "Chris" <Chris@discussions.microsoft.com> wrote in message
> >> news:64A30B37-CDC2-4B58-A671-52FCEE26BA4F@microsoft.com...
> >> > On a WIndows 2000 server I have an apps which requires to use port
> >> > 1100.
> >> > But
> >> > something else is already using the port. It just happened recently.
> >> > How
> >> > can I find out what app or process is using that port? I found the
> >> > port
> >> > was
> >> > in use by running netstat, which returned a list of local address and
> >> > foreign
> >> > address. Under local address it showed one entry as
> >> > localservername:1100.
> >> > Under foreign address it also showed one entry as mstservice:1100.
> >> > Any
> >> > idea?
> >> >
> >> > Thanks.
> >>
> >>
>