I am not sure what the port numbers are being listed there is but they could
be internal to Windows such as ports for filesharing (TCP/IP over Netbios).
But you're right, going to the iana assigned ports is to look up the most
well-known ports. A lot of programs will listen on ports beyond the 1023
range (which is the recommended listening port) such as Napster or Trojan
horses because it would be a pain to have to ask iana for a port assignment
everytime a need arises. Should napster want their program to be included in
the IANA list, they have to register with them but I doubt that they'll be
assigned a legitimate port.
The reason people find out what port it listens in is either going into the
preference option of napster, looking at it in firewall logs, looking it up
through Napster's site. For most people that create certain access lists on
devices that provide internet access (firewall, routers,..), they have to
specifically specify what ports for inbound access and if you don't have
Napster open, it usually will show up in the logs.
If someone wants to access a Metaframe server "inside" the network and wants
you to allow it, you can, for example, go into a newsgroup and ask or
research it yourself by going to Citrix's knowledgebase. By doing to, you'll
find that you need to allow TCP 1494 port and UDP 1604 port.
"Ken" <[EMAIL PROTECTED]> wrote in message
91pmdf$3v6$[EMAIL PROTECTED]">news:91pmdf$3v6$[EMAIL PROTECTED]...
> I did not get any takers on the associate list, so I'll try the main list.
>
> I am a little confused about port numbers. I understand what they are for,
> but I do not quite understand how to track down why a host would be
> listening to a particular port and how to find out who asked for the port
to
> be defined and what the port is being used for. For example netstat -a
from
> my machine shows in part the following
>
> Proto Local Address State
> TCP name:1059 LISTENING
> TCP name:1060 LISTENING
> TCP name:1877 LISTENING
>
> of course there are many others. I understand that to track these down I
go
> to ftp://ftp.isi.edu/in-notes/iana/assignments/ and download the file
named
> port-numbers. I then look for each port shown above and this tells me the
> name of the port and who registered it. For example, port 1059 is named
> nimreg. It was registered by Robert Gordon at austin.ibm.com. Short of
> asking Robert, how do I find out what nimreg is and why a Windows 98 SE
host
> would be listening on such a port.
>
> Also I have seen people on the list ask what port Napster uses for
example.
> People respond back with a number, yet I see no listing for Napster on the
> list I downloaded.
>
> What am I missing here?
>
>
>
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