netstat commands and output on AIX, HP-UX, Darwin, OSF/1

[Henrik Stoerner]

I'm merging some code I got 6 months ago for checking the "netstat"
output for what ports are being used - both for active connections
and listen-ports.

For that, I need the "netstat" commands to put into the client code,
and an example of the output so I can tell the client-module how to
interpret the data.

I'm only interested in TCP ports. I have the data I need for Linux,
Solaris and the BSD variants, but I would like them also for AIX,
HP-UX, Darwin and OSF/1.

So I need:
* The "netstat" command to run to get the set of TCP ports currently
  in use, including ports used for incoming connections. Typically
  this will be some sort of "netstat -na", with some extra options
  to get only the TCP sockets.
  Note that it may be necessary to run two commands to get both
  IPv4 and IPv6 ports. On the BSD's, I noticed that connections 
  to the loopback interface register as IPv6 sockets, not IPv4.

* A sample of the output, so I can see which columns the various
  data go into.


Anyone there who could get me this info ?


Thanks,
Henrik


PS: This lets you setup rules in hobbit-clients to track eg the
    number of connections to your webserver, and put this into
    a graph so you can see the activity over the day. It can 
    also alert you if there is a port 25 open on a server where
    it shouldn't be, or if the number of connections to your
    ssh daemon goes above 20.