How to find the port number of a server application

[blal]

Hi

I have a IDS(Intruder detection system) server process running on a Unix server.

The IDS system is not functioning now , I doubt some problem in the server process.

As per IDS documentation it says process runs on port number 45000.

Now for testing I did a "telnet ipaddress 45000" from a PC on the same network.It says connection refused.

Now my query is how to find out the port number of the server process running on the server.Is there is any command to find out.

Netstat -a only says information about established connections.

Pls help me.

Regds,
baiju

[Massimo Bianchi]

Hi,
if you know the process name, the better way is using lsof to see what port it holds:

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/lsof-4.67/

or run a port mapper againt the server:

http://hpux.connect.org.uk/hppd/hpux/Networking/Admin/nmap-2.53/

Massimo

[twang]

I think you can only find out what app is 'using' a port, if you have lsof installed, you can issue 'lsof -i TCP:45000; and it will show exactly which process has the port open.

[blal]

Sorry,

This IDS is on sun server, and client from which i am running is hp L class.

Is there any thing like lsof in Solaris.

Thank you,
Baiju.

[Robert-Jan Goossens]

Hi Baiju,

Yes there is,

http://www.sunfreeware.com/

Click on your OS version and search for lsof.

Hope it helps,

Robert-Jan.

[Yogeeraj_1]

hi,

try to download the source and compile the source on the Solaris server.

http://hpux.connect.org.uk/ftp/hpux/Sysadmin/lsof-4.67/lsof-4.67-ss-11.00.tar.gz

regards
Yogeeraj

[Massimo Bianchi]

You can use nmap the same, against she Sun server from the Lclass :)

Massimo

[Yogeeraj_1]

hi,

see also:
ftp://vic.cc.purdue.edu/pub/tools/unix/lsof/README/

and

ftp://vic.cc.purdue.edu/pub/tools/unix/lsof/

regards
Yogeeraj

[RAJESH GANGADHARAN]

Hi Baiju,
You can use a utility called multiscan. You download this in your HP machine and from HP machine you can scan any system for the opened ports.

-RG

[Mark Greene_1]

Most unix systems have the netstat command, I don't know if Sun does or not.

netstat -a will give you a list of all open tcp ports. Some unix implementations have an option, -p, which will map the tcp port to a PID in the ps listing.

mark