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How to find a port numbers opened for a remote server

Posted on 2003-11-11
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Last Modified: 2008-03-10
I want to access a remote server using a system management tool.  The system management tool software installed in server is configured for a particular port.  Is there any way to find which all ports are being configured for differennt applications in a remote server?

Thanks in Advance
regards
Rolex
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Question by:rtd73
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juliancrawford earned 84 total points
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by:Pete Long
Pete Long earned 83 total points
ID: 9720940
Hi rtd73,
Finding out what Ports are open

TO find out what ports are open/exposed do the following

Start >Run >type "cmd" {enter}
At the command line type "netstat -a" {enter}

The list displayed shows "Listening ports" and established "Who is on the other end" connections to yout computer.

WARNING
This is a list of common Trojan/Backdoor Port numbers
http://www.sans.org/resources/idfaq/oddports.php


Who is listening? Use this syntax: netstat -an |find /i "listening"
Save who is listening to a text file: netstat -an |find /i "listening" > c:\openports.txt
Who is established? Use this syntax: netstat -an |find /i "established"


Note: In Windows XP, you can type NETSTAT -O to get a list of all the owning process ID associated with each connection: netstat -ao |find /i "listening"


*****Pulist*****

You can use PULIST from the W2K Resource Kit to find the PID and see what process uses it and who started it. For example, you found out that your computer had an open connection to a remote IP address on TCP port 80, and you don't have any Internet Explorer or other browser windows open. You want to find out what process is using that session.
Download: http://www.microsoft.com/windows2000/techinfo/reskit/tools/existing/pulist-o.asp


*****Links*****

Port Assignments for Commonly-Used Services
http://www.microsoft.com/windows2000/techinfo/reskit/samplechapters/cnfc/cnfc_por_simw.asp

TCP/UDP Ports Used By Exchange 2000 Server
http://support.microsoft.com/default.aspx?scid=kb;en-us;278339

Nice shiny Port List :0)
http://hackerwhacker.com/portslist.html

http://www.incubus.co.uk/os/windows/netstat.htm
http://www.petri.co.il/quickly_find_local_open_ports.htm

*****Portscan Software*****

Scan Yourself (Free)

Scan your Ports with Port Detective: lets you scan your PC ports to see which are open, in use, or blocked. This will help you find out how vulnerable your system is to hackers, and will also let you know which ports you can use for applications such as Web servers
http://www.portdetective.com/

Scan Remote COmputers (Free)

Advanced port scanner is a small, fast, robust and easy-to use port scanner for Win32 platform. It uses a multithread technique, so on fast machines you can scan ports very fast. Also, it contains descriptions for common ports, and can perform scans on predefined port ranges. You can use it for FREE. Download now!
http://www.antivirus.com.au/radmin/famatech_nu/portscanner.htm

Cheers!
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by:nonsence
nonsence earned 83 total points
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if you have local access to the server you can install Active Ports (free) and it will tell you what application is running on what port - http://download.com.com/3000-2085-10062969.html?part=65960%20&subj=dlpage&tag=button

so basically, find the exe file for the remote management program you're using and then open active ports and find it in the list and it will tell you what port it is running on.

if you don't have local access, then you can do a scan on the system using nmap - http://www.insecure.org/nmap/nmap_download.html

just type in "nmap -sT -vv 192.168.0.1" or for udp ports "nmap -sU -vv 192.168.0.1"
and change the ip to the ip you want to scan. but if there is a firewall, this will most likely sound the alarm that a port scan is in affect on the remote system so don't be alarmed when or if it happens
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by:Pete Long
ID: 11145116
Hello this question has been open a while please take the time to come back and clean it up.

Closing Questions
http://www.experts-exchange.com/help.jsp#hs5


Best Wishes

Pete
www.petenetlive.com
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