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Server Ports

Posted on 2014-10-28
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Last Modified: 2014-10-29
Dear Experts,

Today my manager asked me to check which all ports are opened & which all are closed.  Ports which are opened is been used by what. He wants the list i.e. ports- using application name . Do i need to check in each & every server or is it sufficient if i check in Domain server only or if i check in any one of the client computers.
I did run the command netstat -an in one of the client computer. I have attached the image of that. What is this Foreign address (*:*) & [::]:0 . Some local address it shows 0.0.0.0:135 & some other shows 127.0.0.1 . or is there any free tool which can give me all the details.
Note:- I am new to this server world. thats why asking such type of questions
Help Needed urgently.

Regards,

JCT
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Question by:jct_777
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by:MadHatterAdmin
ID: 40408661
Use this application called nmap. It's been around for ages and will scan all the ports of a host and let you know what's open and what's listening. If you do not know common port numbers that a simple google find and depending on the amount of host you have in your network, you should be able to make your manager a happy person in a short amounf of time.

http://nmap.org/

I've also attached a PDF of common ports and their protocols.
common-ports-1-.pdf
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by:jct_777
ID: 40408759
Hi ,

Its not downloading & also  do i need to run this software in all the servers or in anyone of the server or in one  client its  sufficient .

Regards,

JCT
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MadHatterAdmin earned 500 total points
ID: 40408807
no, you can run it from a client and scan different hosts. What's not downloading?
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