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Hi all:
I am looking for a software that will find all the open ports in a network and what services associated with those ports. Or even find out if a particular port is open in any host of my network?
Thanks in advance.
Waiting for your kind response.
Distribution: OpenBSD 4.6, OS X 10.6.2, CentOS 4 & 5
Posts: 3,660
Rep:
Ehhh, how large of a "network" are you talking about? Nmap performs pretty well for scanning a few thousand addresses, from my experience. For networks larger than that, you're either talking a major corporation, who has enough money to spend on commercial products that do the same thing (most of them have nmap code built-in, but with better management, distributed scanning, etc) or you're talking about scanning The Internet, in which case you shouldn't be doing it.
Hi, thanks for your reply.
I am talking about around 5000 users. So what commercial product will be best suite for this as you are saying it will support thousand users seamlessly? Though I was looking for something free.
Also, take note that, depending on your needed time frame, nmap can handle very large networks. It's possible (just not fast) to nmap 32,000 machines (trust me).
Thanks for all the help.
First I will try NMAP then, if not possible, will go for commercial products as I wont be searching the whole 5000 users at once.
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