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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
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.