recommended port scanner to help with security risks

[pshootr]

I was wanting to do a port scan on my local network. I would like to run the scanner on a windows machine and scan the ip of my ubuntu server. Can some one suggest a scanner for me?

[tubasoldier]

If you are just looking to scan ports then check out nmap found at insecure.org

[pshootr]

If you are just looking to scan ports then check out nmap found at insecure.org

Thanks for the tip. I did notice nmap in a search, but is seemed to need some dependencies in order to run on windows. I just want a simple port scanner that will run on windows without any dependencies.

[Vantrax]

ethereal might help but nmap really is the way to go.

[jpkotta]

http://nmap.org/book/inst-windows.html

[Sarmacid]

You'd probably prefer zenmap, which is just a graphical front end for nmap.

[cdenley]

Why port scan your ubuntu computer when you can easily see all listening processes?

sudo netstat -tulnp

This way you can see not only what ports you're listening on (tcp or udp) without checking every single port, but it also tells you which process is listening on which port.

[pshootr]

Why port scan your ubuntu computer when you can easily see all listening processes?

sudo netstat -tulnp

This way you can see not only what ports you're listening on (tcp or udp) without checking every single port, but it also tells you which process is listening on which port.

Good point. Thanks for the useful information. I will try it out. Also thanks to all who have responded with suggestions.

[rweaver]

Good point. Thanks for the useful information. I will try it out. Also thanks to all who have responded with suggestions.

The windows port of nmap and netcat are both good also if you end up needing an actual port scanner. Both have good binary distributions you can use.

[erwall]

I can't believe no one has mentioned nessus! It does way more than simple port scanning, it will tell you specific vulnerabilities and most of the time tell you how to fix them.

[Sarmacid]

I can't believe no one has mentioned nessus! It does way more than simple port scanning, it will tell you specific vulnerabilities and most of the time tell you how to fix them.
Yes, Nessus does a lot more than nmap, but nmap is so much simpler.