looking for port scanner to scan outside IP addresses for open ports

Dan used Ask the Experts™
Hi, I'm looking for a port scanner to scan outside IP addresses for open ports.  I need to go PCI (something to do with taking credit cards) compliant on a few of my sites and this seems to be the first step.

I have found some online that scan a single or small range, but I was looking for a local program that could scan a full range.

It dosen't need to be free, but hopefully not break the bank like GFI.

Thanks all.
Watch Question

Do more with

Expert Office
EXPERT OFFICE® is a registered trademark of EXPERTS EXCHANGE®
Look into Qualys to meet your PCI compliance needs.


do they have a downloadable program, or just through their browser?
It's an actual physical appliance on the network which is accessible through a browser.
11/26 Forrester Webinar: Savings for Enterprise

How can your organization benefit from savings just by replacing your legacy backup solutions with Acronis' #CyberProtection? Join Forrester's Joe Branca and Ryan Davis from Acronis live as they explain how you can too.

Sr Software Engineer
NetTools is a pretty nice suite of tools.  It has nmap in it which you can feed the IP range(s) you want to scan and scan all possible ports.  see if that works for you.
Dave HoweSoftware and Hardware Engineer

really, the only requirement is to have an external account - so, any home ADSL will do - and run nmap, or something larger (such as openvas/nessus) that includes nmap.

nmap 6 just came out too, with full ipv6 support :)
I would do this to see if my ports are open.

Scans some of the ports used similar.

Just type

Scan:***.***.***.*** Then it will scan ports from the outside.

Telnet on the port.
Telnet ***.***.***.*** 25

If it could help you to your answer.
Dave HoweSoftware and Hardware Engineer

There are a wealth of free linux tools out there:

http://nmap.org/6/ - the catagory killer for port scanners

http://www.tenable.com/products/nessus - mostly-commerical vuln scanner, used to be completely free until they got sick of big-name scanning companies piggybacking on their work to sell commercial scanners with their libraries ebeddeed :(

http://www.openvas.org/ - attempt to produce a opensource replacement for nessus, partly successful.

Now, if you want a quick look, it might be worth taking these people up on their one-week trial deal:


for £1 (less than $2) you get a week's use of a virtual linux box, which can run a gui and the above tools, and if you decide to keep it, its £10/month thereafter.


Thanks all, Net Tools did it, downloadable, scans ports and more.

It really does allot, but to do the port scan do the following.

Start – Net Tools Mini – scan tab – enter IP then 1-1028 (or whatever range)

Do more with

Expert Office
Submit tech questions to Ask the Experts™ at any time to receive solutions, advice, and new ideas from leading industry professionals.

Start 7-Day Free Trial