Hey Dave,
On Linux, nmap and and nmapfe (a GUI to nmap) are quite easy to use. As
root you see a device's open ports using:
% nmap -sS -O 127.0.0.1
The -sS option means it is in SYN stealth mode, which is handy when you
don't want to set off your own traps (this sort of scan is still
detectable, so don't assume you're really invisible). -O will tell you
what OS nmap thinks is running on the device, which is always
interesting.
There are many other options, which 'man nmap' can explain better than
I.
On Tue, 2002-07-23 at 11:09, David Meyer wrote:
> Good Morning,
>
> I wanted to find out if anyone is aware of, or has a favorite port probing
> tool they use to check in the ports on systems. Specifically, I am looking
> for a solid way I can test someone's firewall for them by getting their IP
> address, and then scanning all their ports to find the holes. I am not a
> hacker, just trying to help customers find their weak spots.
>
> Thanks,
>
> Dave
> --
> David R. Meyer
> President
> CRB Technologies, Inc.
> 813-651-4933 (ph)
> 813-389-4529 (mobile)
> david@crbtechnologies.com
> Custom Data Solutions & Consulting
> http://www.crbtechnologies.com
-- Martin C. Messer | marty@redhat.com Red Hat, Inc. | Information Systems & Technologies 1801 Varsity Drive | 919-754-3700 x44148 Raleigh, NC 27606 | 919-931-9815 (mobile)
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