[CentOS] Strange TCP ports phenomena

On Wed, 2005-08-17 at 15:45, Dominik Składanowski wrote:
> > Sounds like exactly what you're seeing, I know our watchguard firebox proxies FTP connections so it looks like every box has FTP installed even if they don't.

> > 
> > Do you have a router/firewall in front of your server?  If you are using
> > something like http://www.grc.com to scan from the Internet you are
> > probably getting a response from the router/firewall in front of your
> > server not from the server itself.


> Few days ago I had another server on the same IP (it's IP for tests
> before production place), which was FTP server. So maybe that's a reason?

If the current server does not have those ports open they should show as
closed or stealthed.  I believe that you have a device providing NAT in
front of your machine and it has that port open for some reason.  

Is that at an ISP or a home network?