nmap and ftp proxy problem
Hi
I have to scan a few servers using nmap and nessus to check for problems but I've got a little ftp proxy problem to solve.
The problem is as follows.
I run nmap to scan one of our ips that I know is a dead ip, meaning there is no host for it but it comes back as finding a host and that port 21 was found.
This goes for all our external server ips, every one reports port 21 being available when we know that its not, this goes for ips with and without hosts.
The only thing I can think of is that the ftp proxy in my firewall is causing this to happen. I'm running pf on FreeBSD 7.1-STABLE
The question is, how can I stop nmap and nessus to say that port 21 is open when we know its not, I know I can tell it to not to scan port 21 but that is not the solution I'm looking for.
Thanks
hamba
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