16 Feb
2007
16 Feb
'07
12:36 p.m.
On Fri, 2007-02-16 at 16:27 +0000, michael.dillon@bt.com wrote:
Has anyone implemented a tool that ISPs could use to detect whether or not a NAT/firewall device is present? Perhaps based on OS fingerprinting?
Yes, p0f detects when hosts are behind a nat gateway. -- Daniel J McDonald, CCIE # 2495, CISSP # 78281, CNX Austin Energy http://www.austinenergy.com