[arch-general] Port 80 is shown open in port scan without any web server running

Simon Perry arch at sanxion.net
Wed Mar 30 07:14:21 EDT 2011

 On Wed, 30 Mar 2011 16:18:47 +0530, Partha Chowdhury wrote:

> initially I wanted to know why port 80 is shown open on my machine
> and i gave the lsof output to show that no service was listening to
> port 80 on my machine. The nmap output of the ip - that is my public
> ip at the moment ( got that by visiting whatismyip.com) shows port 80
> as open when it should be blocked according to my iptables
> configuration.
> Basically i was afraid some rootkit/malware was running web server on
> my machine by making it invisible !

 So your machine is, which you have to configure and tell 
 your ISP because they NAT externally from to many internal 
 172.16.37.* users?

 Therefore more than one person could have an external address of mapping back to their 172.16.37.* IP?

 Even though only one person could have mapped back to 

 Are you sure about how this works?

 Simon Perry (aka Pezz)
 [ s a n x i o n . n e t ]

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