Hello,
I've got a brand new Cisco 1841 router for our SHDSL leased line, basic configured with nothing currently running behind it. Now I wanted to see what nmap (a unix scanning port tool) detects and surprisingly it detects that port 21 (FTP) is open as you can see here below:
% sudo nmap
Starting nmap 3.81 (
formatting link
) at 2006-04-11 23:35 CEST Interesting ports on (): (The 1662 ports scanned but not shown below are in state: closed) PORT STATE SERVICE
21/tcp open ftp
Nmap finished: 1 IP address (1 host up) scanned in 11.328 seconds
Somehow port 21 on our router's IP adresse answers but is not functional (no FTP service). Now haven't seen any FTP service in the router's configuration itself, I am wondering from where does this come and why is that ??? And how can I disable this without configuring an ACL ?
Many thanks
Regards