Hi all, I'm analizing some behavior of my FC2 installation. This is what appens: ping an address I obtain response from the host. When I run nmap on this host I obtain the result: Starting nmap 3.50 ( http://www.insecure.org/nmap/ ) at 2004-07-08 16:20 CEST Note: Host seems down. If it is really up, but blocking our ping probes, try -P0 Nmap run completed -- 1 IP address (0 hosts up) scanned in 12.126 seconds This is very strange because I'm able to ping the host and is directly connected. If I open another shell and run the tcpdump command the nmap works well Starting nmap 3.50 ( http://www.insecure.org/nmap/ ) at 2004-07-08 16:23 CEST Interesting ports on 168.159.176.115: (The 1654 ports scanned but not shown below are in state: closed) PORT STATE SERVICE 66/tcp open sql*net 135/tcp open msrpc 139/tcp open netbios-ssn 445/tcp open microsoft-ds 8081/tcp open blackice-icecap Nmap run completed -- 1 IP address (1 host up) scanned in 3.021 seconds At the end of the tcpdump sometime I obtain a lot of packets dropped by kernel, but I don't have iptables rules activated. Why my kernel drop some packets? And whi nmap don't work well? Someone know the answer? Thanks in advance to all Bye Ambrogio
