Understanding Remote LANs

When tracerouting to a webserver, there are other computers before you get to it. Others on neighbouring IP numbers. try tracerouting to their webserver, fileserver etc. Try to log what each computer does, and fully understand their network.  

With traceroute any IP that gets timed out with ****.****.****.**** is a firewall or packet filtering router. To work out the IP number of that firewall do these commands-

hping2 -T -t 1 -S -p 80 http://www.server.com

nc -w firewall.server.com

nmap -sS -0 firewall.server.com

more on firewalls later…