This past week, I started testing GRE tunneling to allow our elementary schools to access some files on a high school samba server. All the schools have cable modem connections to the Internet (which is its only connectivity). Each school has addresses in the 192.168.x.y range. Security/clear text is not an issue for this need.
We currently make good use of iptables. My question is does iptables INPUT look at the tunneled packets twice, once with the ethx device and once with the device created for the tunnel? If so, is there a port number associated with GRE? Mark Orenstein East Granby, CT School System
