Re: [44net] What ports needed to open for IPIP ?

A clarification: AMPRNet uses IPv4-within-IPv4 encapsulation, as defined by RFC2003 and RFC1853. This is protocol 4. It does not have ports. Protocol 94 is not defined by any current RFC, and is NOT used by AMPRNet. In order to participate in the tunneled sector of the AMPRNet, you must allow protocol 4 to traverse the firewall to and from your gateway machine. Since the source address may be any one of up to 500 different gateways, which vary daily, it is impractical to filter based on inbound source address. - Brian