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.arpa, rDNS and a few magical ICMP hacks

caminanteblanco

I didn't even realize that half of the parts of the stack mentioned here existed. I'm going through the process of setting up a home server, and this is definitely giving me some ideas for nonsense to implement.

possiblelion

super interesting. the early days of military networks always fascinate me, especially the legacy holdovers like .arpa

ectospheno

Between resolver.arpa, ipv4only.arpa, and the fact that your email won't be delivered to anywhere you actually care about without in-addr.arpa I'm not sure I'd call it legacy.