How do I get rDNS working?
You need to get a delegation of the reverse DNS zone, and then configure the zone. If your network is, say, 1.2.0.0/16, “getting a delegation” means having a NS record for 2.1.in-addr.arpa pointing to your nameservers, while “configuring the zone” means inserting the right information in the corresponding zone file in your nameservers. Getting a delegation You get a rDNS delegation from the same entity that gave you the IP addresses: it may be the ISP you are taking connectivity from, or the regional Internet registry of your area. Regional Internet Registries (RIR) have formal procedures for assigning rDNS delegations: follow the links pertinent to your registry. • AFRINIC: How To, Policy for reverse delegation • APNIC: Resource guide, Guide to reverse zones, Troubleshooting • ARIN: Policies, Guidelines (in-addr.arpa nameservers must be indicated in the SWIP templates) • LACNIC: Guide, FAQ • RIPE: General information and How To. Configure the zone For general information about definin
