Support
| Vendor | Product | NAPTR support? |
|---|---|---|
| ISC | BIND | Yes |
| Cisco Systems | CNR | Yes |
| Daniel Bernstein | djbdns | No (requires patch) |
| Microsoft | Windows Server 2003 DNS Server | No |
| Microsoft | Windows Server 2008 R2 DNS Server | Yes |
| Bert Hubert | PowerDNS | Yes |
| NLnet Labs | NSD | Yes |
| Sam Trenholme | MaraDNS | Yes (as of version 1.4) |
| Unixservice, LLC. | unxsBind | Yes |
| Simon Kelley | Dnsmasq | Yes |
EDNS is required for NAPTR implementations, as extended-length DNS packets are needed to encapsulate queries returning multiple NAPTR records.
Read more about this topic: NAPTR Record
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