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dnsadm

A small shell script to make DNS management slightly easier.

Requirements

  • nsupdate (comes with bind).
  • Permission to read /var/run/named/session.key.
  • Needs to be run locally on the DNS master.
  • update-policy local; added to each zone.

E.g.:

zone "example.com" {
    type master;
    file "db.example.com";
    update-policy local;
};

Usage

dnsadm accepts the following subcommands:

  • add - Add a record.
  • delete - Delete a record.
  • update - Delete, then add a record.

Examples

IPv6

# dnsadm add AAAA foo.example.com 2001:db8::200
;RESULTS
;foo.example.com.            IN      A
foo.example.com.     3600    IN      A       2001:db8::200

# dnsadm update AAAA foo.example.com 2001:db8::201
;RESULTS
;foo.example.com.            IN      A
foo.example.com.     3600    IN      A       2001:db8::201

# dnsadm del AAAA foo.example.com
;RESULTS
;foo.example.com.            IN      A

IPv4

# dnsadm add A foo.example.com 198.51.100.200
;RESULTS
;foo.example.com.            IN      A
foo.example.com.     3600    IN      A       198.51.100.200

# dnsadm update A foo.example.com 198.51.100.201
;RESULTS
;foo.example.com.            IN      A
foo.example.com.     3600    IN      A       198.51.100.201

# dnsadm del A foo.example.com
;RESULTS
;foo.example.com.            IN      A

PTR in-addr.arpa

# dnsadm add PTR foo.example.com 198.51.100.200
;RESULTS
;200.100.51.198.in-addr.arpa.       IN      PTR
200.100.51.198.in-addr.arpa. 3600   IN      PTR     foo.example.com.

# dnsadm update PTR foo.example.com 198.51.100.201
;RESULTS
;201.100.51.198.in-addr.arpa.       IN      PTR
201.100.51.198.in-addr.arpa. 3600   IN      PTR     foo.example.com.

# dnsadm del PTR foo.example.com 198.51.100.201
;RESULTS
;201.100.51.198.in-addr.arpa.       IN      PTR

PTR ip6.arpa

# dnsadm add PTR foo.example.com 2001:db8::200
;RESULTS
;0.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa. IN PTR
0.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa. 3600 IN PTR foo.example.com.

# dnsadm update PTR foo.example.com 2001:db8::201
;RESULTS
;1.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa. IN PTR
1.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa. 3600 IN PTR foo.example.com.

# dnsadm del PTR foo.example.com 2001:db8::201
;RESULTS
;1.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa. IN PTR