How are DNS Records added dynamically in DNS Servers?
Stephane Bortzmeyer
bortzmeyer at nic.fr
Mon Sep 7 10:09:59 UTC 2015
On Mon, Sep 07, 2015 at 03:33:00PM +0530,
Harshith Mulky <harshith.mulky at outlook.com> wrote
a message of 60 lines which said:
> How do System administrators add DNS Zone records in DNS Servers?
By not using outlook.com for email :-) No, I'm kidding, there are
several ways:
> Is there a specific way the records are added in DNS Servers dynamically?
* a program that you write in the langage of your choice. Every
programming langage has a DNS library and most allows dynamic updates.
* by using an already-written program which does dynamic updates. Many
DHCP servers can do so, for instance.
* using the shell with nsupdate:
#!/bin/sh
nsupdate -kKexample-dyn-update.+157+18685.private -d <<EOF
server nsupdate.example.org
zone dyn.example.org
update delete mylaptop.dyn.example.org
update add mylaptop.dyn.example.org 300 A $new_ip_address
send
EOF
fi
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