Bind9 challenge script for acme.sh

Having found some esoteric and occasionally downright dangerous acme.sh Bind dns challenge implementations floating about the internet, I wrote this very simple script.

In general it ought to be safe for the vast majority of zone layouts and will not hose anything if errors occur.

Vaguely interesting tunable parameters are:

BIND_USER="bind"
ZONE_SN_FORMAT="[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]"
ZONE_DIR="/etc/bind/zones"
TMP_DIR="/tmp"

You might also want to the check the location of:

• rndc
• named-checkzone
• awk
• egrep
• `sed