DDNS: Fix duplicated config variable

README.md

@@ -47,7 +47,7 @@ This task and it's configuration files might be quite specific for the [davd/doc
 Mandatory variables:
 - `ddns_server_domain`: Domain name of the DynDNS server
 - `ddns_passphrase`: Passphrase for updating dynDNS entries
-- `ddns_domain`: Domain where the host's entries are created as `$hostname.$ddns_domain`
+- `ddns_zone`: Domain where the host's entries are created as `$hostname.$ddns_zone`
 
 Optional variable:
 - `ddns_silence`: Set to true to silence stderr too

tasks/dyndns.yml

@@ -15,10 +15,10 @@
     owner: "{{ ansible_user_id }}"
     group: "{{ ansible_user_id }}"
     mode: 0775
-- name: "dyndns - Create cronjob for {{ ddns_domain }} dynDNS script"
+- name: "dyndns - Create cronjob for {{ ddns_zone }} dynDNS script"
   become: yes
   cron:
-    name: "{{ ddns_domain }} dynDNS"
+    name: "{{ ddns_zone }} dynDNS"
     minute: "*/5"
     hour: "*"
     job: "/usr/local/bin/ddns-hosts.sh > /dev/null{% if ddns_silence is defined and ddns_silence is sameas true %} 2>&1{% endif %}"

templates/ddns-hosts.sh

@@ -13,7 +13,8 @@ fi
 ip6addr=''
 ip4addr=''
 if [ $platform = 'linux' ]; then
-  ip6addr=$(ip -6 addr show scope global | grep inet6 | tail -1 | egrep -o '([0-9abcdef]{4}[0-9:abcdef]*)')
+  # only accept global IPv6 addresses (starting with 2 or 3)
+  ip6addr=$(ip -6 addr show scope global | grep inet6 | tail -1 | egrep -o '([0-9abcdef]{4}[0-9:abcdef]*)' | egrep '^[2,3]')
   # filter local IPv4 address ranges (172.16.0.0/12, 10.0.0.0/8, 192.168.0.0/16)
   ip4addr=$(ip -4 addr show scope global | grep inet | egrep -o '([0-9]{1,3}\.){3}[0-9]{1,3}' | grep -Ev '172.(1[6-9]|2[0-9]|3[0-1])' | grep -Ev '10.' | grep -Ev '192.168.' | head -n 1)
 elif [ $platform = 'freebsd' ]; then