Update configuration on IPv6 prefix change
Description
With changing IPv6 prefix from ISP this script handles to update...
- ipv6 firewall address-list
- dns records
Requirements and installation
Just install the script:
$ScriptInstallUpdate ipv6-update;
Your ISP needs to provide an IPv6 prefix, your device receives it via dhcp:
/ ipv6 dhcp-client add add-default-route=yes interface=ppp-isp pool-name=isp request=prefix script=ipv6-update;
Note this already adds this script as script. The pool name (here: "isp")
is important, we need it later.
Also this expects there is an address assigned from pool to an interface:
/ ipv6 address add from-pool=isp interface=br-local;
Sometimes dhcp client is stuck on reconnect and needs to be released. Installing ppp-on-up may solve this.
Configuration
An address list entry is updated with current prefix and can be used in
firewall rules, comment has to be "ipv6-pool-" and actual pool name:
/ ipv6 firewall address-list add address=2003:cf:2f0f:de00::/56 comment=ipv6-pool-isp list=extern;
Static DNS records need a special comment to be updated. Again it has to
start with "ipv6-pool-" and actual pool name, followed by a comma,
"interface=" and the name of interface this address is connected to:
/ ip dns static add address=2003:cf:2f0f:de00:1122:3344:5566:7788 comment="ipv6-pool-isp, interface=br-local" name=test.example.com ttl=15m;