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add doc/ipv6-update.md

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Christian Hesse 2020-03-27 21:47:13 +01:00
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Update configuration on IPv6 prefix change
==========================================
[◀ Go back to main README](../README.md)
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](ppp-on-up.md) 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;
See also
--------
* [Run scripts on ppp connection](ppp-on-up.md)
---
[◀ Go back to main README](../README.md)
[▲ Go back to top](#top)

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# Copyright (c) 2013-2020 Christian Hesse <mail@eworm.de>
#
# update firewall and dns settings on IPv6 prefix change
# https://git.eworm.de/cgit/routeros-scripts/about/doc/ipv6-update.md
:local PdPrefix $"pd-prefix";