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add doc/update-gre-address.md

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Christian Hesse 2020-03-27 21:51:40 +01:00
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Update GRE configuration with dynamic addresses
===============================================
[◀ Go back to main README](../README.md)
Description
-----------
Running a GRE tunnel over IPSec with IKEv2 is a common scenario. This is
easy to configure on client, but has an issue on server side: client IP
addresses are assigned dynamically via mode-config and have to be updated
for GRE interface.
This script handles the address updates and disables the interface if the
client is disconnected.
Requirements and installation
-----------------------------
Just install the script:
$ScriptInstallUpdate update-gre-address;
... and add a scheduler to run the script periodically:
/ system scheduler add interval=30s name=update-gre-address on-event="/ system script run update-gre-address;" start-time=startup;
Configuration
-------------
The configuration goes to interface's comment. Add the client's IKEv2
certificate CN into the comment:
/ interface gre set comment="ikev2-client1" gre-client1;
---
[◀ Go back to main README](../README.md)
[▲ Go back to top](#top)

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#
# update gre interface remote address with dynamic address from
# ipsec remote peer
# https://git.eworm.de/cgit/routeros-scripts/about/doc/update-gre-address.md
/ interface gre set remote-address=0.0.0.0 disabled=yes [ find where !running !disabled ];