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View Code? Open in Web Editor NEWUpdate dynamic DNS records from netlink
License: MIT License
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Glitch with --interface-family=ipv6
I've noticed a glitch using --interface-family=ipv6: It can happen that a IPv4 address is used for the update.
I have go-nsupdate running using --watch:
/usr/local/bin/go-nsupdate \
--tsig-algorithm=hmac-sha512 --tsig-name=bims.dyn.bl0rg.net \
--interface=eth0 --interface-family=ipv6 --watch bims.dyn.bl0rg.net
Among the IPv6 addresses there was once an IPv4 address used for the nsupdate:
...
Jun 20 11:19:50 bims go-nsupdate[342693]: 2022/06/20 11:19:50 AddrSet iface=eth0: up 2a02:8109:9e40:3f61:11:32ff:fe23:913f
Jun 20 11:19:50 bims go-nsupdate[342693]: 2022/06/20 11:19:50 addrs update...
Jun 20 11:19:50 bims go-nsupdate[342693]: 2022/06/20 11:19:50 update...
Jun 20 11:19:50 bims go-nsupdate[342693]: 2022/06/20 11:19:50 update query...
Jun 20 11:19:50 bims go-nsupdate[342693]: 2022/06/20 11:19:50 update answer
Jun 20 11:20:21 bims go-nsupdate[342693]: 2022/06/20 11:20:21 AddrSet iface=eth0: up 192.168.144.3
Jun 20 11:20:21 bims go-nsupdate[342693]: 2022/06/20 11:20:21 addrs update...
Jun 20 11:20:21 bims go-nsupdate[342693]: 2022/06/20 11:20:21 update...
Jun 20 11:20:21 bims go-nsupdate[342693]: 2022/06/20 11:20:21 update query...
Jun 20 11:20:22 bims go-nsupdate[342693]: 2022/06/20 11:20:22 update answer
Jun 20 11:22:04 bims go-nsupdate[342693]: 2022/06/20 11:22:04 AddrSet iface=eth0: up 2a02:8109:9e40:3f61:11:32ff:fe23:913f
...
@SpComb Any idea how this could happen?
Automatically select interface based on default route
For a laptop with both LAN + WLAN + WWAN etc, use the addresses configured on the interface that matches the default route.
Omit addresses that are not routable
DHCPv6 seems prone to configuring a /128 addr on an interface with no associated IPv6 default route. Those should not be registered as an externally reachable address..
Given, "routable" is a broad concept, but start from somewhere.
Activate GitHub Wiki?
I'm a bit confused because the "Wiki" tab is there but it redirects to the main project page. Could you have a look to activate it? I'd like to contribute a wiki page "How to use go-nsupdate in a systemd service" :)
Use go module dependencies
Use go.mod for reproducible dependencies.
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