The following commands refuse to work:
* `set system ntp allow-clients address 172.16.0.0/12` (expects IPv4 network)
* `set system ntp allow-clients address 2001:db8::/64` (expects IPv6 network)
* `set service ssh listen-address 2001:db8::2` (IPv4 addresses are working fine)
```
Invalid value
Value validation failed
Set failed
```
Looking at the `node.def` file and the interface show that atleast the IPv6 validator is missing (https://github.com/c-po/vyos-1x/blob/current/interface-definitions/dns-forwarding.xml#L42-L59).
```
$ cat /opt/vyatta/share/vyatta-cfg/templates/service/dns/forwarding/domain/node.tag/server/node.def
multi:
type: txt
help: Domain Name Server (DNS) to forward queries
val_help: ipv4; Domain Name Server (DNS) IPv4 address
val_help: ipv6; Domain Name Server (DNS) IPv6 address
syntax:expression: exec "/opt/vyatta/libexec/validators/ipv4-address $VAR(@)"; "Invalid value"
```
This is just an excerpt from the failing commands.
Looks like an ipv4-network and ipv6-network validator is needed, too.
Commit https://github.com/c-po/vyos-1x/commit/32b6793b210505a2a69dc6f7615ddd5f66ad74b8 caused the problem.