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2023-03-28dns: T5115: Support custom port for name servers for forwarding zones.Indrajit Raychaudhuri
This would allow using custom ports in name server operating on non- default port for forwarding zones. This is a follow-up to T5113 for sake of completeness and having consistent treatment of all name servers configured in PowerDNS recursor. Additionally, migrate `service dns forwarding domain example.com server` to `service dns forwarding domain foo3.com name-server` for consistency and reusability.
2023-03-27dns: T5113: Support custom port for name-server forwardersIndrajit Raychaudhuri
Support custom port for name-server forwarders that would allow using custom ports in name server forwarders to enable forwarding to alternative name servers (unbound, stubby, dnscrypt-proxy etc.) operating on non-default port. This would also allow using DNS Over TLS in PowerDNS Recursor 4.6 onwards (pdns doesn't support certificate check for validity yet) by enabling 'dot-to-port-853'. This is set by default if compiled in with DoT support. See: https://doc.powerdns.com/recursor/settings.html#dot-to-port-853 This also partially implements T921, T2195 (DoT without certificate check). Implementation details: - In 'dns/forwarding' configuration, 'name-server' now allows optional 'port' (defaults to 53). - Instead of modifying 'name-server-ipv4-ipv6.xml.i' to add optional 'port', a new file 'name-server-ipv4-ipv6-port.xml.i' has been used to avoid impacting other places where it is reused because not all of them honor ports (mostly VPN related). - The `host:port` entries to be used by PowerDNS recursor config are normalized eagerly at the point of loading VyOS `Config` instead of doing them lazily while rendering the Jinja2 template to keep the implementation less intrusive. The alternative would entail making quite a bit of change in how 'vyos-hostsd' processes 'static' 'name_servers' entries or persists their runtime states.