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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.
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rfc6147: DNS Extensions for Network Address Translation
from IPv6 Clients to IPv4 Servers
set service dns forwarding dns64-prefix 2001:db8:aabb::/96
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Ability to set wildcard record for authoritative-domain
set authoritative-domain example.com records a any address 192.0.2.11
cat /run/powerdns/zone.example.com.conf
* 300 A 192.0.2.11
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If a parameter is required is determined from the Python string on commit.
This "indicator" is not used consistently and sometimes missing, or added where
it is not required anymore due to Python script improvement/rewrite.
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Makes the powerdns `network-timeout` setting configurable via:
`service dns forwarding timeout`.
The powerdns default is 1500ms, VyOS now explicitly sets the same default value
or the configured value so that the setting can have a readily apparent default
in the help, rather than the user having to know it's powerdns.
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Since introducing the XML <defaultValue> node it was common, but redundant,
practice to also add a help string indicating which value would be used as
default if the node is unset.
This makes no sense b/c it's duplicated code/value/characters and prone to
error. The node.def scripts should be extended to automatically render the
appropriate default value into the CLI help string.
For e.g. SSH the current PoC renders:
$ cat templates-cfg/service/ssh/port/node.def
multi:
type: txt
help: Port for SSH service (default: 22)
val_help: u32:1-65535; Numeric IP port
...
Not all subsystems are already migrated to get_config_dict() and make use of
the defaults() call - those subsystems need to be migrated, first before the new
default is added to the CLI help.
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IPv4 DHCP uses "dns-server" to specify one or more name-servers for a given
pool. In order to use the same CLI syntax this should be renamed to name-server,
which is already the case for DHCPv6.
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Commit bbc2a157 ("xml: completion-help: add helper for all local assigned IP
addresses") added a completionHelper script listing all local assigned
IPv4/IPv6 addresses. This commit extends the system to also list the available
addresses for the source-address CLI nodes.
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pdns_recursor: T2964: Expose query-local-address to dns config.
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In certain split DNS configurations, there is a need for more
fine-grained control over the local address DNS forwarding uses to
issue queries. The current pdns_recursor configuration allows the
recursor to send queries from any available address on the interface
the OS selects for the query, with no option to limit queries to a
particular address or set of addresses.
This commit exposes the `query-local-address` option in
`recursor.conf` to users via the `service` `dns` `forwarding`
`source-address` config node.
If the parameter is unspecified, the default value of 0.0.0.0 (any
IPv4 address) and :: (any IPv6 address) are used to match current
behavior.
Users who want more control can specify one or more IPv4 and IPv6
addresses to issue queries from. Per pdns_recursor docs, the recursor
will load balance queries between any available addresses in the
pools. Since IPv4 and IPv6 are different pools, note that specifying
only one type of address will disable issuing queries for the other
address family.
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Add new nodes for 'service dns forwarding domain':
'addnta': adds addNTA to lua-config-file
'recursion-desired': sets '+' before the zone in forward-zones-file
The migrator sets both options for all configured domains. This is
usually the desired config.
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A lot of XML code is duplicated (VLAN, interface address) for instance. Such
XML definitions should be moved to feature.xml.i files and then just pulled in
via GCC preprocessor #include definition in e.g. bond or ethernet definitions.
This will give us the ability to single-source repeating node definitions as:
* Interface Address
* Interface Description
* Interface Disable
* VLAN (both vif-s and vif-c)
The .in suffix of the interface-definitions is a marker that those files are
input files to the GCC preprocessor. They will be rendered into proper XML
files in the build directory.
Some node definitions have been reworder to remove escaped double quote
occurances which would have been warned about by the GCC preprocessor.
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