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153 lines
3.6 KiB
ReStructuredText
153 lines
3.6 KiB
ReStructuredText
Dynamic DNS
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-----------
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VyOS is able to update a remote DNS record when an interface gets a new IP
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address. In order to do so, VyOS includes ddclient_, a perl script written for
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this exact purpose.
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ddclient_ uses two methods to update a DNS record. The first one will send
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updates directly to the DNS daemon, in compliance with RFC2136_. The second
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one involves a third party service, like DynDNS.com or any other similar
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website. This method uses HTTP requests to transmit the new IP address. You
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can configure both in VyOS.
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VyOS CLI and RFC2136
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^^^^^^^^^^^^^^^^^^^^
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First, create an RFC2136_ config node :
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.. code-block:: sh
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edit service dns dynamic interface eth0 rfc2136 <confignodename>
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Present your RNDC key to ddclient :
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.. code-block:: sh
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set key /config/dyndns/mydnsserver.rndc.key
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Set the DNS server IP/FQDN :
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.. code-block:: sh
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set server dns.mydomain.com
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Set the NS zone to be updated :
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.. code-block:: sh
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set zone mydomain.com
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Set the records to be updated :
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.. code-block:: sh
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set record dyn
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set record dyn2
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You can optionally set a TTL (note : default value is 600 seconds) :
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.. code-block:: sh
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set ttl 600
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This will generate the following ddclient config blocks:
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.. code-block:: sh
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server=dns.mydomain.com
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protocol=nsupdate
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password=/config/dyndns/mydnsserver.rndc.key
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ttl=600
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zone=mydomain.com
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dyn
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server=dns.mydomain.com
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protocol=nsupdate
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password=/config/dyndns/mydnsserver.rndc.key
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ttl=600
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zone=mydomain.com
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dyn2
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You can also keep a different dns zone updated. Just create a new config node:
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.. code-block:: sh
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edit service dns dynamic interface eth0 rfc2136 <confignode2>
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VyOS CLI and HTTP dynamic DNS services
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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VyOS is also able to use any service relying on protocols supported
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by ddclient.
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To use such a service, you must define a login, a password, one or multiple
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hostnames, a protocol and a server.
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.. code-block:: sh
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edit service dns dynamic interface eth0 service HeNet
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set login my-login # set password my-password
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set host-name my-tunnel-id
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set protocol dyndns2
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set server ipv4.tunnelbroker.net
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VyOS is also shipped with a list of known services. You don't need to set the
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protocol and server value as VyOS has defaults provided for those. These are
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the services VyOS knows about:
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* afraid
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* changeip
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* dnspark
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* dslreports
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* dyndns
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* easydns
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* namecheap
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* noip
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* zoneedit
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To use DynDNS for example:
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.. code-block:: sh
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edit service dns dynamic interface eth0 service dyndns
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set login my-login
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set password my-password
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set host-name my-dyndns-hostname
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It's possible to use multiple services :
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.. code-block:: sh
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edit service dns dynamic interface eth0 service dyndns
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set login my-login
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set password my-password
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set host-name my-dyndns-hostname
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edit service dns dynamic interface eth0 service HeNet
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set login my-login
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set password my-password
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set host-name my-tunnel-id
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set protocol dyndns2
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set server ipv4.tunnelbroker.net
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ddclient behind NAT
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^^^^^^^^^^^^^^^^^^^
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By default, ddclient will update a dynamic dns record using the IP address
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directly attached to the interface. If your VyOS instance is behind NAT, your
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record will be updated to point to your internal IP.
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ddclient_ has another way to determine the WAN IP address. This is controlled
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by these two options:
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.. code-block:: sh
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set service dns dynamic interface eth0 use-web url
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set service dns dynamic interface eth0 use-web skip
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ddclient_ will load the webpage at `[url]` and will try to extract an IP
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address for the response. ddclient_ will skip any address located before the
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string set in `[skip]`.
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.. include:: references.rst
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