Dynamic DNS with Namecheap

General questions
1

Hi there,

I’ve been trying to configure Dynamic DNS with Namecheap, however I’m struggling as the way to configure that Namecheap expects don’t match what Vyos is requiring.

To start, is demanding a “login” when Namecheap doesn’t use one, I’ve set my Namecheap username but still it fails.

Additionally, we have only the field for “host-name”, although Namecheap seperates Host from Domain.
Here is the docs from Namecheap for manual update: https://www.namecheap.com/support/knowledgebase/article.aspx/29/11/how-do-i-use-a-browser-to-dynamically-update-the-hosts-ip/

Here is my config:

vyos@vyos# show service dns dynamic
 interface eth1 {
     service namecheap {
         host-name ralmworld.com
         login ralms
         password <my namecheap Dynamic DNS password>
     }
 }

And when I check:

vyos@vyos:~$ show dns dynamic status
ip address   :
host-name    : ralmworld.com
last update  : 2020-04-05 03:54:23
update-status: failed

Any help is appreciated,
Thank you.

2

Hi @Ralm, I think you forget to add server

set service dns dynamic interface eth1 service namecheap server <ipv4 or URL>
3

Hi Dmitry,

I didn’t add the server because the documentation mentioned that you only need to in custom configs.
As I already defined the service, shouldn’t be needed right?
https://docs.vyos.io/en/crux/configuration/service/dns.html#vyos-cli-and-http-dynamic-dns-services

Thanks

4

Hi @Ralm, yes, you right!
Can you provide the output of the command for debugging?

show log tail | match ddclient

5

Sure,

Apr  6 16:30:56 vyos ddclient[29534]: WARNING:   Connection: close
Apr  6 16:30:56 vyos ddclient[29534]: WARNING:   Content-Length: 423
Apr  6 16:30:56 vyos ddclient[29534]: WARNING:
Apr  6 16:30:56 vyos ddclient[29534]: WARNING:   <?xml version="1.0"?><interface-response><Command>SETDNSHOST</Command><Language>eng</Language><ErrCount>1</ErrCount><errors><Err1>Domain name not found</Err1></errors><ResponseCount>1</ResponseCount><responses><response><ResponseNumber>316153</ResponseNumber><ResponseString>Validation error; not found; domain name(s)</ResponseString></response></responses><Done>true</Done><debug><![CDATA[]]></debug></interface-response>
Apr  6 16:30:56 vyos ddclient[29534]: FAILED:   updating ralmworld.com: Invalid reply.

Just managed to reproduce this with the browser, as I expected Vyos is not filling the “Domain” property and instead only the host.

On my repro I did this:

https://dynamicdns.park-your-domain.com/update?host=ralmworld.com&password=mykey&ip=127.0.0.1

However the Namecheap documentation asks for the following:

https://dynamicdns.park-your-domain.com/update?host= @ &domain= yourdomain.tld &password= e747d77054a844409c486973cb &ip= 127.0.0.1

6

Can you try the following configuration?

set service dns dynamic interface eth0 service namecheap host-name '@'
set service dns dynamic interface eth0 service namecheap login 'ralmworld.com'
set service dns dynamic interface eth0 service namecheap password '<your password>'
7

That worked.

I will look how to contribute to the docs so I can add this note there.

Thank you.

8

Hey Dmitry, I hope all is well with you

In addition, since the documentation stated that adding the server was only necessary in custom configurations, I did not add it to the list.
In light of the fact that I already defined the service, what’s the point of adding it to the list?