Namecheap with DynDNS receives "unknown response" after upgrade to 21.7

[eschmacher]

I recently upgraded from 21.1 to 21.7.5. I have one domain set up with namecheap, and recently received a pop up on the lobby page about an error.

The error was:

Code Select Expand

[19-Nov-2021 11:02:30 America/New_York] PHP Warning:  simplexml_load_string(): Entity: line 1: parser error : Document labelled UTF-16 but has UTF-8 content in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[19-Nov-2021 11:02:30 America/New_York] PHP Warning:  simplexml_load_string():  in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[19-Nov-2021 11:02:30 America/New_York] PHP Warning:  simplexml_load_string():                                      ^ in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502

I submitted this error report and then tried forcing dyndns update manually to watch the log. Everything looked fine except for the final line:

/services_dyndns_edit.php: Dynamic DNS: (Unknown Response)

Is this something that got broken during the upgrade from 21.1? Should I consider wiping my dyndns settings and putting it in fresh?

[eschmacher]

So, I started with a fresh install, imported my config, and got the same error.

Then I removed my dyndns config entirely, and added my namecheap account again. Issue immediately returns after save and force update. Maybe namecheap changed something in their response?

[chemlud]

Does the update work anyway? There are other dyndns services out there... ;-)

[eschmacher]

It does update the IP in namecheap, but the "cached IP" in opnsense shows N/A.
Also, there are other dyndns clients plugins for opnsense? I'd rather keep it on my gateway.

[chemlud]

no, I mean there are other dyndns service providers out there, look drop down menu under "Service type" in Services -> Dynamic DNS

Or try "Service type" -> Custom and enter the credentials you have...

[ezhik]

Can confirm, exact same issue here!

[eschmacher]

Can confirm, exact same issue here!

Thanks for chiming in! Seems like an issue with namecheap or the dyndns package then.

[guest18661]

Following, found the same thing.

[iBROX]

Same issue here and it generates a dump file every time has well, have submitted to the team.

Hopefully a fix soon

[franco]

There should be a log line in the system log starting with "Dynamic DNS (namecheap): PAYLOAD". What does it say?

This seems like namecheap changed the response since the code hasn't changed or something with PHP 7.3 -> 7.4 migration. Not sure.


Cheers,
Franco

[iBROX]

This is what my one says :

2021-11-19T01:11:00   opnsense[13440]   /usr/local/etc/rc.dyndns: Dynamic DNS (domain.com): PAYLOAD: <?xml version="1.0" encoding="utf-16"?>

[iBROX]

I also get this just about every day when I log into the web Gui :

PHP Errors:

[25-Nov-2021 00:38:35  PHP Warning:  simplexml_load_string(): Entity: line 1: parser error : Document labelled UTF-16 but has UTF-8 content in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:35  PHP Warning:  simplexml_load_string():  in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:35 PHP Warning:  simplexml_load_string():                                      ^ in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:42  PHP Warning:  simplexml_load_string(): Entity: line 1: parser error : Document labelled UTF-16 but has UTF-8 content in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:42  PHP Warning:  simplexml_load_string():  in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:42  PHP Warning:  simplexml_load_string():                                      ^ in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:42  PHP Warning:  simplexml_load_string(): Entity: line 1: parser error : Document labelled UTF-16 but has UTF-8 content in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:42  PHP Warning:  simplexml_load_string():  in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 00:38:42  PHP Warning:  simplexml_load_string():                                      ^ in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 01:11:00 PHP Warning:  simplexml_load_string(): Entity: line 1: parser error : Document labelled UTF-16 but has UTF-8 content in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 01:11:00  PHP Warning:  simplexml_load_string():  in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502
[25-Nov-2021 01:11:00 PHP Warning:  simplexml_load_string():                                      ^ in /usr/local/etc/inc/plugins.inc.d/dyndns/phpDynDNS.inc on line 1502

[franco]

I would expect these errors to repeat if the issue is indeed not solved ;)

Please try the patch at https://github.com/opnsense/plugins/issues/2666#issuecomment-979154701

It's really just a POC to see if the remote end broken this.


Cheers,
Franco

[chr]

Nice! The patch works for me.

[eschmacher]

This means the issue is on namecheap's end, as I understand it.

I already brought this up to a namecheap rep and they said they're investigating.
https://www.reddit.com/r/NameCheap/comments/qz1mjf/namecheap_dynamic_dns_returning_utf16_encoded/hljqzja