I’ve come to ask you for help because I’ve been experiencing a problem for a few days that’s totally blocking me.
Describe the problem/error/question
I’m in the process of creating an automation that should connect and publish content on my WordPress site, but I’m encountering a problem when setting up WordPress credentials. I’m getting the “Service Unavailable” error, but everything’s fine and there’s no problem with the settings. I tested with another site and everything works fine.
Please note that my N8N environment is installed on a server (Contabo).
The only difference with other sites is that this site uses Cloudflare. So I made sure to whitelist the IP address of the N8N server.
But I still get the same “Service Unavailable” message. I’ve looked everywhere and can’t find a solution to my problem. Does anyone have any idea what the problem
Do you have this working now? I have just quickly tried from my self hosted instance to see if I could list the posts which doesn’t tend to need auth and it has worked.
To solve the problem, I decided to change hosts. Indeed, after running several tests, I realized that there was no problem with my sites hosted by Infomaniak.
My current site was hosted by Ionos. I transferred the site to Infomaniak, and the connection now works perfectly.
However, I still haven’t identified the cause of the problem with the other host, which is really very strange.
Ahhh I know the issue with Ionos, They for some reason have a rule enabled to block user agents that are under 4 characters which blocks n8n which is what we use.
I raised a ticket with them over a year ago and they had no plans to change this or add us to the list, We do plan in the future to change our user agent to be more specifc and a bit longer though.
Personally I wouldn’t recommend IONOS to anyone anyway
Thank you ! 
, so I’m in the process of migrating all my sites to another host.