HTTP Loopback - where the server couldn't access the site which is hosted in the same server

[dsp76]

Actually another WordPress Plugin also means, that the Rest API is not activated.
I know its working from using Insomnia / Postman, but the plugin within the WordPress instance can't reach the API of the same instance.

[girish]

@dsp76 mm, but curl working means that http lookback is indeed working though. Let me see if I can reproduce this. I guess I just install the plugin and the error shows up in the diagnostics?

[girish]

I have been searching for the last 5 minutes but where is the diagnostics screen in IWP?

[girish]

Unfortunately, I couldn't find it. Let me know where this diagnostics screen is.

Also, are you using Cloudflare or some other proxy?

[dsp76]

That was the response of WPML:

Located here: /wp-admin/admin.php?page=sitepress-multilingual-cms%2Fmenu%2Fsupport.php
Meanwhile, it shows REST API supported. I wish I had saved a screenshot... it makes me look like a fool

No cloudfare etc., all is directly connected.

[dsp76]

Actually, the diagnosis came from the IWP server component. It still says:

[girish]

@dsp76 said in HTTP Loopback - where the server couldn't access the site which is hosted in the same server:

Located here: /wp-admin/admin.php?page=sitepress-multilingual-cms%2Fmenu%2Fsupport.php

Ah, looks like this from some other plugin and not IWP (per the url) ?

[dsp76]

Exactly, I had trouble with two plugins at the same time:

1. WPML (sitepress-mulilingual-cms)
2. InfiniteWP

For WPML - not sure if that was related to HTTP Loopback - the API is again reachable.
InfiniteWP still complains about the loopback issue.

I will give it a try with another WP Instance later today. Will report back.

[girish]

Atleast, InfiniteWP works fine for me in WordPress Developer . Can you try in that?

I could not install it in Managed WP. It wants to install it in the iwp subdirectory. This is not allowed in the managed WP package.

[dsp76]

Hi @girish - we again run in this issue, while we choose a workaround in January.
We can't connect from infiniteWP Panel (installed in this instance) to a LAMP instance.

We came back to the loopback issue, which was also mentioned in the IWP diagnostics:
https://support.infinitewp.com/support/solutions/articles/195234-error-while-adding-a-wordpress-site-to-the-infinitewp-admin-panel

Should we be able to connect from one Cloudron App to another? We even tried with the Instance "local" IP address, but had no luck.

[girish]

@dsp76 yes, apps can connect to each other with the domain name. Can you see if you can curl https://lamp.domain.com from the Web Terminal of the infiniteWP app instance?

[dsp76]

Right, that seems to work. Looks like something within infiniteWP is the issue? I will contact their support. I wonder why the loopback check within infiniteWP fails.

[girish]

@dsp76 yes, I am happy to debug the issue with them, if they can give us hints on how to debug the issue on their side with cURL or equivalent.

[chriskloss]

Response from IWP: https://support.infinitewp.com/support/tickets/497259

"I had a developer look into this issue, and he confirmed that our code was having trouble detecting the HTTP Loopback request.
So, I kindly request you ignore the HTTP loopback status on your IWP admin panel."