Network connection issues (http binding)

Setup, Configuration and Use Beginners
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1 
Platform information:
Hardware: NUC7CJYH with 8 GB RAM and 32 GB SSD + zwave: Aeotec Z-Stick Gen5 (ZW090)
Ubuntu Server 20.04
OH 3.2 stable

Due to problems with my dash buttons, I have renamed my ethernet connection from eno1 to eth0.
See also here:
[SOLVED] Dash buttons not working anymore - Add-ons / Bindings - openHAB Community

Since a reboot I see a lot of http binding thing connection issues like:

2021-12-25 07:57:33.841 [WARN ] [p.internal.http.HttpResponseListener] - Requesting 'http://api.luftdaten.info/v1/sensor/5612/' (method='GET', content='null') failed: 403 Forbidden
2021-12-25 07:57:33.859 [WARN ] [p.internal.http.HttpResponseListener] - Requesting 'http://192.168.68.55/web/cgi-bin/hi3510/' (method='GET', content='null') failed: 404 Not Found
2021-12-25 07:57:36.790 [WARN ] [p.internal.http.HttpResponseListener] - Requesting 'http://192.168.68.34:8080/cgi-bin/admin/getparams.cgi?audioin_c0_mute' (method='GET', content='null') failed: Total timeout 3000 ms elapsed
2021-12-25 07:57:36.791 [WARN ] [p.internal.http.HttpResponseListener] - Requesting 'http://192.168.68.34:8080/cgi-bin/admin/getparams.cgi?event_i0_enable' (method='GET', content='null') failed: Total timeout 3000 ms elapsed
2021-12-25 07:57:36.792 [WARN ] [p.internal.http.HttpResponseListener] - Requesting 'http://192.168.68.34:8080/cgi-bin/admin/getparams.cgi' (method='GET', content='null') failed: Total timeout 3000 ms elapsed
2021-12-25 07:58:03.833 [WARN ] [p.internal.http.HttpResponseListener] - Requesting 'http://api.luftdaten.info/v1/sensor/5612/' (method='GET', content='null') failed: 403 Forbidden
2021-12-25 07:58:03.852 [WARN ] [p.internal.http.HttpResponseListener] - Requesting 'http://192.168.68.55/web/cgi-bin/hi3510/' (method='GET', content='null') failed: 404 Not Found

These http Things used to work before and I did not change the http thing configuration (but recently updated from 3.1 to 3.2).
I also tried a longer timeout (30 seconds), but these errors above still happen).

So I wonder if there is a network setting in OH I did not find yet specifying the ethernet connection name eth0
Could it be also a permissions issue with the new interface name?

Any suggestion would be greatly appreciated.

2

I doubt that your 403 and 404 errors are related to some setting own your machine, since a successful HTTP connection needs to be established to get those error codes. I just tested http://api.luftdaten.info/v1/sensor/5612 and I also receive a “403 Forbidden” in my browser.

Regarding the timeouts: Since they are on the same network as the devices reporting 404 I doubt it’s an issue within openHAB. Can you ping those devices from the openHAB machine? Did you properly set the network mask?

3

Thank you, Jan.

That’s a valid point and I am relieved, that it’s (likely) not an issue with my OH config.

So I tested some things:
Reset of the entire network (router / switches, OH server, …)
And I just found that I have other http binding LAN devices which seem to work.
So I changed the timeout to 60 seconds and this obviously helped.

I don’t know though why my network just turned out to be so slow (I resetted my router / switches) and restarted everything.
So is this just a coincidence?

Maybe a wireshark would help…
Thank you for your help pushing to the right direction.