LinkedIn post inspector (and consequently link previews when attached to posts) return an error when Proxy is enabled in DNS.
returns “We encountered a server error while trying to inspect the URL”
When the proxy is disabled and set to “DNS only” the request works fine. Presume there is some BOT blocking going on.
Facebooks preview tool appears to work fine
Official Wordpress Cloudflare Plugin is configured with defaults.
Can you let me know how to fix for LinkedIn?
thanks
Hi there,
By default, Cloudflare will allow LinkedIn bot since is a trusted bot:
You only need to make sure your super bot fight mode is set to allow Verified bots under Security > Bots:
If that’s done and the error persists, you might have one of your own custom WAF rules blocking it.
I suggest going to your firewall events under Security > Events and filter for
User agent + contains + linkedin and set the windows to 30mins/Live:
Activity log and see which firewall component blocked it.On an end note, I see that you still have the old managed rules (at least in the zone of yours I’m checking). It’s advisable to upgrade to the new managed rules as there is a performance gain and new signatures detection. (It could even be this blocking LinkedIn)
To upgrade, navigate to Security > WAF > Managed rules > Review configuration > check if everything is ok and press Deploy.
Take care.
Hi - thanks for the reply. I’ve tried the recommended actions but without success, specifically
Setting Firewall events to look for user agent (contains) linkedin returns no results.
I have updated to the new managed rules, but get the same result from the LinkedIn post inspector and again no events flagged in the Security section
Disabling the proxy allows the inspector to retrieve data
Can you advise on any further suggestions?
Hi Simon,
Have you tried the solution described in the link below ?
Try and register the WAV custom rule first to skip the security challenges for the LinkedInBot User Agent.
This worked for us and all LinkedIn Preview posts display an image and no errors and DNS and Proxy is enabled. We also turned on the new Cloudflare settings in Security → Bots → ‘Bot Fight Mode’ turned on, ‘Block AI Bots’ turned on.
Hope this works for your settings as well.
Best regards,
Michel
Fix for me was set in Cloudflare SSL/TLS → Edge certificates → set TLS 1.2
