For a long time on our Philips websites, we have had twitter cards on our pages for summary_image and a couple of weeks ago we changed this to summary_image_large
When trying to tweet a URL of our Philips.com website, it does not show any twitter card anymore, so I tried to use the validator to see what could be the issue. While I know the whitelist could be a false positive, I tried to resubmit a new whitelist authorization with the following URL:
I received back an email that the URL was not accessible, however based on the troubleshooting steps we could not see why not.
The user-agent Twitterbot is not blocked by https://www.philips.com/robots.txt
We saw that during my validation of the URL, the TwitterBot was able to retrieve the URL and got a 200 response
188.8.131.52 - - [08/Nov/2017:08:46:10 +0000] “GET /www.philips.com/a-w/innovationandyou/article/extended-story/a-little-more-action.html HTTP/1.1” 200 20142 “-” “Twitterbot/1.0” “-” “1072_27393||”
We also saw no requests coming in from the IP range as specified (199.59.156.* or 199.59.148.*)
Does someone have an idea what we would have to check as well on top of our investigation to get our website whitelisted (again) for using the summary_large_image twitter cards?