Twitter seems not to accept my newly composed wordpress behind nginx with error code
ERROR: Failed to fetch page due to: ChannelClosed
tcpdump -i eth1 -X -e -w test.cap on my psychz VPS. it gets
Sounds the handshakes return with different SSL version.
ssl_ciphers 'ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:!3DES'; from https://wordpress.org/support/topic/twitter-card-images-not-showing/ did not work. So, eventually, I found I didn't switch on the Cloudflare full encryption. Everything is good.