Encrypted ClientHello ECH (beta) causes site not to load in Chrome 117 (which now includes ECH). Error in Chrome 117.0.5938.150 (Official Build) on Windows and Version 117.0.5938.149 (Official Build) on Mac is: ERR_SSL_VERSION_OR_CIPHER_MISMATCH. I was able to get the site working again only by temporarily disabling TLS 1.3. I would like to raise this issue to the Cloudflare team and I am also submitting a bug report to the Chrome team.
Are you able to load https://crypto.cloudflare.com/cdn-cgi/trace/
?
It seems to work for me on 117.0.5938.132 (Official Build) (64-bit)
Result:
fl=583f34
h=crypto.cloudflare.com
ip=[REDACTED]
ts=1697014789.493
visit_scheme=https
uag=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36
colo=HKG
sliver=none
http=http/2
loc=HK
tls=TLSv1.3
sni=encrypted
warp=off
gateway=off
rbi=off
kex=X25519
Cloudflare addressed the issue here: [Preformatted text](https://www.cloudflarestatus.com/incidents/58pmk45447lh)
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