Firebase custom domain shows up Unsupported Protocol flag in the browser

[tyler.vortex]

I’m trying to set up the Firebase hosting + Cloudflare DNS and DNS/LTS.
I’m receiving ERR_SSL_VERSION_OR_CIPHER_MISMATCH error on the browser.

This site can’t provide a secure connection
**staging.panel.xxxxxxxxxxx.travel** uses an unsupported protocol.
ERR_SSL_VERSION_OR_CIPHER_MISMATCH

I’m using two Firebase projects to the same code project
In my another subdomain is working fine: panel.xxxxxx.travel

I set the SSL/TLS encryption mode to FULL, but still seen this issue.

A related topic here:

ERR_SSL_VERSION_OR_CIPHER_MISMATCH

Hi, here I have my website under WordPress with Plugin wp rocked. a certificate ssl lets and scripts. on Cloudflare i have disabled the ssl certificate and every time i activate Cloudflare i always have this error. ERR_SSL_VERSION_OR_CIPHER_MISMATCH and the site is inaccessible can you help me ? thank you in advance my website https: //everymusic.net respectfully jawas

[domjh]

Hi @tyler.vortex,

@tyler.vortex

staging.panel.xxxxxxxxxxx.travel

Makes me think:

Subdomain too deep

This tutorial covers a possible reason for the SSL_ERROR_NO_CYPHER_OVERLAP and ERR_SSL_VERSION_OR_CIPHER_MISMATCH errors (Firefox and Chrome respectively) when seen on a subdomain. The Cloudflare universal certificates cover example.com and *.example.com. This means that it covers any subdomain one level below the domain you signed up with. It will cover www.example.com and subdomain.example.com, as these are one level below the root domain, example.com. The certificate will not cover www.sub…

[tyler.vortex]

I got it. I changed to staging-panel.xxxx.travel and now it’s working.