Getting the "connection refused" and "SSL Version Or Cipher Mismatch" while crawling with Screaming Frog? #screamingfrog

17 March 2020

Google Chrome since version 81 (released in March 2020), removed the support for TLS 1.0 and 1.1 and is asking administrators to immediately enable the TLS 1.2 or later. The full screen interstitial warning is shown to users who visit a website that uses the old TLS. CloudFlare introduced the easy way to implement the …

CloudFlare introduced the easy way to implement the TLS 1.3, a new encryption protocol that improves both speed and security for Internet users everywhere.

Certain legacy crawler configurations may not yet fully support TLS 1.3, preventing crawls on sites utilising this protocol. Google was warning about the incoming change since October 2019.

Getting the "Your connection is not fully secure" message in Chrome? Then your website is using outdated security configuration.

TLS 1.3 is the newest and most secure version of the TLS protocol. It has improved latency over older versions and several new features. TLS 1.3 is currently supported in both Chrome (starting with release 66) and Firefox (starting with release 60) and in development for Safari and Edge browsers.

Both TLS 1.0 and TLS 1.1 are insufficient for protecting information due to known vulnerabilities, hence are insufficient to secure payment card related traffic.

Set the minimum TLS Version to 1.2 in the CloudFlare configuration panel.

We recommend updating your crawler environment to resolve protocol negotiation issues when auditing modern platforms.

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