Fix SSL_ERROR_NO_CYPHER_OVERLAP error in Firefox
When browsing internet sites using Firefox, if you find most of the net links blocked, and you receive an mistake code SSL Mistake NO CYPHER OVERLAP, then there is a issue with 1 of the SSL / TLS configurations in the browser. You require to look at on couple of configurations all-around TLS/ SSL to correct this mistake in Firefox.
Shut all the tabs you are working on, and help you save all your function. Subsequent, open up a new TAB, and type about: config to open up configurations of Firefox. If you get a warning, settle for it. The upcoming screen will display all the configuration configurations.
Reset TLS Settings
1] In the search box above the checklist, type TLS. This will expose all the configurations which have TLS configuration. TLS stands for Transportation layer socket.
two] Search for any configurations which have a benefit appearing in Bold. If indeed, it implies that the placing has been adjusted. To restore it back again to default configurations, ideal click on on it, and pick Reset.
Reset SSL Settings
1] Repeat the search in about: config with SSL3. Seem for configuration which has been modified i.e. they will seem in daring.
two] Correct click on on these configurations, and then reset it. You can also double-click on to restore to default configurations. Nonetheless, the two configurations required to be blocked to improve stability. Established them to fake.
Attention-grabbing actuality: These two are associated to the popular Logjam vulnerability which appeared 3 many years in the past.
Alter TLS Version Fallback
Transforming TLS model to bypass is a fantastic choice, but continue to be warned that you should really do not do it for each individual web-site.
- In the about: config part of Firefox, search for stability.tls.model.fallback-limit.
- Alter the benefit to .
- Repeat this for stability.tls.model.min and set value to .
- Examine if you can accessibility the web-site.
Warning: Transforming these values will make your browser less safe. So do it if it is really needed. Make confident to reset it later on.
Server Aspect Difficulty
If this is going on with 1 particular web-site only, its a server facet problem. Only, the server admin can take care of the problem. This typically occurs when a web-site is nonetheless using RC4-Only Cipher Suite, and the configurations in the server ‘stability.tls.unrestricted_rc4_fallback’ desire is toggled to fake.
We have found this mistake documented at moments, for several internet sites like Cloudfare, Sonicwall, Tomcat, IMGUR, Amazon and so on.