When browsing websites using Firefox, if you lot uncovering most of the spider web links blocked, as well as you lot have an fault code SSL ERROR NO CYPHER OVERLAP, therefore at that topographic point is a occupation amongst i of the SSL / TLS settings inwards the browser. You involve to cheque on few settings around TLS/ SSL to laid this fault inwards Firefox.
SSL_ERROR_NO_CYPHER_OVERLAP
Close all the tabs you lot are working on, as well as relieve all your work. Next, opened upwards a novel TAB, as well as type about: config to opened upwards settings of Firefox. If you lot teach a warning, stimulate got it. The adjacent enshroud volition display all the configuration settings.
Reset TLS Settings
1] In the search box higher upwards the list, type TLS. This volition divulge all the settings which stimulate got TLS configuration. TLS stands for Transport layer socket.
2] Search for whatever settings which have a value appearing inwards BOLD. If yes, it agency that the setting has been changed. To restore it dorsum to default settings, correct click on it, as well as conduct Reset.
Reset SSL Settings
1] Repeat the search inwards about: config amongst SSL3. Look for configuration which has been modified i.e. they volition look inwards bold.
2] Right click on those settings, as well as therefore reset it. You tin equally good double-click to restore to default settings. However, the ii settings needed to hold upwards blocked to ameliorate security. Set them to false.
- security.ssl3.dhe_rsa_aes_128_sha
- security.ssl3.dhe_rsa_aes_256_sha
Interesting fact: These ii are related to the popular Logjam vulnerability which appeared 3 years ago.
Change TLS Version Fallback
Changing TLS version to bypass is a keen option, but stay warned that you lot should do not create it for every website.
- In the about: config department of Firefox, search for security.tls.version.fallback-limit.
- Change the value to 0.
- Repeat this for security.tls.version.min as well as set value to 0.
- Check if you lot tin access the website.
Warning: Changing these values volition brand your browser less secure. So create it if it is real necessary. Make certain to reset it later.
Server Side Problem
If this is happening amongst i detail website only, its a server side issue. Only, the server admin tin resolve the issue. This by as well as large happens when a website is even therefore using RC4-Only Cipher Suite, as well as the settings inwards the server ‘security.tls.unrestricted_rc4_fallback’ preference is toggled to false.
We stimulate got noticed this fault reported at times, for diverse websites including Cloudfare, Sonicwall, Tomcat, IMGUR, Amazon as well as therefore on.
Source: https://www.thewindowsclub.com/
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