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What do the SSLv3 error messages mean on Firefox?
Revision 81947:
Revision 81947 by heyjoni on
Revision 81956:
Revision 81956 by heyjoni on
Keywords:
security
security
Search results summary:
The "Unable to connect securely" message indicates that a website is using an unsafe connection called SSLv3. Learn how to change a setting and connect safely.
The "Unable to connect securely" message displays on websites that use an unsafe connection called SSLv3. Learn to protect yourself against security vulnerabilities.
Content:
Firefox now blocks SSLv3 certificates to protect your information from attacks. SSLv3 (Security Sockets Layer version 3.0) is a type of technology that some websites use to connect to a server. It is no longer secure, which makes it easy for hackers to extract your personal information during a connection.
When you open a page that supports SSLv3, you will see this error message: "Unable to connect securely". You can still access that website by telling Firefox to use a more secure certificate such as TLS.
Here's how to configure Firefox so it will connect using TLS instead of SSLv3:
# Type ''about:config'' in your address bar and press {for win,linux}{key Enter}{/for}{for mac}{key return}{/for}.
#*If you see the ''This might void your warranty'!' page, click {button I'll be careful, I promise!} to continue.
# Find the ''security.tls.version.min'' preference by entering it into the search field.
#;[[Image:sslv3 pref]]
# Double-click to open the ''security.tls.version.min'' preference and change the setting to '''1'''. Click {button OK} to finish.
#;[[Image:change sslv3]]
# Refresh the webpage to load it using the secure certificate.
Firefox {for not fx34}version 34{/for} now blocks SSLv3 certificates to protect your information from attacks. SSLv3 (Security Sockets Layer version 3.0) is a type of technology that some websites use to connect to a server. It is no longer secure, which makes it easy for hackers to extract your personal information during a connection.
{for fx34}
When you access a site that supports SSLv3, Firefox will block it and display this message: "Unable to connect securely". In these cases, please contact the website owner to let them know about the problem.
{/for}
=Additional precautions=
{for not fx34}
Firefox version 34 (currently on Beta) will disable SSLv3 by default. If you are unable to use the latest version, install this [https://addons.mozilla.org/firefox/addon/ssl-version-control/ Mozilla add-on] to disable SSLv3 immediately.
{/for}
To further protect yourself from attacks, keep Firefox [[Update Firefox to the latest version | up to date]]. The simplest way to do this is to set up automatic updates:
# Click on the menu button [[Image:new fx menu]], then click {for win}{menu Options}{/for}{for mac}{menu Preferences}{/for}.
# Click the ''Advanced'' panel in the ''Update'' tab, and make sure that “Automatically install updates” is checked. <!--I can't find this on Ubuntu. Can anyone help?-->