Disabling weak ciphers and TLS protocol versions

  • Currently I'm using the following command line switches to disable weak ciphers and TLS versions in chrome.
    --ssl-version-min=tls1.2 --cipher-suite-blacklist=0xc007,0xc011,0x0066,0xc00c,0xc002,0x0005,0x0004
    Is there something equivalent that can be used with Vivaldi?

  • Confirmed that the above switches work with the Vivaldi x64 build for Windows

    Edit the Vivaldi shortcut properties and paste this in the Target field

    "C:\Program Files\Vivaldi\Application\vivaldi.exe" --ssl-version-min=tls1.2 --cipher-suite-blacklist=0xc007,0xc011,0x0066,0xc00c,0xc002,0x0005,0x0004

    Launch regedit.exe and edit the http/shell/open/command registry value under HKEY_CLASSES_ROOT and change the (Default) REG_SZ Value to read:

    "C:\Program Files\Vivaldi\Application\vivaldi.exe" --ssl-version-min=tls1.2 --cipher-suite-blacklist=0xc007,0xc011,0x0066,0xc00c,0xc002,0x0005,0x0004 -- "%1"

    This will protect you even if you open Vivaldi by clicking a link in an email or other document.

    You can test your browser to see if the switches are working at https://www.ssllabs.com/ssltest/viewMyClient.html

  • Thanks! 🙂

    You probably already know about these chromium command line switches (many/most of which may work with Vivaldi), but I thought I'd just mention them in case other readers don't.


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