KERNEL='hidraw*', SUBSYSTEM='hidraw', ATTRS='8ACF', TAG+='uaccess' # this udev file should be used with udev 188 and newer (This has been tried under RHEL but not Ubuntu, although it is believed to work similarly – if not you’ll need to check the mapping to custom rules for udev. You can do this by adding the information below to the u2f.rules file in the /etc/udev/rules.d directory.

(1) Make sure udev is set up so that your hidraw device is available. To return the browser string of: Mozilla/5.0 (Windows U Windows NT 5.1 en-US) AppleWebKit/525.19 (KHTML, like Gecko) Chrome/ 1.0.154.53 Safari/525.1 Linux Configuration Once you have it installed, you just have to set a trigger URL. Chrome-based browsers (e.g., Chromium, Vivaldi):.You need a plugin called: “Custom UserAgent String” for your browser. Changing the User Agent String for Firefox, Vivaldi, Opera You may need to make a special configuration to make U2F keys work with Duo using browsers other than Chrome, or under Linux. The following notes are largely plagiarized, based on information provided by a clever person in OIT.

Duo yubikey u2f