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XCCDF
Guide to the Secure Configuration of Ubuntu 16.04
Services
SSH Server
Configure OpenSSH Server if Necessary
Enable Encrypted X11 Forwarding
Enable Encrypted X11 Forwarding
An XCCDF Rule
Details
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Enable Encrypted X11 Forwarding
High Severity
By default, remote X11 connections are not encrypted when initiated by users. SSH has the capability to encrypt remote X11 connections when SSH's
X11Forwarding
option is enabled.
To enable X11 Forwarding, add or correct the following line in
/etc/ssh/sshd_config
:
X11Forwarding yes