Merge pull request #300 from divialth/feature/customize_sshd_x11forward

allow customization of X11Forwarding

Author: rndmh3ro

README.md

@@ -31,6 +31,7 @@ Warning: This role disables root-login on the target server! Please make sure yo
 |`ssh_allow_tcp_forwarding` | no | `'no'` to disable TCP Forwarding. Set to `'yes'` to allow TCP Forwarding. If you are using OpenSSH >= 6.2 version, you can specify `'yes'`, `'no'`, `'all'` or `'local'`. <br> *Note*: values passed to this variable must be strings, thus values `'yes'` and `'no'` should be passed with quotes. |
 |`ssh_gateway_ports` | `false` | `false` to disable binding forwarded ports to non-loopback addresses. Set to `true` to force binding on wildcard address. Set to `clientspecified` to allow the client to specify which address to bind to.|
 |`ssh_allow_agent_forwarding` | false | false to disable Agent Forwarding. Set to true to allow Agent Forwarding.|
+|`ssh_x11_forwarding` | false | false to disable X11 Forwarding. Set to true to allow X11 Forwarding.|
 |`ssh_pam_support` | true | true if SSH has PAM support.|
 |`ssh_use_pam` | true | false to disable pam authentication.|
 |`ssh_gssapi_support` | false | true if SSH has GSSAPI support.|
@@ -61,7 +62,7 @@ Warning: This role disables root-login on the target server! Please make sure yo
 |`ssh_client_port` | `'22'` | Specifies the port number to connect on the remote host. |
 |`ssh_client_compression` | `false` | Specifies whether the client requests compression. |
 |`ssh_compression` | `false` | Specifies whether server-side compression is enabled after the user has authenticated successfully. |
-|`ssh_login_grace_time` | `30s` | specifies the time allowed for successful authentication to the SSH server | 
+|`ssh_login_grace_time` | `30s` | specifies the time allowed for successful authentication to the SSH server |
 |`ssh_max_auth_retries` | `2` | Specifies the maximum number of authentication attempts permitted per connection. |
 |`ssh_max_sessions` | `10` | Specifies the maximum number of open sessions permitted from a given connection. |
 |`ssh_print_debian_banner` | `false` | `true` to print debian specific banner |

defaults/main.yml

@@ -71,6 +71,9 @@ ssh_gateway_ports: false            # sshd
 # false to disable Agent Forwarding. Set to true to allow Agent Forwarding.
 ssh_allow_agent_forwarding: false   # sshd
 
+# false to disable X11 Forwarding. Set to true to allow X11 Forwarding.
+ssh_x11_forwarding: false   # sshd
+
 # true if SSH has PAM support
 ssh_pam_support: true
 

templates/opensshd.conf.j2

@@ -206,7 +206,7 @@ GatewayPorts no
 {% endif %}
 
 # Disable X11 forwarding, since local X11 display could be accessed through forwarded connection.
-X11Forwarding no
+X11Forwarding {{ 'yes' if (ssh_x11_forwarding|bool) else 'no' }}
 X11UseLocalhost yes
 
 # User environment configuration