diff --git a/sec/ex-6_iptables.adoc b/sec/ex-6_iptables.adoc
index 3ded326..0c45916 100644
--- a/sec/ex-6_iptables.adoc
+++ b/sec/ex-6_iptables.adoc
@@ -205,8 +205,41 @@ Now try logging into the machine, with "ssh 'username@remoteserver'", and check
 ----
 
 
+=== run graphics applications remotely 
 
+X11 forwarding needs to be enabled on both the client side and the server side.
 
+- On the client side, the -X (capital X) option to ssh enables X11 forwarding
+
+- On the server side, X11Forwarding yes must specified in /etc/ssh/sshd_config. 
+
+- The xauth program must be installed on the server side. 
+
+
+[source,bash]
+----
+ssh user@192.168.89.5 gimp
+----
+
+=== Copy Files and Directories Between Two Systems with scp
+
+
+To copy a file from a local to a remote system run the following command:
+
+[source,bash]
+----
+scp file.txt user@192.168.89.5:/remote/directory
+----
+
+=== Copy a Remote File to a Local System using the scp ommand
+
+
+To copy a file named file.txt from a remote server with IP 192.168.89.5 run the following command:
+
+[source,bash]
+----
+scp user@192.168.89.5:/remote/file.txt /local/directory
+----