diff --git a/doc/source/manual_tests/networking/Networking_DNAT.rst b/doc/source/manual_tests/networking/Networking_DNAT.rst
index 9bbedd8..c88e7d5 100644
--- a/doc/source/manual_tests/networking/Networking_DNAT.rst
+++ b/doc/source/manual_tests/networking/Networking_DNAT.rst
@@ -2,8 +2,163 @@
 Networking DNAT
 ===============
 
-
-
 .. contents::
    :local:
    :depth: 1
+
+-----------
+NET_DNAT_08
+-----------
+
+:Test ID: NET_DNAT_08
+:Test Title: External Access to VM through UDP-lite.
+:Tags: DNAT
+
+~~~~~~~~~~~~~~~~~~
+Testcase Objective
+~~~~~~~~~~~~~~~~~~
+
+Verify that we have external access to a Virtual Machine using UDP-lite
+protocol.
+
+~~~~~~~~~~~~~~~~~~~
+Test Pre-Conditions
+~~~~~~~~~~~~~~~~~~~
+
+a) 4 VMs
+
+~~~~~~~~~~
+Test Steps
+~~~~~~~~~~
+
+1. Create two port forwarding rules
+
+::
+
+      $ neutron portorwarding-create <router> --inside-addr <addr>--inside-port <port#> --outside-port <port#> --protocol {udp-lite} [--description <user defined string>]
+
+3. Create 2 porforwanding from GUI, admin-> routers -> tenant <id>-router->
+   Port Forwarding-> Add Rule:
+
+::
+
+    public-ip:8080 (upd-lite) -> private-ip 1:80 (VM1)
+    public-ip:8081 (upd-lite) -> private-ip2 1:80 (VM2)
+    public-ip:8082 (upd-lite) -> private-ip3 1:80 (VM3)
+    public-ip:8084 (upd-lite) -> private-ip4 1:80 (VM4)
+
+4. Enable SNAT for the router:
+
+::
+
+      $ neutron router-update tenant<id>-router --external-gateway-info type-dict network_id=<external network id>,enable_snat=true
+
+4. Connect through ssh to VM to make port open to listen.
+
+5. Send upd-list packets to each VM from outside. Verify only the routed VM
+   received packets from outside using the designated port with the specified
+   protocol,
+
+~~~~~~~~~~~~~~~~~
+Expected Behavior
+~~~~~~~~~~~~~~~~~
+
+With the port forwarding, we should be able to send upd-lite packages through
+each VM with the port specification.
+
+-----------
+NET_DNAT_11
+-----------
+
+:Test ID: NET_DNAT_11
+:Test Title: External Access to VM after VM Maintenance
+:Tags: DNAT
+
+~~~~~~~~~~~~~~~~~~
+Testcase Objective
+~~~~~~~~~~~~~~~~~~
+
+Verify that external access to the VM still open after any of the VM
+Maintenance operation such as Live-Migrate, Cold-Migrate and Evacuation.
+
+~~~~~~~~~~~~~~~~~~~
+Test Pre-Conditions
+~~~~~~~~~~~~~~~~~~~
+
+1. Create a Router
+
+2. Launch a VM
+
+~~~~~~~~~~
+Test Steps
+~~~~~~~~~~
+
+1. Create a port forwarding rule
+
+::
+
+      $ neutron portforwarding-create <router> --insde-addr <addr> --inside-port <port#> --outside-port <port#>
+
+2. Perform live migration
+
+3. Evacuate VM
+
+4. Perform cold migration
+
+~~~~~~~~~~~~~~~~~
+Expected Behavior
+~~~~~~~~~~~~~~~~~
+
+After the port rule creation, the instance should keep comunication with the
+compute-controller after regular maintenance operations.
+
+-----------
+NET_DNAT_12
+-----------
+
+:Test ID: NET_DNAT_12
+:Test Title: Access to VM works after Locking operations
+:Tags: DNAT
+
+~~~~~~~~~~~~~~~~~~
+Testcase Objective
+~~~~~~~~~~~~~~~~~~
+
+Verify that VM stills accessible after lock/unlock operations on compute node.
+
+~~~~~~~~~~~~~~~~~~~
+Test Pre-Conditions
+~~~~~~~~~~~~~~~~~~~
+
+1. Create a Router
+2. Launch a VM
+
+~~~~~~~~~~
+Test Steps
+~~~~~~~~~~
+
+1. Create a port forwarding rule
+
+::
+
+      $ neutron portforwarding-create <router> --inside-addr <addr> --inside-port <port#>  --outside-port <port#>
+
+2. Perform evacuate of the VM on the existing compute.
+
+3. Verify access after the lock/unlock operation of the VM, the VM should be
+   reachable. This can be accomplished with a ping to the vm following the port
+   forwarding rule.
+
+~~~~~~~~~~~~~~~~~
+Expected Behavior
+~~~~~~~~~~~~~~~~~
+
+This test should show that the VM is reachable after a normal lock/unlock
+operation, no matter that the compute where it was created with specific port
+rules and forwarding.
+
+~~~~~~~~~~~
+References:
+~~~~~~~~~~~
+
+[0] - [https://docs.openstack.org/newton/networking-guide/intro-nat.html]