Add "Logging into XOS on CloudLab" section.
diff --git a/xos/configurations/cord-pod/README.md b/xos/configurations/cord-pod/README.md
index d5051c9..2bbd614 100644
--- a/xos/configurations/cord-pod/README.md
+++ b/xos/configurations/cord-pod/README.md
@@ -182,3 +182,18 @@
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
2b0bfb3662c7 andybavier/docker-vcpe "/sbin/my_init" 5 days ago Up 5 days vcpe-222-111
```
+
+### Logging into XOS on CloudLab
+
+The VMs created by the install process, including the _xos_ VM, have private IP addresses.
+In order to log into the XOS GUI from your local machine (desktop or laptop),
+you can set up an SSH tunnel to your CloudLab node. Assuming that
+`<your-cloudlab-node>` is the DNS name of the CloudLab node hosting your experiment,
+run the following on your local machine to create the tunnel:
+
+```
+$ ssh -L 8888:xos:80 <your-cloudlab-node>
+```
+
+Then you should be able to access the XOS GUI by pointing your browser to
+`http://localhost:8888`. Default username/password is `padmin@vicci.org/letmein`.