diff --git a/README.md b/README.md
index 02b7ae6..c9eedae 100644
--- a/README.md
+++ b/README.md
@@ -85,4 +85,20 @@ api-key = <Your Grafana.net ApiKey>
 raintank-probe -config <path to your config>
   ```
 
+## Note on Private Probe ICMP Health Checks
+By default the private probe will determine its own network health by pinging this comma separated list of sites: google.com,youtube.com,facebook.com,twitter.com,wikipedia.com
 
+If your private network does not allow ICMP traffic to external sites, you will need to modify probe.ini found here
+```
+ /etc/raintank/probe.ini 
+```
+Example probe.ini from docker container
+```
+log-level = 2
+name = demo1
+server-url = wss://worldping-api.raintank.io/
+tsdb-url = https://tsdb-gw.raintank.io/
+api-key = changeme
+health-hosts = icmp-reachable-host.com
+```
+After modifying the health-hosts to an ICMP reachable host, restart. Then the other endpoint checks you have assigned to the probe will begin to execute.