diff options
| -rw-r--r-- | docs/html/google/gcm/gcm.jd | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/docs/html/google/gcm/gcm.jd b/docs/html/google/gcm/gcm.jd index fb57a910dd25..26fc49a33398 100644 --- a/docs/html/google/gcm/gcm.jd +++ b/docs/html/google/gcm/gcm.jd @@ -777,10 +777,11 @@ sent. Optional. The default value is <code>false</code>, and must be a JSON bool <p class="note"><strong>Note:</strong> If your organization has a firewall that restricts the traffic to or -from the Internet, you need to configure it to allow connectivity with GCM. +from the Internet, you need to configure it to allow connectivity with GCM in order for +your Android devices to receive messages. The ports to open are: 5228, 5229, and 5230. GCM typically only uses 5228, but it sometimes uses 5229 and 5230. GCM doesn't provide specific IPs, so you should -allow your server to accept incoming connections from all IP addresses +allow your firewall to accept incoming connections from all IP addresses contained in the IP blocks listed in Google's ASN of 15169.</p> |