android - Google Cloud Messaging firewall rules for IP address -


i'm working on implementing notification delivery service through google cloud messaging. service functional in dev environment.

but @ time of configuration in production system, necessary according security policies access internet limited. reason, necessary add rules firewall allow access google's service: "gcm-http.googleapis.com".

during investigation, noticed service provided different ips:

172.217.18.74, 172.217.16.106, 216.58.214.202, 216.58.209.202

at point i'm confused configuration need do. there ip range dedicated service? or necessary add new firewall rules each identified ip?


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