Firewall Information and IP Address Ranges
packagecloud.io supports both IPv4 and IPv6
packagecloud.io uses Fastly to cache package objects. You may need to whitelist Fastly's IP Range if you are behind a Firewall.
You can find Fastly's public ip list here
packagecloud.io stores package objects and repository metadata on Amazon's S3 service. You may need to whitelist Amazon's IP ranges to access packagecloud from behind a firewall. The region is
You can find a list of Amazon's public IP Ranges here.
If you are using hostname-based Firewall rules, these are all the hostnames you will need to whitelist.