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Sometimes, it is necessary to route internet traffic for performance reasons. If such routing is necessary, one must determine the range of IP addresses used by the cloud provider.

The first step is to discover your cloud provider's endpoint.

If your cloud provider is Amazon S3

Choose your Amazon S3 endpoint location

The routes will be different for every Amazon S3 endpoint location. A list of endpoints can be found on the following page.

Select the endpoint that you use for your backups.

If your cloud provider is Google Cloud Storage

Your endpoint is

After discovering your endpoint

Determine an IP address for the endpoint

Open a command prompt and enter the following command (without the brackets):

nslookup [your location]

The results of the nslookup command will include an IP address currently used for the cloud provider.

In the example below, we used the location and have determined the IP address to be



Non-authoritative answer:    canonical name =    canonical name =

Run a whois query on the IP address

We need to determine the entire range of IP addresses (the NetRange) available for Amazon S3. We can get this range by running a whois query on the IP address we gathered above.

It is usually easiest to run a whois query from a website. We recommend:

In the example below, we have determined the NetRange is to


NetRange: -
OriginAS:       AS16509
NetName:        AMAZON-01
NetHandle:      NET-207-171-160-0-1
Parent:         NET-207-0-0-0-0
NetType:        Direct Assignment
RegDate:        1999-09-23
Updated:        2012-03-02

Once you have the NetRange, you can then route traffic to the cloud IP addresses used by ZCB. This can be used for routing traffic, setting up firewall, and so on.