DNS Records, Hostnames & IP Addresses

For a customer allocation using Cisco Secure Email Cloud Gateway, we build the DNS records and associated hostnames as follows:

esa.<alloc>(.<region>).iphmx.com

• “esa” will list all IP Addresses for the allocation

mx1.<alloc>(.<region>).iphmx.com

• “mx1” will list all IP Addresses used in the MX Records

ob1.<alloc>(.<region>).iphmx.com

• “ob1” will list all IP Addresses used by the Hosted Interface, if any

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By removing the results provided in “mx1” and “ob1”, you will have the Outgoing (NAT) IP Addresses.

Example

Using the Dig web interface, let's take a look at an example.

FAQ

What are the regional data centers for Cisco Secure Email Cloud Gateway?

The regions are divided in the following nomenclature:

US: esa.<allocation>.iphmx.com
Europe (UK DC): esa.<allocation>.c3s2.iphmx.com
Europe (Germany DC): esa.<allocation>.eu.iphmx.com
Canada: esa.<allocation>.ca.iphmx.com
Asia/Pacific: esa.<allocation>.ap.iphmx.com

What about load balancing?

Please see: Load Balancer FAQ