Azure Service Bus SAS authentication returning IPs instead of FQDN

Hi,

When authenticating to a service bus using SAS, the SAS service will return two URLs with access tokens in the query string.

The URLs are returned using IPs, e.g http://94.245.122.44/$servicebus/webstream/c34edaa6-4d2e-4fdc-980b-632aa450cfea/. Do you know if it's possible to have these returned using FQDN, so that access can be allowed through a proxy by domain name instead of IP?

Thanks,

Mihai