By default each project is permitted a single public IPv4 address due to the world-wide shortage of IPv4 addresses but it is possible to work around this limitation. Projects do not have a quota for a floating IP initially, but can request one as laid out in the Requesting, Allocating and Associating Floating IPs section in our Guide.

Below we lay out the ability to create and use a proxy instance to route your traffic to different instances using a single IPv4 address.

Proxy instance

If offering a public service such as a web application is required, setting up a proxy host instance will permit inbound traffic directed at the public IPv4 address to be redirected to an appropriate instance based on the port number requested. For example, all traffic for port 80 will be directed to an instance running apache and ports 2200 can be set up to forward ssh traffic to the internal instance allowing terminal access.

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