IPv6 addresses contain the colon (:) character. This can be ambiguous in contexts where a colon is used to separate an address and port. For example, in a URL, or in an Enterprise Server listener's configured endpoint.
In those contexts, Enterprise Server follows the standard convention used in URLs of enclosing the IPv6 address in square brackets.
For example, to configure an Enterprise Server listener to listen on the IPv6 address fe80::1ff:fe23:4567:890a and port 12000, you would configure the listener's endpoint as [fe80::1ff:fe23:4567:890a]:12000 .
Similarly, the URL for an HTTPS resource on port 9000 on the local system might begin with https://[::1]:9000/.