Are you using a DNS Name in the SAN section of your certificate?
> On Jul 22, 2019, at 12:23 AM, Mario Kevo wrote:
>
> Hi,
>
> When SSL is enabled and ssl-endpoint-identification-enabled flag is set
> to true, hostname validation is performed while establishing a
> connection. This includes checking the hostname and IP address in the
> certificate. In past releases, if hostname validation was disabled, a
> warning log message would pop up saying hostname validation will become
> mandatory in future Geode releases. This message has been removed in
> recent releases, but we would still like to check whether there is a
> plan to mandate hostname validation. The reasons for asking are the
> implementation problems in cloud native applications with hostname and
> IP validation. The IP address can change after each restart, and it
> would be extremely cumbersome maintaining that in the certificates. And
> in general, sticking to specific IP addresses doesn’t go in line with
> cloud native principles.
