nginx closes connection when the Host value is unknown (no zimbraVirtual* set)

[L. Mark Stone]

Hello guys,
In ZCS 8.8 we make some changes on the way nginx behaves, we included this and be controlled with the command - zimbraReverseProxyStrictServerName, available starting ZCS 8.8.6 and above.

More information about the topic can be found here:

• https://bugzilla.zimbra.com/show_bug.cgi?id=108299
• https://github.com/Zimbra/zm-nginx-conf/pull/8
• https://github.com/Zimbra/zm-mailbox/pull/399
• https://github.com/Zimbra/zm-build/pull/64

As the GA Release we have is ZCS 8.8.5, we will need to wait a few weeks until 8.8.6 goes out.

Best regards

And if you can't wait, you can use Malte's workaround in the 108299 bug and reference my example application of this workaround above.

Thanks Zimbra for slotting in the github commits to help us address this issue.

Best regards to all,
Mark