Security Pointers and Tidbits
The main jumping point for security is the Security Center.
Release Specific Settings
Odds and Ends
Here are a few questions that come up from time to time...
An OS Patch/Bug/Vulnerability was announced, is Zimbra affected?
Best practice dictates that you always stay up to date with vendor provided OS patches. Also, be sure to follow OS recommended best practices when applying patches (e.g. restarting affected services, tools like needs-restarting, needrestart and checkrestart may be helpful when trying to understand which processes are using files that were replaced by a patch). When in doubt about the status of a system after a patch, go ahead and reboot to ensure the patches take effect.