How do you enable debug mode on a Zimbra server?

To enable debug mode, first stop Zimbra services with 'zmcontrol stop'. Then backup and replace the zmmailboxdmgr file with its unrestricted version. Add JVM debug options via 'zmlocalconfig -e mailboxd_java_options' including the JDWP agent listening on port 8000. Disable the firewall with 'ufw disable' and restart Zimbra services. --- **Related reading:** - [Setting up Zimbra Vulnerability Debugging Environment](/news/setting-up-zimbra-vulnerability-debugging-environment) — original article - [Penetration Techniques - Enabling Anonymous Access Shares on Windows Systems via Command Line](/news/penetration-techniques-enabling-anonymous-access-shares-on-windows-systems-via-command-line) - [Steganography Techniques - Hiding Payloads Using JPEG File Format](/news/steganography-techniques-hiding-payloads-using-jpeg-file-format) - [vRealize Log Insight Vulnerability Debugging Environment Setup](/news/vrealize-log-insight-vulnerability-debugging-environment-setup)