The OpenSSL project is releasing a critical fix for OpenSSL version 3.x. Zimbra is using OpenSSL version 1.1.1q which is an older still supported version of OpenSSL. The version in Zimbra is not affected by the fix, which means no patches are needed for Zimbra. You should install operating system security updates and other 3rd […]
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Briefcase update Zimbra Collaboration Kepler 9.0.0 Patch 27
In Zimbra Collaboration Kepler 9.0.0 Patch 27. Briefcase is now accessible in single click after login. Briefcase was removed from the Cloud Storage option and a standalone icon was added for Briefcase. How to edit a file in Briefcase With Zimbra Docs, you can edit documents, spreadsheets and presentations in Briefcase in both Classic and […]
Zimbra Patches: 9.0.0 Patch 27 + 8.8.15 Patch 34
Hello Zimbra Friends, Customers & Partners, Zimbra 9.0.0 “Kepler” Patch 27 and 8.8.15 “James Prescott Joule” Patch 34 are here. The patches include What’s New, Security Fixes, Fixed Issues and Known Issues as listed in their respective release notes. Please refer to the release notes for the patch installation on Red Hat and Ubuntu platforms. […]
Zimbra and Nextcloud deepen integration
Many users run both Zimbra and Nextcloud services and for this reason Zimbra and Nextcloud are partnering up to bring users a better experience. Nextcloud and Zimbra share a common mission – providing the best digital collaboration tools, and keeping data private. That’s why it makes sense for Zimbra and Nextcloud to work together to […]
Zimbra Email Security Webinar Series: TLS and DANE (updated)
Many Zimbra administrators have setup TLS encryption to protect their users’ login credentials and email in transit. But TLS is a complex standard, and often unknowingly misconfigured. Deploying TLS correctly does not require a university degree in cryptography, but rather a working knowledge of some key concepts and awareness of pitfalls to avoid. And, with […]
Configuring Fail2Ban on Zimbra
This article is a how-to guide on installing Fail2Ban to block attacking hosts using a null route or blackhole routes. This can help mitigate brute force attacks on Zimbra. Especially brute force attacks on SMTP are very common. Prerequisite: Fail2ban has been tested in combination with netfilter-persistent and iptables. If you use ufw or firewalld […]