Introduction Security is a top priority in any system, and email is no exception. Zimbra FOSS offers a robust open-source email solution, and setting up two-factor authentication (2FA) is a crucial step to enhance security. This article will guide you through the process of setting up 2FA on Zimbra Zimbra FOSS in a detailed and easy-to-understand manner, ensuring your email accounts are better protected against potential threats. How to Set Up Two-Factor Authentication on Zimbra FOSS Look like Buy Now The work will consist of the following parts: A patch to the login screen to support entering the 2FA code. PrivacyIDEA and PrivacyIDEA LDAP Proxy docker containers to run and maintain the 2FA toekens on your Zimbra* Zimlet for integrating in the web-ui of Zimbra (SOAP based) with extension on the server (java soap api) Install documentation All released under GNU GPLv2. Conclusion Implementing two-factor authentication on Zimbra FOSS not only helps protect your emai

In this tutorial, How to configure Leverage browser caching for nginx. What does Leverage browser caching mean? Page load times can be significantly improved by asking visitors to save and reuse the files included in your website. Reduces page load times for repeat visitors Particularly effective on websites where users regularly re-visit the same areas of the website Benefit-cost ratio: high Access needed You should add that inside of an existing server block. For example, I will add that inside server block /etc/nginx/sites-enabled/default file. server {     listen       80;     server_name  localhost;     location / {         root   /usr/share/nginx/html;         index  index.html index.htm;     }         location ~* \.(js|css|png|jpg|jpeg|gif|ico)$ {             add_header Cache-Control "public, no-transform";             expires         7d;     } } You can test speed up site On GTmetrix

You can Bypass Two-Factor Authentication and Automate Phishing Attacks by New Reverse Proxy Tool call Modlishka. A Polish cybersecurity researcher has released a tool called Modlishka designed for pen testers The tool will help the pentesters, but may also facilitating the APT Groups in phishing Modlishka Feature: Phishing tool that bypasses Gmail 2FA Support for majority of 2FA authentication schemes Support for majority of 2FA authentication schemes (by design). No website templates (just point Modlishka to the target domain - in most cases, it will be handled automatically). Full control of "cross" origin TLS traffic flow from your victims browsers (through custom new techniques). Flexible and easily configurable phishing scenarios through configuration options. Pattern based JavaScript payload injection. Striping website from all encryption and security headers (back to 90's MITM style). User credential harvesting (with context based on URL parameter passe

Introduction Mastering tips and tricks while working with Zimbra can help you maximize the platform's email features. This article compiles useful tips and tricks in a PDF format, making it easy for you to access and apply them in your daily work. Let's explore and enhance your productivity with Zimbra through the practical suggestions shared in this article. Zimbra guilde to see how to use? Blog zimbra share Top 15 Tips & Tricks - Happy new year. Sharing Tips and Tricks with Zimbra Download the guide now to see how to (with easy-to-follow steps and video demos): Search in Zimbra Import Into and Export From Zimbra Change Your Zimbra Preferences Change Your Zimbra Theme Set Zimbra Email and SMS (text) Reminders Enable Mandatory Spellcheck Sort Email Enable Two-Factor Authentication (2FA) Create an Appointment with the Mini Calendar Create an Email Alias, Distribution List or Contact Group Launch an Email in a Separate Window Turn on Zimbra’s Activity Stream

Introduction Discover the world of Linux bin bash shell in this comprehensive guide. Learn from basic to advanced examples, understand shell scripting, and explore frequently asked questions. The Linux bin bash shell is an essential component of the Linux operating system, providing users with a command-line interface to interact with the system. Whether you are a beginner looking to understand the basics or an advanced user seeking to refine your scripting skills, this guide offers a detailed exploration of the bin bash shell. What is the Linux Bin Bash Shell? Understanding the Shell The shell in Linux is a command-line interpreter that executes user commands. The term "bash" stands for Bourne Again Shell, an enhanced version of the original Unix shell created by Steve Bourne. It is the most popular shell in Linux, with its executable located at /bin/bash . Why Use Bash? Versatility : Bash is widely used for its simplicity and power. Scripting : Automate tasks through shell

Introduction While using Zimbra Zimbra , you might encounter the "Client host rejected: Access denied" error, which can disrupt your workflow. This is a common issue that can be resolved easily if you understand the causes and the solutions. This article provides a detailed guide on how to fix this error on Zimbra, helping you quickly resume your work smoothly. Zimbra client host rejected Access denied error log Dec 19 01:21:28 mail postfix/amavisd/smtpd[5106]: NOQUEUE: reject: CONNECT from unknown[192.168.1.113]: 554 5.7.1 <unknown[192.168.1.113]>: Client host rejected: Access denied; proto=SMTP Dec 19 01:21:28 mail postfix/amavisd/smtpd[5106]: lost connection after CONNECT from unknown[192.168.1.113] Dec 19 01:21:28 mail postfix/amavisd/smtpd[5106]: disconnect from unknown[192.168.1.113] Allow the network " 192.168.1.0/24 " of client host for zimbraMtaMyNetworks attribute [zimbra@mail ~]$ zmprov ms `zmhostname` zimbraMtaMyNetworks "127.0.0.0/

Introduction Discover solutions for the common Zimbra ERROR zclient IO ERROR in this detailed guide. From basic troubleshooting to advanced fixes, ensure your email server runs smoothly. Zimbra is a popular open-source email server solution used by many organizations worldwide. However, like any software, it can encounter issues that disrupt its functionality. One such common issue is the " Zimbra ERROR zclient IO ERROR."  This error can cause significant disruptions in email services, impacting communication and productivity. In this comprehensive guide, we'll explore the causes of this error and provide solutions ranging from basic troubleshooting to advanced fixes. Understanding the Zimbra ERROR zclient IO ERROR What is the Zimbra ERROR zclient IO ERROR? The "Zimbra ERROR zclient IO ERROR" is a connectivity issue between the Zimbra client and the server. This error typically indicates problems with network connections, server configurations, or client settin

In this tutorial, I will configure blacklist email based via subject. The recently, I receive an email with the subject "new girls beautiful photo" which contains spam and fake link. how to Zimbra blacklist email with the subject this. Create file chandu.cf in SpamAssassin   folder as root vi /opt/zimbra/data/spamassassin/rules/chandu.cf The content as below header     SPAM_BANNED     Subject =~ / new girls beautiful photo /i describe   SPAM_BANNED     Subject contains me new photo score      SPAM_BANNED     40.0 Save and give owner user and group zimbra chown zimbra:zimbra /opt/zimbra/data/spamassassin/rules/chandu.cf Restarting zmamavisdctl  service su - zimbra -c "zmamavisdctl restart" Have a good nice!

This day, I running vagrant up in my laptop then isuse. I can not start VM in vagrant. My laptop use windows 10. Error code as below: $ vagrant.exe up There was an error while executing `VBoxManage`, a CLI used by Vagrant for controlling VirtualBox. The command and stderr is shown below. Command: ["showvminfo", "600a47e1-9637-4054-89c2-df3e5bf8f691"] Stderr: VBoxManage.exe: error: Code ERROR_MOD_NOT_FOUND 0x8007007E (0x8007007E) - ERROR_MOD_NOT_FOUND 0x8007007E (extended info not available) VBoxManage.exe: error: Context: "GetGuestOSType(osTypeId.raw(), osType.asOutParam())" at line 575 of file VBoxManageInfo.cpp Solve problem There was an error while executing `VBoxManage`, a CLI used by Vagrant for controlling VirtualBox. Step 1: Right click on VirtualBox.exe and select Properties. Step 2: Click the Compatability tab. Click the button that says 'Change settings for all users'. Step 3: In the new window that pops up check '

In this tutorial, How to solve problem "zimbra Error 450 4.7.1 sender reject" on Zimbra MTA. Zimbra Error 450 4.7.1 sender reject as below Feb  10 16:16:33 sd-15xxx postfix/smtpd[1832]: NOQUEUE: reject: RCPT from     unknown[x.x.x.x]: 450 4.7.1 Client host rejected: cannot find your hostname,     [x.x.x.x]; from=<someone@sender.com> to=<someone_email@mydomain.com>     proto=ESMTP helo=<smtp_sender.com> You can check step by step to solve problem as error above Step 1: Check smtpd_sender_restrictions on zimbra MTA. [zimbra@your_mta ~]$ postconf | grep "smtpd_sender_restrictions" Checking reject_unknown_sender_domain,reject_unknown_client_hostname,reject_invalid_helo_hostname is correct  your environment Step 2: Check server port 10031 on zimbra cbpolicy.   tailf /opt/zimbra/log/cbpolicy.log To check the database have lock? sometime due to cbpolicy. You can solve problem anything else? share your error Zimbra Error 450 4.7.1 sender rej