How to unlock Zimbra Accounts
Zimbra immediately locks an account after a configured number of failed login attempts to stop hackers repeatedly guessing passwords until they find the right one. If incorrect passwords reach the configured limit…
THE KNOWLEDGE BASE
All articles.
392 notes on Linux, tools and troubleshooting
Prevent Apache against Dos/DDos attack with mod_evasive
Sending a large number of HTTP requests to a web server is a type of DoS (Denial of Service) attack that increasingly overloads the server until it can no longer serve requests…
Fix a prefix of it is already part of a volume on GlusterFS
When reusing a removed GlusterFS brick, adding it may fail with /path/app or a prefix of it is already part of a volume. Here is how to resolve it.
Fix error when adding datastore in VMware ESXi
Adding a datastore to VMware ESX/ESXi with Add Storage wizard may fail with: An error occurred during host configuration. Call “HostDatastoreSystem.QueryVmfsDatastoreCreateOpt
ZABBIX Monitoring Installation and Consulting Services
ZABBIX is an enterprise monitoring system that goes beyond server and network monitoring. It efficiently monitors servers running any operating system and network devices by combining monitoring and alerts…
Guide for fix incoming mail from outside problems
When you have problems receiving email from outside, it can be difficult to determine where a message sent to your mail server has gone. First check the mail server logs, which can tell you…
Configure SSH Keys authentication with PuTTY
PuTTY is a popular program for remotely accessing Linux. SSH key authentication makes logging in more convenient for system administrators.
How to create Group Contact Lists on Zimbra mail server
Group Contact Lists on a Zimbra mail server are useful for creating contact groups or regularly sending to a particular group, without entering the email address of every recipient.
How to update dell server firmware with Dell Unified Server Configurator
Dell Unified Server Configurator can automatically update Dell server BIOS, network cards, iDRAC, RAID controllers, and other firmware when the server has internet access.