Install PolicyD on Zimbra 8.5 or 8.8 Rumi, September 12, 2023September 12, 2023 Policyd have module quotas. This module can use for limit sending/receipt email. As example just allow sending/receipt email 200 emails/hours/users. If your email server attacked by spam or compromised password some users and used by spammer, the maximum email can be sent as many as 200 emails per hour. This policy will safe your… Continue Reading
Install and Configure Fail2Ban for Zimbra on CentOS 7 Rumi, September 12, 2023 Below is how to install and configure Fail2Ban for Zimbra. In this guidance, I use CentOS. Please adjust python-pip version if using another OS 1. Install pip yum install python3-pip 2. Install dependencies required by Fail2Ban pip3 install pyinotify pip3 install dnspython 3. Download and extract Fail2Ban cd /tmp/ wget… Continue Reading
Remove VirtualBox from Linux Rumi, September 3, 2023 Step 1: Check the VirtualBox Version (Optional) First, check out the Virtualbox installed version by specifying the application package name as “vboxmange” name with the “version” flag: $ vboxmanage –version The Virtualbox installed version is “6.1.38”. Step 2: Uninstall Virtual Box Use the default package manager alongside the “–remove” and… Continue Reading
XOA on XCP-NG import and install Rumi, August 23, 2023 Start a new SSH session to your XenServer host and run the commands below. ### Using curl ### [18:18 xcp-node-01 ~]# bash -c “$(curl -sS https://xoa.io/deploy)” ### Using wget ### [18:18 xcp-node-01 ~]# bash -c “$(wget -qO- https://xoa.io/deploy)” If you are using an old XenServer version, you may encounter SSL… Continue Reading
Fixing Yum Update on Centos 8 Stream Error: Failed to download metadata for repo ‘AppStream’: Cannot prepare internal mirrorlist: No URLs in mirrorlist Rumi, July 24, 2023 I had installed a minimalist CentOS 8 on one of my servers. Installation went successful, however, when I tried to update the system using yum update I see this error message: Failed to download metadata for repo. Below is the complete error. [root@autocontroller ~]# yum update CentOS-8 – AppStream 70 B/s |… Continue Reading
29 organisations listed as ‘critical information infrastructure’ under DSA Rumi, July 18, 2023 The ICT Division on Monday declared 29 organisations as ‘critical information infrastructure’ under the Digital Security Act for the safety of sensitive data under which any illegal access to computers, digital devices or networks is a punishable offence. ‘Critical information infrastructure’ in the controversial Act means any external or virtual… Continue Reading
Set up your site-to-site VPN with Access Server using OpenVPN Rumi, July 9, 2023 Allow access to private subnets Sign in to the Admin Web UI for your Access Server. Click Configuration > VPN Settings. Under Routing, and Should VPN clients have access to private subnets (non-public networks on the server side)?, click Yes, using Routing. Click Specify the private subnets to which all… Continue Reading
Setting up a PPPoE server on Linux CentOS 7 Rumi, July 8, 2023 Method-1 Build PPPoE, success, I think the TM super simple, in CentOS is about 5 steps can be done 1, install PPPoE, after the installation is complete, there will be pppoe-server command Yum Install Rp-pppoe 2, after the installation is completed, will be in the/ETC/PPP directory generated pppoe-server-options files, the… Continue Reading
VNC Client Access on Proxmox KVM guests Rumi, June 30, 2023 Configure VNC Access in the Configuration File Add a line to the VM’s configuration file /etc/pve/local/qemu-server/<VMID>.conf which specifies the VNC display number as follows (“77” in the example below): args: -vnc 0.0.0.0:77 If you want to use password protection, add: args: -vnc 0.0.0.0:77,password=on The display number can be freely chosen,… Continue Reading
Install Zabbix 5.x Monitoring Server on Ubuntu 20.04 Rumi, June 24, 2023 Zabbix is a free, open-source, and high-performance monitoring tool for servers, applications, and network devices. It uses agents to collect system metrics. It also monitors standard services such as SMTP or HTTP services and supports host monitoring via SNMP, TCP, and ICMP checks. It is designed for real-time monitoring of… Continue Reading