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pfSense firewall rules for WhatsApp

Rumi, January 28, 2023

For simplicity, you can also follow the step by step instructions from your pfSense WebGUI below: 1. Create a PORT alias: Firewall -> Aliases -> Ports -> + AddName: WhatsAppPortsTCP Port: 443 -> + Add PortPort: 5222 Save (bottom) -> Apply Changes (top right) 2. Create a URL alias: Firewall -> Aliases –…

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Install Softether VPN Client on Linux

Rumi, January 28, 2023January 28, 2023

Download and Install SoftEther VPN Client Download SoftEther VPN Client software from their official website (https://www.softether.org). Navigate to Download — > Download SoftEther VPN Click on Download SoftEther VPN link. Select Component : SoftEther VPN Client Select Platform : Linux Select CPU : Select the appropriate CPU from the Drop…

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Import and Export Xen VM a.k.a XCP-NG

Rumi, January 27, 2023

Print virtual machine list xe vm-list uuid ( RO)           : 43dfac04-515e-7769-b2d2-444d4b7cb198 name-label ( RW): hk-zabbix-01 power-state ( RO): halted Check the mount disk

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OCI Architecture Diagram Toolkits

Rumi, January 27, 2023

Oracle Cloud Infrastructure (OCI) Architecture Diagram Toolkit in three formats: PowerPoint draw.io Visio Use these assets to draw custom architecture diagrams for your OCI implementation. Each of these formats contains OCI service icons and templates where possible. Examples and guidance on how to create diagrams for your specific cloud deployment…

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Remove Old Unused Kernels in CentOS

Rumi, January 26, 2023

To display the current version of Linux (kernel) running on your system, run this command. # uname -sr Linux 3.10.0-327.10.1.el7.x86_64 List All Installed Kernels on System You can list all kernel images installed on your system like this. # rpm -q kernel kernel-3.10.0-229.el7.x86_64 kernel-3.10.0-229.14.1.el7.x86_64 kernel-3.10.0-327.3.1.el7.x86_64 kernel-3.10.0-327.10.1.el7.x86_64 Removing Old/Unused Kernels on…

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Zimbra Let’s Encrypt auto-renew SSL

Rumi, January 26, 2023

Required for this script to work is certbot package installed on email server and sudo rights to add script in crontab. You can add script in crontab at a weekly run like this: 0 0 * * 0 root /path_to_script. #!/bin/bash #Set domain for renew (in format openthreat.ro) DOMAIN=”” certbot…

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Setup Keepalived for VRRP instead of ucarp

Rumi, January 26, 2023

I’ve the following setup: network-0 – 192.168.2.11 (real) network-1 – 192.168.2.12 (real) I want to add “network” as 192.168.2.10 as the floating address.  I’ll need to do the following to both network-0 and network-1 Install keepalived Configure keepalived Start keepalived Set keepalived to start at boot.

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Hetzner Setups its amazing

Rumi, January 20, 2023
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Proxmox GUI webpage stuck on loading

Rumi, January 8, 2023

Connection time out!!!! So boring nah? I can’t figure out where the problem is. It works and then couple of hours later I’d come back and it keeps on loading forever. SSH works fine, can SSH into containers as well. Just the GUI doesn’t work. Tried full upgrade. Checked for…

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Zimbra Let’s Encrypt SSL Script

Rumi, December 28, 2022

#!/bin/bash -x # SSL certificate installation in Zimbra # with SSL certificate provided by Let’s Encrypt (letsencrypt.org) # Check if running as root if [ “$(id -u)” != “0” ]; then echo “This script must be run as root” 1>&2 exit 1 fi read -p ‘letsencrypt_email [mail@server]: ‘ letsencrypt_email read…

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Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Savvyfrom Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & PKI Naitonal Root and CA Infrastructure. Also engaged with several Offshore Software Development Team.

Worked with Orascom Telecom-Banglalink, Network Elites as VAS partner, BTRC, BTT (Turkey) , Mango Teleservices Limited and Access to Informaiton (A2I-UNDP)

Currently working at Oracle Corporation as Principal Technology Solution and Cloud Architect.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

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