IT support and troubleshooting

Learn to set up port forwarding to access an office RDS server from home by mapping external port 4444 to internal port 3389 via a router, using TCP and RDP.

Scan a router's ports with Zenmap, the Nmap GUI, using an intense scan to identify open ports like 4444 and assess dos or ddos risks to judge port forwarding safety.

Explore how VPN secures connections between home and office using client-to-site and site-to-site tunnels, comparing PPTP, L2TP/IPsec, and OpenVPN with diffie-hellman key exchange, AES, DES, and related ports.

Configure a pptp vpn on a DrayTek 2927 by enabling remote access, creating a user profile with username and password, and testing in Windows 11 using the router's static IP.

Configure and test a L2TP/IPsec vpn on the vigor router, using a preshared key or user credentials with chosen encryption, then connect from Windows 11 and verify the connection.

Configure an OpenVPN profile by generating a certificate, exporting a config with a static IP address, downloading the free OpenVPN client, and testing the VPN against the router.

Strengthen router security by using a strong password and username; use https or ssh, enable vpn, disable ping, change the management port to 40002, and enable brute-force protection and tls/ssl.

Protect your router against attacks and scans by configuring firewall defense rules, enabling syn flood prevention, blocking spoofed and malicious packets, and whitelisting trusted IPs.

Block country-based traffic and icmp packets by configuring the firewall. Create IP objects and groups, set an implicit deny default rule, and add WAN-to-LAN rules using country and icmp objects.

Set application traffic priority with quality of service and bandwidth management to prioritize smb data sharing and sql databases, and configure default maximum sessions by IP v4/v6 addresses with scheduling.

Learn to create a vlan for wifi guest access, isolating it from lan one, and configure the router with a dhcp pool, gateway, and dns for internet access.

Configure a tagged vlan 9 on the router and SG250 switch to isolate the monitoring network from the main LAN, and secure access via VPN instead of port forwarding.

Join a pc from a workgroup to the XYZ.local domain and migrate the existing user profile to a domain profile using the forensit user profile wizard, preserving apps and settings.

Create and link group policy objects to apply domain password and lockout policies, configure password history, length, and complexity, and force password changes via gpupdate and gpresult.

Create a dedicated help desk admin group with a 10-character password policy in Active Directory, assign it to local administrators via a GPO, and test access on office computers.

Set up gpo-based screen saver after 15 minutes of inactivity, require a password, and block cd usage on office computers.

Create a shared server folder with an office documents area for all office workers and a top secret area for the boss, then enable auditing via a domain GPO.

Deploy an rds server in the xyz lab network and grant the remote workers group the right to log on remotely, verifying that remote workers can access while non-members cannot.

Learn to harden RDS security against insider threats by restricting non-admin users with GPO configurations on domain and stand-alone servers, including control panel and PowerShell restrictions.

Edit the RDP-tcp registry key to change the default port from 3389 to 4545 as a decimal value, then reboot to apply the change.

Configure Windows firewall inbound rules for TCP port 4545, enabling domain and private networks, and verify the connection from the office PC.

Troubleshoot intermittent remote session ends by lowering display quality and color depth, adjust local resources, and disable smart cards and Windows Hello security keys, then save the RDP file.

Learn to troubleshoot remote desktop licensing errors by recreating the MSlicensing registry key, backing up the system state and registry, exporting and importing the registry, and using a restore point.

fix remote desktop freezing by adjusting two registry keys: set client disable UDP to 1 and set hardware mode to 0, using regedit or scripts, then reboot the PC.

Learn how to change an expired password on an RDS server remotely, using ctrl+alt+end, and edit the RDP file to enable saved credentials for automatic login.

Replace the failed 2 TB drive in a Synology raid 1, rebuild the array, and increase capacity to 6 TB without data loss using healthy drives.

Learn how to create a shared folder on a Synology NAS, configure permissions, encryption, and backup-focused access control with an admin user and a restricted copy user.

Install Windows Server Backup through Server Manager by adding roles and features, selecting Windows Server Backup, then complete installation and use the Windows Server Backup Tool.

Learn to back up single files or system state with Windows Server Backup. Save copies to a remote share and recover using shadow copies.

Create a batch script using wbadmin to back up critical and system state files to a network share, store credentials, and automate with Windows task scheduler for weekly backups.

Learn how to perform single file recovery from a Windows server backup and execute bare metal recovery using a system image to restore a server from the E drive.

Secure the office shared folder by copying it to the nas backup folder with versioning, and automate backups using a batch script and Hyper Backup.

Install and configure PuTTY to enable SSH access to a Synology NAS, verify port 22, save the session, accept the certificate, then log in and browse volume1.

Develop a bash backup script for Synology that copies files with a date in the name and deletes copies older than 50 days using find and rm -r.

Learn to configure Synology Drive Server and Client for PC backups on a NAS with version control and a six-copy retention policy, enabling continuous backup and restoration.

learn to back up shared folders from a file server using Synology Active Backup for Business, including SMB backups, shadow copies, and retention policies.

Learn to set up synology active backup for pc, install the backup agent, create a partition-based backup task, and save image backups to the nas with encryption and scheduling.

Execute the security advisor to assess your Synology NAS, adjust security baselines, change the default ssh port, and strengthen admin and network protections.

Learn how to recover and view email passwords and settings across major clients using NirSoft's mail pass view, including Outlook and Thunderbird, with practical tips for security prompts.

Learn to create a batch script that zips data with a date-based filename, automatically removes backups older than 30 days, and configure 7zip in the system path.