How to Reset SIC in Check Point Firewall
Step-by-step guide to reset Secure Internal Communication (SIC) between Check Point Management Server and Gateway, fix trust issues, and re-establish secure connectivity.
Network Security Tools & Configuration Hub
Your one-stop destination for network security device configurations, tools, and best practices.
Latest Network Security Articles
Stay updated with the latest configuration guides, best practices, and security insights.
Cisco17-02-2026
What is SVI? Difference Between SVI and VLAN Explained
Learn what a Switched Virtual Interface (SVI) is, how it works on Layer 3 switches, and the key differences between SVI and VLAN including inter-VLAN routing, management SVI configuration, and real-world Cisco examples.
Cisco13-02-2026
How to Extend Console Cable Using Cat6: Complete Guide with Multiple Methods
Learn how to extend Cisco console cable connections using Cat6 structured cabling. Detailed guide covering patch panel method, RJ45-to-DB9 converter method, and direct extension techniques for desk-based console access.
Cisco31-01-2026
Cisco DHCP Snooping: Complete Configuration Guide with Examples and Troubleshootin
Learn how to configure DHCP Snooping on Cisco switches to prevent rogue DHCP servers and DHCP-based attacks. Complete guide with configuration examples, verification commands, troubleshooting, and best practices.
Cisco31-01-2026
How to Upgrade Cisco Catalyst 2960 Switch IOS: Complete Step-by-Step Guide
Learn how to upgrade Cisco Catalyst 2960 switch IOS firmware with this comprehensive guide. Includes prerequisites, backup procedures, upgrade methods via TFTP/USB, verification steps, and troubleshooting tips.
Check Point
30-01-2026
How to Create Domain Objects in Check Point Firewall
Learn how to create and manage Domain Objects in Check Point Firewall, including FQDN vs Non-FQDN objects.
Basic Networking26-01-2026
Understanding DNS: A Practical Guide to Domain Name System Records and Security
A concise practical guide explaining DNS, its record types, and how to manage and secure your domain’s DNS configuration.
Basic Networking25-01-2026
Email Header Analyzer – Trace Email Origin & Verify Authenticity
Short guide on analyzing email headers to trace the sender’s origin, examine mail routing paths, and verify email authenticity to detect spoofing and phishing.
Cisco25-01-2026
Cisco Virtual Extensible LAN (VXLAN): Overview, Applications, and Configuration Guide
Comprehensive guide to Cisco VXLAN technology, covering its overview, working principles, benefits, Cisco-specific configurations, real-world applications, and troubleshooting tips for network engineers.
Cisco25-01-2026
Cisco Catalyst Switch QoS Configuration and Implementation
Learn how to configure and implement QoS on Cisco Catalyst switches to prioritize traffic, optimize network performance, and ensure smooth operation of critical applications.
Cisco25-01-2026
Complete Guide to Cisco Switch and Router Password Recovery & System Recovery Procedures
Step-by-step guide for recovering passwords and performing system recovery on Cisco switches and routers. Covers ROMmon recovery, IOS restoration, and configuration backups to ensure minimal downtime.
Cisco25-01-2026
Cisco Switch Hardening Best Practices
Comprehensive guide to Cisco switch hardening, including detailed best practices for securing IOS-based switches against common threats and vulnerabilities.
Cisco21-01-2026
How to Configure VRRP on Cisco (Virtual Router Redundancy Protocol)
Complete guide to VRRP configuration on Cisco devices with examples, verification commands, and troubleshooting.
Cisco21-01-2026
Gateway Redundancy Protocols – HSRP, VRRP, and GLBP
Complete guide to HSRP, VRRP, and GLBP with configuration examples, failover behavior, and troubleshooting.
Cisco21-01-2026
What is NAT? Network Address Translation Explained
Complete guide to Network Address Translation covering Static NAT, Dynamic NAT, PAT, and configuration examples.
Windows16-01-2026
Windows Networking Commands Troubleshooting and Administration
Complete guide to essential Windows networking commands for troubleshooting and administration.
Check Point04-01-2026
Check Point Troubleshooting and Debugging Commands
Complete guide to troubleshoot and debug Check Point firewalls.
Cisco04-01-2026
Upgrade Cisco Catalyst 9300 in Bundled Mode
Complete guide for upgrading Cisco Catalyst 9300 switches in bundled mode.
Cisco04-01-2026
Upgrade Cisco Catalyst 9300 in Install Mode
Step-by-step guide to upgrading Cisco Catalyst 9300 switches using install mode.
Cisco27-12-2025
Cisco Nexus vPC Technology: A Comprehensive Guide
A complete overview of Cisco Nexus vPC, including concepts, benefits, configuration basics, and common use cases.
Cisco27-12-2025
How to Upgrade Cisco Firepower Management Center (FMC)
Step-by-step guidance on upgrading Cisco FMC safely, including prerequisites, backup tips, and post-upgrade verification.
Cisco27-12-2025
Understanding Error-Disabled Mode on Cisco Switches and How to Troubleshoot It
Learn what error-disabled mode is, common causes, how to identify affected ports on Cisco switches.
Cisco27-12-2025
How to Test and Troubleshoot LAN Cables on Cisco Switches Using TDR
Step-by-step guide to testing Ethernet LAN cables using Cisco’s built-in TDR tool, interpreting test results, detecting shorts or open circuits, and troubleshooting faulty cables.
Cisco21-12-2025
How to Upgrade Cisco Catalyst 4500 Switches
Step-by-step guide to upgrading Cisco Catalyst 4500 switches, including preparation, bootflash image transfer, verification, rollback, and post-upgrade best practices.
Cisco21-12-2025
How to Upgrade Cisco Catalyst 9200 Switch in Install Mode
Step-by-step guide to upgrading Cisco Catalyst 9200 switches using install mode with verification, rollback, and best practices.
Cisco21-12-2025
How to Convert Cisco 9200 Switch From Bundle Mode to Install Mode
Step-by-step guide to converting Cisco Catalyst 9200 switches from bundle mode to install mode following Cisco best practices.
Cisco10-08-2025
How to Upgrade Cisco Catalyst 3850 in Install Mode
Complete guide to upgrading Cisco Catalyst 3850 switches using install mode with zero downtime.
Cisco23-05-2025
How to Recover Cisco Devices Stuck in ROMMON Mode Using a TFTP Server
A step-by-step guide to restoring Cisco devices stuck in ROMMON mode using a TFTP server.
Cisco16-05-2025
How to Upgrade or Downgrade NX-OS on Cisco Nexus Switch
Safe upgrade and downgrade procedures for NX-OS on Cisco Nexus switches including ISSU and rollback.
Cisco16-05-2025
How to Configure vPC on Cisco Nexus Switches
Full vPC configuration guide with best practices for Cisco Nexus 5000, 7000, and 9000 series.
Network Automation12-05-2025
Python Script to Execute Custom Commands on Multiple Cisco Devices
Run show commands or configuration changes across hundreds of Cisco devices using Python and Netmiko.
Windows27-11-2025
How to Fix "Virtualized VT-x/EPT Is Not Supported on This Platform" Error on Windows 11
Learn how to resolve the 'Virtualized VT-x/EPT is not supported on this platform' error when running nested virtualization on Windows 11. Step-by-step solutions for VMware, Hyper-V, and VirtualBox..
Windows26-11-2025
How to Change Default User Profile Location to Another Drive
Move the Users folder to D:\ or another drive during or after Windows installation.
Windows25-11-2025
Types Of Virtual Networks In VMware Virtualization
Bridged, NAT, Host-Only, and custom virtual networks explained with use cases.
Windows28-11-2025
How to Fix VMware Performance Issues on Windows 11
Optimize VMware Workstation/Player for best performance on Windows 11.
Cisco27-11-2025
Step-by-Step OSPF Configuration on Cisco Routers
From basic single-area to multi-area OSPF configuration with verification commands.
Cisco26-11-2025
HSRP Version 2 Configuration on Cisco Switch for Multiple VLANs
Complete HSRP v2 setup with tracking and preemption for multiple VLANs.
Cisco25-11-2025
HSRPv1 Configuration on Cisco Switches for Multiple VLANs
Legacy HSRPv1 configuration with interface tracking across multiple VLANs.
Check Point28-11-2025
Check Point 100 Essential Questions and Answers
Must-know interview and certification questions for Check Point firewalls.
Windows27-11-2025
Slow Hyper-V Guest Network Performance on Dell PowerEdge Server
Troubleshooting and fixing slow network speeds in Hyper-V VMs on Dell servers.
Cisco26-11-2025
How to Set Up Cisco Router and Switch for Seamless Internet Connectivity
Full configuration from scratch to get internet working through Cisco devices.
Cisco25-11-2025
How to Access Cisco Devices through Console
Console cable setup, PuTTY configuration, and speed settings explained.
Basic Networking28-11-2025
How to Use iPerf for Bandwidth Testing on Windows
Complete iPerf3 guide for measuring TCP/UDP throughput on Windows.
Cisco27-11-2025
How to Backup and Restore Configuration on Cisco Devices Using TFTP
Automated backup and restore procedures using TFTP, FTP, and SCP.
Fortinet26-11-2025
How to Configure FortiGate for High Availability
Active-Passive and Active-Active HA setup on FortiGate firewalls.
Check Point25-11-2025
Understanding the Packet Flow of a Check Point Firewall
Detailed packet journey through Check Point INSPECT engine and chain modules.
Cisco28-11-2025
How to Set Up Telnet on Cisco IOS Devices
Enable Telnet access with VTY lines and password/authentication configuration.
Cisco27-11-2025
How to Set Up SSH on Cisco IOS Devices
Secure remote access with SSHv2, RSA keys, and local/domain authentication.
Network Automation26-11-2025
Automating Cisco Switch Serial Number Extraction with Python
Python + Paramiko script to collect serial numbers from hundreds of switches.
Network Automation26-11-2025
Automate Network Switch Configuration with Python and Paramiko
Python Paramiko script to run commands on multiple devices and save output in .txt format.
Network Automation25-11-2025
Automating Cisco Switch Health Checks with Python
Daily automated CPU, memory, and interface error checks with email reports.
Windows27-11-2025
Windows Commands to Check System Information and Health
Essential CMD and PowerShell commands for hardware, disk, and performance.
Windows26-11-2025
Windows Activation in Proxy Environment
Activate Windows behind corporate proxy using KMS and command-line tricks.
Windows25-11-2025
Edit the Hosts File on Windows
Step-by-step guide to modify hosts file and bypass UAC restrictions.
Basic Networking28-11-2025
Generating Test Emails Using EHLO
Send test emails directly from telnet/smtp using EHLO commands.
Windows27-11-2025
How to Set Proxy Server in Windows
Configure system-wide proxy via GUI, netsh, and registry methods.
Cisco26-11-2025
Cisco Switch Stacking
Complete guide to stack Catalyst 2960X, 3850, and 9300 switches.
Check Point25-11-2025
Troubleshooting Using tcpdump
Capture packets on Check Point Gaia with filters and expert mode tips.
Cisco28-11-2025
How to Configure Syslog on Cisco Devices
Send logs to remote syslog server with severity levels and timestamps.
Cisco27-11-2025
SNMPv3 Configuration on Cisco Devices
Secure SNMPv3 with authentication and privacy (authPriv) configuration.
Cisco26-11-2025
Inter-VLAN Routing on Cisco Devices
Router-on-a-stick and SVI (Layer 3 switch) methods explained.
Check Point25-11-2025
Exporting Check Point Rulebase Policy
Export policy to CSV/HTML using Web Visualization and CLI tools.
Windows28-11-2025
How to Fix CredSSP “Encryption Oracle Remediation”
Fix RDP error by updating group policy on client and server.
Cisco27-11-2025
How to Use Cisco Discovery Protocol (CDP)
Enable, verify, and troubleshoot CDP for neighbor discovery.
Check Point26-11-2025
Check Point Firewall Architecture
Deep dive into INSPECT engine, chain modules, and 3-tier architecture.
Cisco25-11-2025
How to Configure Port-Security on Cisco Switch
Protect switch ports with MAC limiting, sticky learning, and violation actions.
Cisco28-11-2025
Cisco Router Configuration for Internet Access
NAT, DHCP, and default route setup for full internet connectivity.
Cisco27-11-2025
Understanding Ethernet Cable Categories
Cat5e, Cat6, Cat6a, Cat7, Cat8 – speeds, distances, and use cases.
HPE26-11-2025
How to enable traceroute in HPE Router/Switch
Enable ICMP responses and traceroute on HPE Comware devices.
Fortinet25-11-2025
How to Configure Custom NTP Servers on FortiGate
Set custom NTP servers and enable authentication on FortiGate.
Check Point28-11-2025
Extend the Disk Partition in Check Point Firewall Using lvm_manager
Safe disk extension on Gaia without reboot using lvm_manager.
Basic Networking27-11-2025
Capture Ping Responses with Time-Stamps
Log ping output with date/time on Windows and Linux.
Check Point26-11-2025
Enable Command History in Check Point
Enable full bash history in expert mode and save across reboots.
Check Point25-11-2025
Check Point Policy Backup Using migrate export / import
Full policy and objects export/import for migration and backup.
Cisco28-11-2025
Upgrading IOS on Your Cisco Stacked Switch
Step-by-step stack upgrade with minimal downtime.
Cisco26-11-2025
Cisco IP SLA for Proactive Network Monitoring
Monitor reachability and trigger failover with IP SLA + tracking.
Cisco25-11-2025
Stop Static IP Struggles — Set Up DHCP
Configure DHCP server and pools on Cisco routers/switches.
Cisco28-11-2025
How to Reset a Cisco Switch to Factory Defaults
Erase startup-config and VLAN database safely.
Cisco27-11-2025
Cisco Switch IOS Recovery Using Xmodem
Recover corrupted or missing IOS image via console.
Check Point26-11-2025
Migrating Check Point Management Server from R80.20 to R81.10
Full in-place and clean upgrade procedures.
Basic Networking25-11-2025
Hash Value Verification in Windows
Verify MD5, SHA1, SHA256 using built-in certutil.
Cisco28-11-2025
Cisco L2 Switch IOS Upgrade
Learn how to safely upgrade Cisco 2960 L2 switch IOS/firmware, including prerequisites, commands, TFTP transfer, MD5 verification, and setting the new boot image.
Fortinet27-11-2025
How to Upgrade FortiGate Firewall Firmware
Best practices and rollback procedures for FortiOS upgrades.
Check Point26-11-2025
Unable to Connect to Check Point Management Server — Troubleshooting
Fix SmartConsole connectivity and CPD issues.
Cisco25-11-2025
EtherChannel Configuration on Cisco Devices
LACP, PAgP, and static EtherChannel with load-balancing options.
Network Automation28-11-2025
Automate Network Switch Configuration with Python & Paramiko
Push config changes to multiple switches using pure Paramiko.
Basic Networking27-11-2025
Ethernet Cable Color Coding and Crimping
T568A vs T568B standards with diagrams.
Windows26-11-2025
How to Save PuTTY Output Automatically
Auto-log session output with timestamps and filenames.
Network Automation25-11-2025
Automating Network Device Configuration with Python Scripts
Real-world examples using Netmiko, NAPALM, and TextFSM.
Network Automation28-11-2025
Network Automation Fundamentals with Python
Beginner-friendly guide to Python for network engineers.
Network Automation27-11-2025
Python Installation Guide for Windows
Install Python, pip, and IDEs for network automation.
Network Security Tools
Free online tools to help you with subnetting, ACLs, hashing, and more.
VLSM Calculator
Calculate Variable Length Subnet Masks for efficient IP address allocation.
Open Tool
Windows Drive Partition Calculator
Calculate exact partition sizes for Windows drives with precision.
Open Tool
Cisco Type 7 Password Decrypter
Free online tool to decrypt Cisco Type 7 passwords. Recover plain-text credentials from Cisco IOS configurations instantly and securely.
Open Tool
IP Address Lookup
Find information about an IP address including location and ISP details.
Open Tool
MD5 and SHA Hash Calculator
Calculate and verify MD5, SHA hashes for file integrity checking.
Open Tool
Password Strength Checker
Analyze password strength and get security improvement suggestions.
Open Tool
Python Script Generator for Cisco
Generate Python scripts for Cisco device configuration automation.
Open Tool
Checkpoint Policy Backup and Restore
Backup and restore Checkpoint firewall policies efficiently.
Open Tool
Cisco FMC and FTD Upgrade Command
Generate upgrade commands for Cisco FMC and FTD devices.
Open Tool
Salary Hike Calculator
Calculate the impact of a salary hike on your income and percentage increase.
Open Tool