Network Tools | The Free Tools Directory

DNS Lookup

Query DNS records with email security analysis and health scoring

2 options🛡️ Security

Wireless Security Architecture Planner

Plan wireless network deployments with proper security protocols, antenna selection, 802.11 standards comparison, and security configuration checklists. CISSP Domain 4 aligned.

1 option🌐 Network

Firewall Rule Logic Simulator

Build firewall rulesets, test packets against rules, compare stateful vs stateless filtering, and analyze rule ordering. CISSP Domain 4 study tool.

1 option🌐 Network

Subnet Calculator

Calculate subnet masks, network ranges, and IP addressing

1 option🌐 Network

BGP AS Lookup

Look up BGP Autonomous System information by ASN or find which AS an IP address belongs to

1 option🌐 Network

MAC Address Lookup

Advanced MAC address analyzer with instant OUI lookup, batch processing, vendor search, duplicate detection, binary visualization, EUI-64 conversion, and lookup history

1 option🌐 Network

IPv4/IPv6 Converter

Convert between IPv4 and IPv6 address formats. Supports IPv4-mapped, 6to4, and format conversion between compressed and full forms.

1 option🌐 Network

Network Latency Calculator

Calculate network latency, ping distance, and data transfer times between locations

1 option🌐 Network

TCP Window Size Calculator

Calculate optimal TCP window sizes, BDP, and buffer configurations for WAN optimization. Generate OS-specific tuning commands for Linux, Windows, and macOS to maximize network throughput.

1 option🌐 Network