Network troubleshooting
Here are some useful tools and links that can be helpful for troubleshooting network-related issues, monitoring network performance, and analyzing network traffic.
| Tool/Resource |
Description |
| Ping |
Ping is a command-line tool that sends ICMP Echo Request packets to test network connectivity. |
| Traceroute |
Traceroute is used to trace the route packets take through the internet to a destination host. |
| Wireshark |
Wireshark is a powerful network protocol analyzer that can capture and inspect network traffic. |
| Netstat |
Netstat is a command-line tool that displays network connections, routing tables, and interface statistics. |
| Nslookup |
Nslookup is a command-line tool for querying DNS (Domain Name System) to resolve domain names to IP addresses. |
| Nmap |
Nmap is a versatile network scanning tool that can discover hosts and services on a network. |
| TCPDump |
TCPDump is a command-line packet analyzer that captures and displays network traffic in real-time. |
| ipconfig (Windows) / ifconfig (Linux) |
Display and configure network interfaces on Windows (ipconfig) and Linux (ifconfig). |
| Netcat |
Netcat, also known as the "Swiss Army Knife" of networking, is a versatile networking utility. |
| Fiddler |
Fiddler is a web debugging proxy that can capture and inspect HTTP/HTTPS traffic between a client and server. |
| GRC ShieldsUP! |
ShieldsUP! is an online tool for testing the security of your firewall by probing for open ports. |
| MTR (My TraceRoute) |
MTR combines the functionality of ping and traceroute to provide detailed network path analysis. |
| Speedtest.net |
Speedtest.net allows you to test your internet connection's speed and latency to various servers. |
| WhatIsMyIP.com |
WhatIsMyIP.com provides information about your public IP address and geolocation. |
DNS troubleshooting
Here are some useful tools and links for DNS (Domain Name System) troubleshooting:
| Tool/Resource |
Description |
| Nslookup |
Nslookup is a command-line tool for querying DNS to resolve domain names to IP addresses and vice versa. |
| Dig |
Dig is a command-line tool for querying DNS servers to retrieve DNS records and information. |
| Nslookup Online |
An online Nslookup tool that provides DNS lookup results for domain names and IP addresses. |
| MXToolBox |
MXToolBox provides a collection of DNS and network diagnostic tools, including DNS lookup and DNS health checks. |
| DNSQuery.org |
DNSQuery.org offers online DNS lookup and DNS resolution services for domain names and IP addresses. |
| DNS Checker |
DNS Checker allows you to check DNS records, DNS propagation, and DNS speed for a domain name. |
| WhatIsMyDNS |
WhatIsMyDNS provides information about the DNS servers that resolve a specific domain name. |
| IntoDNS |
IntoDNS checks the health and configuration of your DNS servers and provides a detailed report. |
| DnsViz |
DnsViz is a tool for visualizing the DNS resolution process and displaying DNSSEC-related information. |
| Google Public DNS |
Information about using Google Public DNS servers, which can help with DNS resolution issues. |
| Cloudflare DNS |
Cloudflare offers a fast and privacy-focused DNS resolver that can be used to troubleshoot DNS issues. |
| Quad9 DNS |
Quad9 provides a secure and privacy-aware DNS service that blocks malicious domains. |
| OpenDNS |
OpenDNS offers DNS resolution with security features and content filtering capabilities. |
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