Listen to this Post
Networking is a fundamental skill for cybersecurity experts, penetration testers, and IT administrators. Mastering command-line networking tools helps in troubleshooting, reconnaissance, and securing systems. Below are critical networking commands with practical examples.
You Should Know:
1. `ping` – Check Network Connectivity
Verifies if a host is reachable and measures response time.
ping example.com ping -c 4 192.168.1.1 Send 4 packets
2. `ifconfig` / `ip` – Network Interface Configuration
Displays or configures network interfaces (Linux).
ifconfig ip addr show ip link set eth0 up
3. `netstat` – Network Statistics
Shows active connections, listening ports, and routing tables.
netstat -tuln List all listening ports netstat -r Display routing table
4. `nslookup` / `dig` – DNS Query Tools
Resolves domain names to IP addresses.
nslookup google.com dig example.com MX
5. `traceroute` / `tracert` – Path Tracing
Maps the route packets take to reach a destination.
traceroute google.com Linux tracert google.com Windows
6. `arp` – Address Resolution Protocol
Displays or modifies the ARP cache.
arp -a arp -d 192.168.1.1 Delete ARP entry
7. `route` – Routing Table Management
View or modify the system’s routing table.
route -n route add default gw 192.168.1.1
8. `ssh` – Secure Remote Login
Connects to a remote server securely.
ssh [email protected] ssh -i key.pem [email protected]
9. `nc` (Netcat) – Network Swiss Army Knife
Used for port scanning, file transfers, and more.
nc -zv example.com 80 Port scan nc -lvp 4444 Listen on port 4444
10. `tcpdump` – Packet Sniffing
Captures and analyzes network traffic.
tcpdump -i eth0 tcpdump port 80 -w capture.pcap
11. `iptables` – Firewall Rules
Configures Linux firewall rules.
iptables -L iptables -A INPUT -p tcp --dport 22 -j ACCEPT
12. `curl` / `wget` – Web Requests
Downloads files or interacts with web services.
curl -O https://example.com/file.zip wget http://example.com/file.iso
13. `whois` – Domain Information Lookup
Retrieves domain registration details.
whois example.com
14. `nmcli` – NetworkManager CLI
Manages network connections (Linux).
nmcli device status nmcli connection up eth0
15. `host` – DNS Lookup Utility
Resolves hostnames and IPs.
host google.com host 8.8.8.8
What Undercode Say:
Networking commands are essential for diagnosing issues, securing systems, and performing penetration tests. Memorizing these commands helps in real-world scenarios like:
– Troubleshooting connectivity (ping, traceroute)
– Analyzing open ports (netstat, nc)
– Inspecting network traffic (tcpdump)
– Managing firewall rules (iptables)
For cybersecurity professionals, mastering these commands is non-negotiable. Practice them in labs, virtual machines, or CTF challenges to build expertise.
Expected Output:
ping -c 4 google.com traceroute example.com netstat -tuln
(Note: No URLs were extracted from the original post.)
References:
Reported By: Dharamveer Prasad – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
