Network Tools

Task

New Legacy

Set IP address ip addr add 192.168.1.100/24 dev eth0 ifconfig eth0 192.168.1.100

Set netmask ip addr add 192.168.1.100/24 dev eth0 ifconfig eth0 netmask 255.255.255.0

Set MAC ip link set dev interface address

00:07:e9:0c:ec:5e ifconfig eth0 hw ether

00:07:e9:0c:ec:5e

Request DHCP address dhclient eth0 Set default gateway ip route add default via 192.168.1.1 route add default gw 192.168.1.1

Show default gateway ip route route

Show network device settings ip link ethtool eth0

Show IP address ip addr show ifconfig

Show Netmask ip addr show ifconfig

Check routing traceroute 4.2.2.2

IP/Netmask/MAC

ARP, Connectivity and Ports

Check connectivity ping 192.168.1.100

Check connectivity (broadcast) ping -b 192.168.1.255

Show ARP table arp

Set static ARP entry arp -s 192.168.1.100 00:07:e9:0c:ec:5e

Deleting an ARP entry arp -d 192.168.1.100

Show network connections ss -ltn

Scan network ports nmap -sT -sU -P0 -O 192.168.1.100

netstat -platune

DNS

Resolve DNS name (address

record) nslookup google.com dig google.com A

Resolve DNS using server nslookup google.com 4.2.2.2 dig @4.2.2.2 google.com