Modernes Linux verwendet iproute2 und ss anstelle der veralteten ifconfig und netstat.
ip¶
ip addr show ip -br addr ip route show ip addr add 192.168.1.100/24 dev eth0 ip route add default via 192.168.1.1
ss¶
ss -tlnp ss -ulnp ss -tnp sport = :80
iptables¶
iptables -L -n -v iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -m state –state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -p tcp –dport 22 -j ACCEPT iptables -A INPUT -p tcp -m multiport –dports 80,443 -j ACCEPT iptables -P INPUT DROP iptables-save > /etc/iptables/rules.v4
Diagnose¶
ping -c 4 8.8.8.8 mtr google.com dig google.com
Netzwerktools = Grundlage¶
ip, ss und iptables sind unverzichtbar.
networkingiptableslinux