Vernetzung mittels TCP/IP Linux Beispiel

Beispiel Netz

• Jeder Rechner soll jeden erreichen.
• Der Router r1 soll maskieren.
• Der server s1 soll als Nameserver fungieren.

[Bearbeiten]

Manuelle Konfiguration

r1

• ip addr add 212.88.34.67/24 dev eth0
• ip addr add 172.18.43.1/24 dev eth1
• ip route add default via 212.88.34.1
• ip route add 192.168.77.0/24 via 172.18.43.2
• ip route add 172.19.44.32/27 via 172.18.43.3
• sysctl -w net.ipv4.ip_forward=1
• echo "nameserver 172.19.44.41/27" > /etc/resolv.conf
• echo "search kit.lab" >> /etc/resolv.conf
• iptables -t nat -I POSTROUTING -o eth0 -j MASQUERADE

r2

• ip addr add 172.18.43.2/24 dev eth0
• ip addr add 192.168.77.1/24 dev eth1
• ip route add default via 172.18.43.1
• sysctl -w net.ipv4.ip_forward=1
• echo "nameserver 172.19.44.41/27" > /etc/resolv.conf
• echo "search kit.lab" >> /etc/resolv.conf

r3

• ip addr add 172.18.43.3/24 dev eth0
• ip addr add 172.19.44.33/27 dev eth1
• ip route add default via 172.18.43.1
• ip route add 192.168.22.0/24 via 172.19.44.34
• sysctl -w net.ipv4.ip_forward=1
• echo "nameserver 172.19.44.41/27" > /etc/resolv.conf
• echo "search kit.lab" >> /etc/resolv.conf

r4

• ip addr add 172.19.44.34/27 dev eth0
• ip addr add 192.168.22.1/24 dev eth1
• ip route add default via 172.19.44.33
• sysctl -w net.ipv4.ip_forward=1
• echo "nameserver 172.19.44.41/27" > /etc/resolv.conf
• echo "search kit.lab" >> /etc/resolv.conf

s1

• ip addr add 172.19.44.41/27 dev eth0
• ip route add default via 172.19.44.33
• echo "nameserver 172.19.44.41/27" > /etc/resolv.conf
• echo "search kit.lab" >> /etc/resolv.conf