Forwarding: Our PC act as a gateway

Forwarding memungkinkan paket-paket data dari NIC (network interface) satu (misalnya eth0) diforward ke network interface yang lain (misal eth1)
Langkah pertama:

[root@csmwin etc]# echo 1 > /proc/sys/net/ipv4/ip_forward

Atau masukkan di /etc/rc.local –> untuk membuat “permanent”

Cek:

[root@csmwin etc]# cat /proc/sys/net/ipv4/ip_forward
1

Metode lainnya:

[root@csmwin etc]# vi /etc/sysctl.conf
# Controls IP packet forwarding
net.ipv4.ip_forward = 0 —–> ganti 0 menjadi 1

Langkah kedua:

[root@csmwin etc]# vi /etc/sysconfig/network

Tambahkan baris berikut:

FORWARD_IPV4=true

Langkah berikutnya:

[root@csmwin csmwin]# /sbin/iptables –table nat –flush
[root@csmwin csmwin]# /sbin/iptables -A POSTROUTING -j MASQUERADE -t nat -s 192.168.0.0/24 -o eth0
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