NAT pada Ubuntu Server 13.10

Monday, February 3, 2014 | comments


Konfigurasi NAT pada Ubuntu Server 13.10



# Hardware:
Modem / Jaringan Internet
CD ubuntu-13.10-server-i386
PC Server dengan 2 NIC (Network Interface Card) dan PC Client
Switch (Optional)

# Installasi:
Default installation, tanpa terkoneksi ke jaringan

# Konfigurasi IP Server:
nano /etc/network/interface
auto eth0
iface eth0 inet static
     address 192.168.x.xxx
     netmask 255.255.255.0
     network 192.168.x.0
     broadcast 192.168.x.255
     gateway 192.168.x.xxx
dns-nameservers 8.8.8.8
auto eth1
iface eth1 inet static
     address 192.168.10.1
     netmask 255.255.255.0
     network 192.168.10.0
     broadcast 192.168.10.255

Catatan:               eth0 sambung ke modem, eth1 sambung ke client
                                ip eth0 adalah ip client modem (sambung ke internet)
                                ip eth1 bebas berfungsi sebagai gateway
                                gateway berasal dari modem
                                dns berasal dari modem / menggunakan dns public google 8.8.8.8

# Konfigurasi Packet Forward IPv4
nano /etc/sysctl.conf
ubah #net.ipv4.ip_forward=1 menjadi net.ipv4.ip_forward=1

# Konfigurasi NAT (Network Address Translation)
nano /etc/rc.local
iptables –t nat –A POSTROUTING –o eth0 –j MASQUERADE
exit 0

# Reboot

# Konfigurasi IP Client
address 192.168.10.xxx
netmask 255.255.255.0
gateway 192.168.10.1
dns 8.8.8.8

Catatan:               xxx merupakan ip selain gateway yaitu 2 sampai 254

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