IPv6: Router Ubuntu

Berikut adalah langkah yang perlu dilakukan untuk membuat sebuah router IPv6 sederhana menggunakan Ubuntu.

Akses ke IPv6 Internet

Perhitungan Subnet IPv6

IPv6 Address : Perhitungan subnetting IPv6

NAT IPv6

Jika dibutuhkan, maka netfilter6 dapat digunakan sebagai NAT IPv6.

IPv6 Masquerading

Seperti layaknya client IPv4, maka client dapat di sembunyikan di belakang router dengan IPv6 masquerading (hide/overlap NAT), seperti

ip6tables -t nat -A POSTROUTING -o tun0 -s fec0::/64 -j MASQUERADE
ip6tables -t nat -A POSTROUTING -o teredo -s 2001:0:53aa:64c:20a7:659c:4b0c:e8d7 -j MASQUERADE

IPv6 Destination NAT

Sebuah dedicated IPv6 address global dapat di forward ke internal IPv6 address, seperti,

ip6tables -t nat -A PREROUTING -d 2001:db8:0:1:5054:ff:fe01:2345 -i tun0 -j DNAT --to-destination fec0::5054:ff:fe01:2345

IPv6 Port Forwarding

Sebuah port yang spesifik dapat di forward ke jaringan internal, seperti,

ip6tables -t nat -A PREROUTING -i tun0 -p tcp --dport 8080 -j DNAT --to-destination [fec0::1234]:80

Siapkan OS Ubuntu

Skenario 1: Alokasi Stateless untuk LAN lokal

GATEWAY / Router ke Internet

Install radvd

echo 1 > /proc/sys/net/ipv6/conf/all/forwarding 
ip addr add fec0:1234::dead/64 dev enp0s3
sudo apt install radvd

Edit /etc/radvd.conf

interface enp0s3 {
        AdvSendAdvert on;
        prefix fec0:1234::/64 {
        };
};

Restart

/etc/init.d/radvd restart

NAT ke IPv6 Global

ip6tables -t nat -A POSTROUTING -i enp3s0 -o teredo -s fec0:1234::/64 -j MASQUERADE

Skenario 2: Routing Statik untuk LAN Lokal

GATEWAY

Kondisi Gateway

echo 1 > /proc/sys/net/ipv6/conf/all/forwarding

Interface tun0 IPv4 10.8.0.21/24 dan IPv6 2a07:1c44:212:c0ca:87e8::/80

echo 1 > /proc/sys/net/ipv6/conf/tun0/forwarding
ip route add ::/0 dev tun0

Interface enp3s0

echo 1 > /proc/sys/net/ipv6/conf/enp3s0/forwarding
ip addr add 2a07:1c44:212:c0ca:87e8:1000::1/84 dev enp3s0
ip -6 route add 2a07:1c44:212:c0ca:87e8:2000::/84 via 2a07:1c44:212:c0ca:87e8:1000::100

CLIENT di VirtualBox

Set IPv6 Static (enp0s3)

echo 0 > /proc/sys/net/ipv6/conf/all/forwarding
ip addr add 2a07:1c44:212:c0ca:87e8:1000::100/84 dev enp0s3
ip addr add 2a07:1c44:212:c0ca:87e8:2000::100/84 dev enp0s3
ip -6 route add 2a07:1c44:212:c0ca:87e8::/84 enp0s3
ip -6 route add 2a07:1c44:212:c0ca:87e8::/84 via 2a07:1c44:212:c0ca:87e8::2/84
ip -6 route add ::/0 via 2a07:1c44:212:c0ca:87e8::2/84

atau eth0

echo 0 > /proc/sys/net/ipv6/conf/all/forwarding
ip addr add 2a07:1c44:212:c0ca:87e8:1000::100/84 dev eth0
ip addr add 2a07:1c44:212:c0ca:87e8:2000::100/84 dev eth0
ip -6 route add 2a07:1c44:212:c0ca:87e8::/84 eth0
ip -6 route add 2a07:1c44:212:c0ca:87e8::/84 via 2a07:1c44:212:c0ca:87e8::2/84
ip -6 route add ::/0 via 2a07:1c44:212:c0ca:87e8::2/84

Skenario 3: Alokasi subnet untuk salah satu PC / Router di LAN

Aktifkan IPv6 Address Forwarding
Set IPv6 Static

Pranala Menarik

IPv6