OpenVPN: IPv4 /32 single client

From OnnoWiki
Jump to navigation Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

sumber: https://www.ostechnix.com/easiest-way-install-configure-openvpn-server-linux/


Topology

CLIENT 1 ------- HOST A ---------------- HOST B
                 ovpn server             ovpn client

Host A akan berfungsi sebagai OpenVPN Server. 

OS : Ubuntu 18.04
IP : 192.168.0.239/24
hostname : vpnserver


Host B akan berfungsi sebagai OpenVPN client 

OS : Ubuntu 18.04
IP : 192.168.0.237/24

Instal & Konfigurasi OpenVPN Server

Download script openvpn-install dari github 

sudo su
apt install openssh-server openvpn

cd /usr/local/src
wget https://git.io/vpn -O openvpn-install.sh
bash openvpn-install.sh

Jawab pertanyaan: 

IP address: 192.168.0.239
Public IP address / hostname: vpnserver
Protocol [1-2]: 1 -- UDP
Port: 1194
DNS [1-5]: 1
Client name: client
Press any key to continue...  <ENTER>

Maka akan tampak file client.ovpn, di 

/root/client.ovpn

Install openssh-server di client, copykan client.ovpn ke client 

scp client.ovpn root@192.168.0.237:


Reboot 

shutdown -r now

Cek kondisi jaringan 

ifconfig

Akan muncul interface tun0 

tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
        inet 10.8.0.1  netmask 255.255.255.0  destination 10.8.0.1
        inet6 fe80::eaaa:77ed:ba02:748  prefixlen 64  scopeid 0x20<link>
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 100  (UNSPEC)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6  bytes 288 (288.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Konfigurasi OpenVPN Client

Pastikan openvpn terinstalsi 

sudo su
apt install openssh-server openvpn

Edit /etc/hosts isi dengan nama OpenVPN server 

192.168.0.239 vpnserver


Jalankan OpenVPN client 

cd ~
sudo su
openvpn --config client.ovpn

Akan keluar kira-kira 

..
..
Sat Feb 16 08:24:45 2019 TUN/TAP device tun0 opened
Sat Feb 16 08:24:45 2019 TUN/TAP TX queue length set to 100
Sat Feb 16 08:24:45 2019 do_ifconfig, tt->did_ifconfig_ipv6_setup=0
Sat Feb 16 08:24:45 2019 /sbin/ip link set dev tun0 up mtu 1500
Sat Feb 16 08:24:45 2019 /sbin/ip addr add dev tun0 10.8.0.2/24 broadcast 10.8.0.255
Sat Feb 16 08:24:45 2019 /sbin/ip route add 192.168.0.239/32 dev enp0s3
Sat Feb 16 08:24:45 2019 /sbin/ip route add 0.0.0.0/1 via 10.8.0.1
Sat Feb 16 08:24:45 2019 /sbin/ip route add 128.0.0.0/1 via 10.8.0.1
Sat Feb 16 08:24:45 2019 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Sat Feb 16 08:24:45 2019 Initialization Sequence Completed

Cek interface, akan muncul tun0 

ifconfig

tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
        inet 10.8.0.2  netmask 255.255.255.0  destination 10.8.0.2
        inet6 fe80::28c4:3e38:2497:e12a  prefixlen 64  scopeid 0x20<link>
        unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  txqueuelen 100  (UNSPEC)
        RX packets 51  bytes 11522 (11.5 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 134  bytes 43524 (43.5 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Cek sambungan 

ping -c3 10.8.0.1

Sample output: 

PING 10.8.0.1 (10.8.0.1) 56(84) bytes of data.
64 bytes from 10.8.0.1: icmp_seq=1 ttl=64 time=0.539 ms
64 bytes from 10.8.0.1: icmp_seq=2 ttl=64 time=1.17 ms
64 bytes from 10.8.0.1: icmp_seq=3 ttl=64 time=0.921 ms

--- 10.8.0.1 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2007ms
rtt min/avg/max/mdev = 0.539/0.878/1.176/0.264 ms

Cek routing 

route -n

Sample output 

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.8.0.1        128.0.0.0       UG    0      0        0 tun0


Anda sudah tersambung ke VPN dengan IP 10.8.0.0/24

Referensi

Pranala Menarik

Retrieved from "https://onnocenter.or.id/wiki/index.php?title=OpenVPN:_IPv4_/32_single_client&oldid=60657"