Tutorial by Galih Prastowo Aji
Di terminal ketik:
apt-get update
apt-get upgrade
apt-get install -y dropbear
nano /etc/default/dropbear
Isi sebagai berikut:
# disabled because OpenSSH is installed
# change to NO_START=0 to enable Dropbear
NO_START=0
# the TCP port that Dropbear listens on
DROPBEAR_PORT=3128
# any additional arguments for Dropbear
DROPBEAR_EXTRA_ARGS=
# specify an optional banner file containing a message to be
# sent to clients before they connect, such as "/etc/issue.net"
DROPBEAR_BANNER=
# RSA hostkey file (default: /etc/dropbear/dropbear_rsa_host_key)
#DROPBEAR_RSAKEY="/etc/dropbear/dropbear_rsa_host_key"
# DSS hostkey file (default: /etc/dropbear/dropbear_dss_host_key)
#DROPBEAR_DSSKEY="/etc/dropbear/dropbear_dss_host_key"
# Receive window size - this is a tradeoff between memory and
# network performance
DROPBEAR_RECEIVE_WINDOW=65536
Lalu jalankan dropbear:
/etc/init.d/dropbear start
Di terminal ketik:
apt-get update
apt-get install -y stunnel4
Sekarang buat konfigurasi stunnel:
nano /etc/stunnel/stunnel.conf
Isi sebagai berikut:
cert = /etc/stunnel/stunnel.pem
client = no
socket = a:SO_REUSEADDR=1
socket = l:TCP_NODELAY=1
socket = r:TCP_NODELAY=1
[dropbear]
connect = 127.0.0.1:3128
accept = 443
Sekarang kita buat sertifikat SSL. PERHATIAN: Copy command dibawah ini satu - satu, jangan di copy & paste 3 commands sekaligus.
openssl genrsa -out key.pem 2048
openssl req -new -x509 -key key.pem -out cert.pem -days 1095
cat key.pem cert.pem >> /etc/stunnel/stunnel.pem
Sekarang kita buat stunnel jalan secara otomatis ketika VPS di reboot:
nano /etc/default/stunnel4
Isi sebagai berikut:
# /etc/default/stunnel
# Julien LEMOINE <speedblue@debian.org>
# September 2003
# Change to one to enable stunnel automatic startup
ENABLED=1
FILES="/etc/stunnel/*.conf"
OPTIONS=""
# Change to one to enable ppp restart scripts
PPP_RESTART=0
Sekarang start stunnel di VPS kita:
/etc/init.d/stunnel4 start
Untuk mengecek apakah stunnel & dropbear berjalan normal di VPS, kita bisa menggunakan command:
netstat -nlpt
Maka hasilnya akan seperti ini jika keduanya berjalan normal:
root@NewDeb:~# netstat -nlpt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 2554/stunnel4
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 2123/sshd
tcp 0 0 0.0.0.0:3128 0.0.0.0:* LISTEN 2708/dropbear
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2362/exim4
tcp6 0 0 :::22 :::* LISTEN 2123/sshd
tcp6 0 0 :::3128 :::* LISTEN 2708/dropbear
tcp6 0 0 ::1:25 :::* LISTEN 2362/exim4
Kita buat akun dulu di VPS kita
useradd test
passwd test
Di KPN Revolution isikan akun SSH sebagai berikut:
Host: IP VPS KITA
Username: test
Password: test
SSL/SSH Port: 443