Configurasi Simple Gateway Debian Lenny

DEBIAN 5.0.7 Lenny bisa di dapatkan di sini :

Unduh Debian

Bakar/burning .iso file tadi, kemudian install seperti biasa.


Konfigurasi simple :

Konfigurasi IP untuk masing-masing ethernet card, eth0 dan eth1

Edit file /etc/network/interfaces

#ke Localhost
auto lo
iface lo inet loopback

#ke WAN
auto eth0
iface eth0 inet static
address 192.168.1.2
netmask 255.255.255.0
gateway 192.168.1.1
dns-nameservers 8.8.8.8

#ke LAN
auto eth1
iface eth1 inet static
address 192.168.0.1
netmask 255.255.255.0

Untuk  resolv DNS bisa juga manual dengan cara menambahkan file /etc/resolv.conf yang isinya seperti ini :

nameserver 8.8.8.8

Update repositori edit file /etc/apt/sources.list (kasi tanda # semuanya) dan tambahkan repo kambing

deb http://kambing.ui.ac.id/debian lenny main contrib non-free

kemudian jalankan perintah dibawah ini

apt-get update

Aktifkan NAT
edit file /etc/sysctl.conf

net.ipv4.ip_forward = 1

kemudian jalankan perintah ini :

sysctl -p /etc/sysctl.conf

Setelah itu restart network yang ada dengan perintah sebagai berikut :

/etc/init.d/networking restart

Install SSH Server

apt-get install openssh-server

Install Monitoring Tool

apt-get install htop iftop iptraf

Install Proxy Server

apt-get install squid squidclient

Konfigurasi iptables untuk NAT
NAT, jalankan perintah ini:

iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Transparant Proxy

iptables -A PREROUTING -t nat -p tcp --dport 8080 -j REDIRECT --to-port 3128

Simpan rule firewall / iptables diatas :

iptables-save -c > /etc/iptables.conf

Agar setiap kali server di restart atau network di restart aturan iptables di atas di jalankan, edit file /etc/network/interfaces dan tambahkan baris berikut :

post-down iptables-save -c > /etc/iptables.conf
pre-up iptables-restore < /etc/iptables.conf

Jadi hasil akhir dari file /etc/network/interfaces seperti ini :

auto eth0
iface eth0 inet static
address 192.168.1.10
netmask 255.255.255.0
gateway 192.168.1.1
dns-nameservers 8.8.8.8
post-down iptables-save -c > /etc/iptables.conf
pre-up iptables-restore < /etc/iptables.conf

Konfigurasi Proxy Server menggunakan squid
ubah file /etc/squid/squid.conf menjadi /etc/squid/squid.conf-default

mv /etc/squid/squid.conf /etc/squid/squid.conf-default

buat file konfigurasi baru untuk squid proxy server

nano /etc/squid/squid.conf

dan paste kode konfigurasi contoh squid.conf dibawah ini :

http_port 3128 transparent
hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
no_cache deny QUERY
cache_mem 64 MB
maximum_object_size 128000 KB
minimum_object_size 0 KB
cache_dir diskd /var/spool/squid 50000 16 256
cache_store_log none
#cache_access_log /var/log/squid/access.log
cache_access_log none
half_closed_clients off
cache_swap_high 100%
cache_swap_low 80%
log_mime_hdrs off
forwarded_for off
auth_param basic children 5
auth_param basic realm Squid proxy-caching web server
auth_param basic credentialsttl 2 hours
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern . 0 20% 4320
half_closed_clients off
acl all src 0.0.0.0/0.0.0.0
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl SSL_ports port 443 563
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access deny to_localhost
acl mynetwork src 192.168.0.0/255.255.255.0
http_access allow mynetwork
http_access allow localnet
http_access allow localhost
http_reply_access allow all
icp_access allow all
visible_hostname Server@LENNY
ie_refresh on

Restart squid proxy server

/etc/init.d/squid restart

Selesai.