Archive for the ‘Security’ Category

using ssh tunnel as socks proxy

18 November 2010 5 comments


If you have a laptop then you surely have been in a situation where you need to have a secure connection while on the move. This is most important when you are at a random hotspot and need to log into a non-secure site (authentication over http) or do not trust the vendor providing the connection. If you have access to a server running SSH then you can use a great feature in openssh to set up a SOCKS proxy and route all your traffic through. This is very similar to VPN’ing but you can do it on the fly and dont have to have an special client software on your machine.

This is written specifically for Unix based systems with some stuff even more specific for Gnome. If you are using Mac OSX, Linux or Unix variants you can set up the proxy with the commands but telling your system to use the tunnel may vary. Under windows there is a way to perform all these same things with putty, my apologies for not covering that here. If you are a windows user and cant find any good documentation please let me know I would be happy to write it up. Read more…

Konfigurasi Firewall sederhana menggunakan Shorewall

3 May 2010 10 comments

Shorewall adalah salah satu tools firewall pada linux yang berbasiskan iptables. Shorewall terdapat konsep “zone” yang memudahkan kita untuk menentukan policy firewall, daripada kita melakukan konfigurasi secara manual dengan iptables. Misalnya network anda adalah spt gambar dibawah ini : Read more…

GPG error saat apt-get update

8 April 2009 2 comments

Pernakah anda mendapatkan warning seperti ini :
root@cygnus:~# apt-get update

Get:1 lenny Release.gpg [386B]
Ign lenny/main Translation-en_US
Ign lenny/contrib Translation-en_US
Ign lenny/non-free Translation-en_US
. Read more…

Blocking situs porno menggunakan squidGuard

16 January 2009 13 comments

Teknik ini sudah ada sejak lama, dan saya juga sudah berhasil mengimplementasikannya sejak lama, tetapi baru sekarang sempat saya tulis, yaaaa itung2 agar bisa menjadi amal jariyah saya karena menghalangi orang berbuat dosa :). Skenario yang saya terapkan adalah dengan membelokkan (redirect) akses ke situs/website yg kita blokir (yaitu seputar pornografi) menuju kepada situs/website yg tdk kita blokir (non-pornografi) tanpa sepengetahuan user.
Menurut, SquidGuard adalah URL redirector used to use blacklists with the proxysoftware Squid. There are two big advantages to squidguard: it is fast and it is free. SquidGuard is published under GNU Public License.
Read more…