Monopole Design

The final GSM-900 monopole antenna design is as follows, a 77.5 mm long 3 mm diameter element coming out of the center of a 200 mm by 200 mm solid metal sheet.

Construction

Materials (Image)

1 @ 3 mm diameter Brass Rod 100 mm in length (thick copper wire would be a suitable alternative) 1 @ 200 mm by 200 mm Copper Sheet (a biscuit tin lid or piece of PCB board would be a suitable alternative) 1 @ N-Type Panel Receptacle Jack (Amphenol Connex Panel Receptacle Jack – Solder Pot Terminal or similar) 4 @ Small Nuts and Bolts (some small washers may also be needed)

Tools (Image)

Hacksaw Sheet metal shears or jigsaw Soldering iron and solder

Mempercepat Windows XP

Banyak cara yang bisa digunakan untuk mempercepat dan mengoptimize windows XP. Disini akan saya tulis bagaimana mempercepat Windows XP dengan men-disable beberapa service yang tidak penting.
Di bawah ini daftar service yang bisa di disable :
1. Alerter (berguna untuk mengirim pesan perhatian –alert– pada sistem jaringan; kalau untuk PC stand alone nggak perlu, bisa di - disable).

Cara bobol warnet / hotspot

Langsung aja sekarang ke caranya :

1. Cari lokasi penyedia layanan hotspot, tentunya di daerah yang terjangkau jaringan hotspot tersebut.

2. Hidupkan laptop anda, dan hidupkan pula wireless network anda dan lihat di sistem tray icon wireless network, kemudian klik kanan dan pilih view avalible wireless network, dan tentunya setelah itu anda harus connect ke wireless hotspot tujuan anda.

Cara Install Kloxo di VPS Centos 5, 32 & 64 bit

Bebrapa dari kita tentunya sudah tahu kloxo, ya... software admin semacam cPanel tapi gratis. Melihat betapa mahalnya lisensi cPanel yang untuk vps saja bisa sampai $15/month belum termasuk sewa vps nya, tentunya bisa membuat kantong kita kering, hehe...

Kalo untuk vps penggunaan pribadi solusinya ya bisa pakai kloxo produk dari perusahaan LxCenter ini, tapi kalo untuk usaha hosting ya sudah pasti cPanel pilihannya :)

Install ptunnel on Server CentOS 5.5 for Tunneling via ICMP

Ptunnel is an application that allows you to reliably tunnel TCP connections to a remote host using ICMP echo request and reply packets, commonly known as ping requests and replies. It is not a feature-rich tool by any means, but it does what it advertises. So here is what it can do:

* Tunnel TCP using ICMP echo request and reply packets
* Connections are reliable (lost packets are resent as necessary)
* Handles multiple connections
* Acceptable bandwidth (150 kb/s downstream and about 50 kb/s upstream are the currently measured maximas for one tunnel)
* Authentication, to prevent just anyone from using your proxy



PTunnel will not work in the condition that when an outgoing/incoming ping not allowed, or filtered by a gateway somewhere along the way. Also, it does not involve any congestion control. But a good thing is that it is open source and supports both Linux, Windows & Mac. For Windows, you will also need WinPcap.

There is the step for installing ptunnel 0.71:

ON SERVER

# yum -y install gcc*
# yum -y install libpcap*
# mkdir /tmp
# cd /tmp
# wget http://www.cs.uit.no/~daniels/PingTunnel/PingTunnel-0.71.tar.gz
# tar -zxvf PingTunnel-0.71.tar.gz
# cd PingTunnel
# make
# make install


On server CentOS 5.5 32bit

# ptunnel &




On server CentOS 5.5 64bit

# ptunnel > /dev/null 2 >&1 &



Open Port on Server (8000 or whatever it that will be used for tunneling)

# setup

and then choose Firewall configuration >> Customize


do as shown in the picture:



ON CLIENT

ptunnel -p ptunnel.example.org -lp 8000 -da ssh.example.org -dp 22


If you using ptunnel client on windows, make sure you copy ptunnel.exe to folder system32 before running that command on command prompt and WinPcap has installed on your system.

ON SSH CLIENT

Using PuTTY or Bidvise Tunnelier to login to your SSH.

Setting on SSH Client:

Host : 127.0.0.1
Port : 8000