Computer Learning, My Free Writing on Computer and Information technology

Are you confused on how to install squid proxy server on Linux Readhat 9, and how to configure transparent proxy. Well , follow steps below:

1. Download squid, you can do it by executing:
   #wget http://swelltech.com/support/updates/squid/9/i386/squid-2.5.STABLE3-1rh.i386.rpm
2. Then install it onto your server:
   #rpm -ivh squid-2.5.STABLE3-1rh.i386.rpm
3. Remove the original squid file:
   #mv /etc/squid/squid.conf /etc/squid/squid.conf.original
4. Make a new squid configuration file squid.conf:
   #vi /etc/squid/squid.conf
5. Copy codes below:
   http_port 3128
   icp_port 3130
   cache_mem 64 MB
   connect_timeout 2 minutes
   maximum_object_size 20480 KB
   minimum_object_size 0 KB
   maximum_object_size_in_memory 4096 KB
   cache_replacement_policy lru
   memory_replacement_policy lru
   cache_dir diskd /image 10000 16 256
   cache_access_log /var/log/squid/access.log
   cache_log /var/log/squid/cache.log
   cache_store_log none
   log_ip_on_direct on
   refresh_pattern ^ftp: 1440 20% 10080
   refresh_pattern ^gopher: 1440 0% 1440
   refresh_pattern . 0 20% 4320
   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 SSL_ports port 443 563 6667 7000
   acl Safe_ports port 80
   acl Safe_ports port 21
   acl Safe_ports port 443 563
   acl Safe_ports port 70
   acl Safe_ports port 210
   acl Safe_ports port 1025-65535
   acl Safe_ports port 280
   acl Safe_ports port 488
   acl Safe_ports port 591
   acl Safe_ports port 777 110
   acl Safe_ports port 5050
   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 all
   icp_access allow all
   cache_mgr yourname # enter your name here
   visible_hostname yourdomain.com #enter your domain here
   httpd_accel_host virtual
   httpd_accel_port 80
   httpd_accel_with_proxy on
   httpd_accel_uses_host_header on
6. Save the file
7. Make image folder:
   #cd /
   #mkdir image
8. Change the ownership of the group by executing:
   #chown -R squid.squid /image
9. Run the squid:
   #/etc/init.d/squid start
10. To make squid automatically started each time computer boots, execute this command:
    #setup
    find the ?system services?, run tool, find squid and choose it to activate
11. Enter the transparent proxy.
    #/sbin/iptables -t nat -A PREROUTING -i eth1 -p tcp ?dport 80 -j REDIRECT ?to-ports 3128
    #/sbin/iptables -t nat -A PREROUTING -i eth1 -p udp ?dport 80 -j REDIRECT ?to-ports 3128
12. To make transparent proxy automatically runs each time the server boots, then enter it into rc.local’s iptables, but set the iptables for the NAT first so that clients can use the internet. Use code below:
    #vi /etc/rc.local.

Well, i hope you understand my language…. haha ^_^

Tags: Proxy Server, Squid Proxy, Squid, Transparent Proxy, RedHat 9

Here are some steps you can do to make Hostpot using mikrotik:

1. Make a Radius server/ radius add service=hotspot address=127.0.0.1 secret=123456
2. Make profile and set the profile using Radius Server / ip hotspot profile set hsprof1 use-radius=yes
3. Make scriber / tool user-manager customer add login=”MikroTik” password=”secretzzz” permissions=owner
4. Add the router into localhost./ tool user-manager router add subscriber=MikroTik ip-address=127.0.0.1 shared-secret=123456
5. Browse the http://yourrouter/user

Using J2ME, you can make an interface using SVG (Scalable Vector Graphic) file. You can download IKIVO, one of the interactive content provider for cell phone. You can download it here and the netbean’s tutorial is here

Are you having difficulties searching for toshiba laptop’s driver download page. After searching for a while. Here it goes, the place where you can find Driver’s for toshiba laptop

Having photos taken by gps capable cam? and you want to know where the photos are taken. Use exifprobe, it is a command based syntax to extract gps’ latitude and longitude.
The data extracted was 3 segments, first means degree, second means minute, and third means second.
For example:

1. Latitude = 5,20,10 means 5? 20′ 10″ N
2. Longitude = 100,20,10 means 100? 20′ 10″ E

Then you can utilize Google Maps or Earth to know where the location of your picture.

One of the best compressing software is 7zip. Besides that it is free, it is also open source. Since the code is open source, this software can be heavily reengineered, one of the results is Portable version of 7Zip.
After browsing for a while, i found the latest 7Zip portable is released. So you can always extracts files or unzip it on the go, without having to install it on your computer.

Use open source, it’s free and no malwares.

7Zip portable’s release notes on Portableapps.com

Some hosting providers that use Cpanel disable Register global for the sake of security. But you could enable it by doing steps below:

1. login into cpanel
2. Click file manager
3. Click public_html
4. Click .htaccess and edit (make a new file if this file hasn’t yet exist).
5. Enter code below:

php_value register_globals 0    —————> to make it unactive
php_value register_globals 1    —————> to make it active

Many softwares can be used to perform Remote Desktop on Ubuntu. One of the best software is NomachineNX. You can see the details of this project by clicking this link, this software is  very interesting since allowing multisession login with different IDs.

NoMachineNX server can be remote controlled from Mac OS, Solaris and Windows. The servers are available for Linux (.rpm .deb and .tar.gz), Solaris. While the clients are available on Linux, Mac OS, Solaris and Windows.

sudo /usr/NX/bin/nxserver --status 

NX> 900 Connecting to server .. NX> 110 NX Server is running. 	 NX> 999 Bye. 

/usr/NX/etc/server.cfg 

ENABLEAUTOKILLSESSIONS = \"1\" ENABLEUNENCRYPTEDSESSION = \"0\" 

ENABLEUNENCRYPTEDSESSION = \"0\" 

/usr/NX/bin/nxlient 

Computer Networking is pervasive right now,you can find it on small company and big enterprise either. Right now i would like to tell a story about computer networking.

First, what computer network is? Most books define it as “a simple collection of computers (two connected computers qualify as a network) at one location that have been tied together using a particular connectivity medium (such as network cabling or wireless technology)”.

The second is why should you need a computer network? It was because network enables anything. The network can be used to transmit data, sound, and even video between users on the network. Many apps such as email and instant messaging are feasible due to computer network.

Computer Network usually consist of computers, connectivity media (eg: as copper wire or fiber optic cables), and other devices (eg: hubs, switches, and routers), and Network interface card. There are many technologies that can bind computers togather, such as network cabling (copper or fiber optics), radio waves, and microwave technology.

What a unique website, i found it from StumbleUpon.