How do I install Squid Proxy server on CentOS 5 Liinux server?
Sure Squid server is a popular open source GPLd proxy and web cache. It has a variety of uses, from speeding up a web server by caching repeated requests, to caching web, name server query , and other network lookups for a group of people sharing network resources. It is primarily designed to run on Linux / Unix-like systems. Squid is a high-performance proxy caching server for Web clients, supporting FTP, gopher, and HTTP data objects. Unlike traditional caching software, Squid handles all requests in a single, non-blocking, I/O-driven process. Squid keeps meta data and especially hot objects cached in RAM, caches DNS lookups, supports non-blocking DNS lookups, and implements negative caching of failed requests. Squid consists of a main server program squid, a Domain Name System lookup program (dnsserver), a program for retrieving FTP data (ftpget), and some management and client tools.
Install Squid on CentOS / RHEL 5
Use yum command as follows:
# yum install squid
Output:
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package squid.i386 7:2.6.STABLE6-4.el5 set to be updated
--> Running transaction check
Dependencies Resolved
================================================
Package Arch Version Repository Size
================================================
Installing:
squid i386 7:2.6.STABLE6-4.el5 updates 1.2 M
Transaction Summary
================================================
Install 1 Package(s)
Update 0 Package(s)
Remove 0 Package(s)
Total download size: 1.2 M
Is this ok [y/N]: y
Downloading Packages:
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing: squid ######################### [1/1]
Installed: squid.i386 7:2.6.STABLE6-4.el5
Complete!
Squid Basic Configuration
Squid configuration file located at /etc/squid/squid.conf. Open file using a text editor:
# vi /etc/squid/squid.conf
At least you need to define ACL (access control list) to work with squid. The defaults port is TCP 3128. Following example ACL allowing access from your local networks 192.168.1.0/24 and 192.168.2.0/24. Make sure you adapt to list your internal IP networks from where browsing should be allowed:
acl our_networks src 192.168.1.0/24 192.168.2.0/24
http_access allow our_networks
Save and close the file. Start squid proxy server:
# chkconfig squid on
# /etc/init.d/squid start
Output:
init_cache_dir /var/spool/squid... Starting squid: . [ OK ]
Verify port 3128 is open:
# netstat -tulpn | grep 3128
Output:
tcp 0 0 0.0.0.0:3128 0.0.0.0:* LISTEN 20653/(squid)
Open TCP port 3128
Finally make sure iptables is allowing to access squid proxy server. Just open /etc/sysconfig/iptables file:
# vi /etc/sysconfig/iptables
Append configuration:
-A RH-Firewall-1-INPUT -m state --state NEW,ESTABLISHED,RELATED -m tcp -p tcp --dport 3128 -j ACCEPT
Restart iptables based firewall:
# /etc/init.d/iptables restart
Output:
Flushing firewall rules: [ OK ]
Setting chains to policy ACCEPT: filter [ OK ]
Unloading iptables modules: [ OK ]
Applying iptables firewall rules: [ OK ]
Loading additional iptables modules: ip_conntrack_netbios_n[ OK ]
Client configuration
Open a webbrowser > Tools > Internet option > Network settings > and setup Squid server IP address and port # 3128.
Everything booted great and now it is bearable to have it on my lap. The T5300 only cost me $75 on ebay.
The battery still last 3+ hrs which is way better than the 1hr and 46min I had on the celeron. Now using the Power Saver mode in Vista keeps the computer in a useable state because 800Mhz on the RMclock far outclasses the Celeron in the same mode.
The performance is amazing and my friends/family are all intrigued by this sub $500 fully upgraded Acer 3680. Packing 1.5 gigs of ram and a Core 2 Duo processor. I can even play Halo with a stable FPS of 30. The GMA 950 is not so bad anymore for older games .
Ran a 32m Benchmark w/ wPrime and it finished in 42 seconds. Celeron M 520 ran the same benchmark in 125 seconds. I'll let you people be the judges of performance.
If anyone wants any tips, help, or comments on Performance/Upgrading I'm here.
Savings and Costs:
Total Cost for a Core 2 Duo system with a T5300 and 2 Gigabytes of Ram on average: $956 USD+ (HP dv6000t)
Total Cost of Acer Aspire 3680 ($399.99) upgraded with Core 2 Duo: $479.99 USD (Increased Performance)
Total Cost of Acer Aspire 3680 with T5300 and 2 Gigabytes of PC-5300 Ram: $545.91 USD (Optimal Performance)
Memory from: www.memory-up.com
Cost for 2x1Gig PC-5300 is $32.96 USD
Helpful Links for 3680 Users:
http://paulsiu.wordpress.com/2007/09...cer-3680-2833/ Blog that started it All
http://www.acerpanam.com/synapse/dat...S3680_3505.zip v1.3505 bios needed
>>*UPDATE*: link for the newest Aspire 3680 bios ftp://ftp.support.acer-euro.com/note.../bios/3508.zip
http://forum.notebookreview.com/showthread.php?t=155958 Info for those who have the 940GML
http://www.cpuid.com/download/pcw2008_v184.exe Link to PC Wizard for checking the chipset
http://en.wikipedia.org/wiki/List_of...icroprocessors Near the Bottom are the Mobile Core 2 CPUs
http://forum.notebookreview.com/showthread.php?t=77860 Guide for Adding Artic Silver 5 Thermal Compound
http://forum.notebookreview.com/show...76&postcount=1 Alternate Guide for adding AS5
http://forum.notebookreview.com/showthread.php?t=60416 Windows Updates for Upgrades to C2D Processors
http://youtube.com/watch?v=pPdw-pkS88k Acer Notebok Disassembly Guide (Not of a 3680, but Basic Idea)
Helpful Links for 5315 Users provided by BigOzone:
http://forum.notebookreview.com/showthread.php?t=251130 Upgrade Guide for 5315 Users!
Working Chipsets for the Core 2 Duo Upgrade:
Intel 943GML Chipset/i943 Calistoga
Intel 945GML Chipset
Working Chipsets for the Core Solo Upgrade:
Intel 940GML Chipset
How To Identify Your Chipset:
If the Cover for the RAM bay is pulled off on the Ram Bay there is a sticker. The code on the stick identifies your laptop chipset.
Here they are:
MB.TEB06.003... If it starts with that it is a 940GML
MB.AZL06.... If it starts with that it is a 943GML
MB.TDX06.... If it starts with that it is a 945GML
Working Models for the Core 2 Duo upgrade:
Acer Aspire 3680-2633
Acer Aspire 3680-2682
Working Models the Core Solo Upgrade:
Acer Aspire 3680-2574
UPDATE
You can in fact upgrade to The Merom T7200 & T7600 that came out before the Santa Rosa Refresh.
Current Facts known:
* Motherboard Model can be found on the Sticker above the RAM bay. (Find Courtesy of Hoggie)
* Core 2 Duos out perform most Core Duos in performance. They also have newer Speedstepping technology to optimize battery life.
* Dual-Core is Supported only by the 943GML Chipset and Above
* Only works with v1.3505 bios and Above
* The T5200, T5300, T5600, T7200 Are Known to Work
* Socket M Celerons can switch to the above C2Ds
* PC Wizard can be used for identifying your chipset
* The C2Ds are easily purchased through ebay, but I recommend staying away from bids and using "Buy it now function" as long as it is under $80 USD.
* Of Course if your looking to save money you can go with n4r4k's idea and get a T2080 Core Duo, which is reported to work on the Aspire 3690
PS: We are always here to help!
Thank You to:
Dedicated to the Acer Team: Hoggie, Andy, BigOzone, TeeJay44, Krazyphire
Featured News Bit: http://www.notebookreview.com/default.asp?newsID=4242 Credit to Chaz (NBR MOD) and Theo (TeeJay 44)
Tokyo, May 8, 2009 - (JCN Newswire) - Fujitsu Microelectronics Limited today announced 2 new transcoder ICs that can convert between Full HD (1920 dots x 1080 lines) MPEG-2(1) video data and H.264(2) video data, as well as transcoding between audio formats while featuring a low power consumption of only 1.0 Watt(W) including the in-package memory. These new ICs are targeted to support the growing number of electronic equipment that can record digital broadcasts. By employing Fujitsu's proprietary transcode technology, Fujitsu Microelectronics realized industry-leading low power consumption. Combined with the small form-factor packaging, these ICs can be used not only for non-mobile fixed electronic equipment - such as digital video recorders (DVRs) - but also in such mobile products such as notebook PCs. In addition to the transcode function, security functions are included on a single chip to make it easy for customers to create their systems. Sample shipment of the new transcoder ICs, the MB86H57 and MB86H58, will begin from late July, 2009.
Digital TV broadcasts - including HD - are increasing worldwide, while demand for HD video recorders is also increasing. As many broadcasts still use MPEG-2 format, many such HD video recorders have a transcode function to convert the MPEG-2 data to the higher compression H.264 format, so that more data can be recorded onto certain media (hard-disk, DVD disc) and thus offer longer recording times. At the same time, there are increasing needs to record digital broadcasts on mobile products such as notebook PCs, as well as the increasing demands to create electronic appliances that use less energy. To meet these demands for low power consumption and small form-factors, Fujitsu Microelectronics developed these two transcoder ICs.
These new transcoder products use Fujitsu Microelectronics' low power consumption technologies that have been used in its previously announced H.264 Full HD CODEC ICs, including utilizing proprietary video algorithms developed by Fujitsu Laboratories, that maintain high video quality while reducing the processing load. Thus, when transcoding, an industry-leading low power consumption of 1.0W - including the power consumption of the in-package memory - was realized.
These transcoders also include audio transcode functionality, security functions for digital rights management of content, and a demodulator interface all integrated on one chip as well as in-package memory. The MB86H57 trancoder has a small 15mm x 15mm package ideal for adding video recording capability to compact electronic equipment. Therefore, these ICs can be used not only in non-mobile fixed electronic equipment, but they also enable expansion of the new recording functionality to such mobile products such as notebook PCs.
Leveraging Fujitsu's highly regarded expertise in image and video processing-related technologies and products, Fujitsu Microelectronics will continue to strengthen its video processing ICs for the recorder and set-top-box markets, focusing on video-processing ASSPs.
Sample Shipment: MB86H01 SeriesProduct Package Sample Availability
Sales Target
MB86H57 FBGA 650 pin From end of July 2009
MB86H58 PBGA 496 pin From end of July 2009
200,000 units/month in the first year for both products
Key Features
1. Industry-leading low power consumption and small form-factor
Utilizing Fujitsu Microelectronics' proprietary transcode technologies, a Full HD H.264/MPEG-2 transcoder with industry-leading low power consumption was realized. In addition, utilizing one 512M bit memory (FCRAM(3)) in-package, as well as the usage of 65nm process technology, the power consumption during Full HD transcoding, is kept down to 1.0W, including the in-package memory power consumption. Also, it is provided in a small form-factor, 15mm x 15mm package, so it can be used not only in fixed electronic equipment, but also in such mobile products such as notebook PCs.
2. 1-chip integration of necessary functions for recording digital broadcasts
In addition to the transcode and encode functions, security functions, and demodulator interface are all integrated on one chip, thus providing the necessary functions for creating systems for recording digital broadcasts and thereby making it easy for customers to create their systems.
3. H.264/MPEG-2 bi-directional transcoder functionality
In addition to transcoding from MPEG-2 to H.264, as did the previous MB86H52 product, these new ICs also transcode from H.264 to SD MPEG-2, thus being able to handle the various formats likely encountered during use. Furthermore, with audio transcoding included, the high quality audio needs of discerning customers can be met.
4. Abundant interfaces to connect peripheral ICs
Both products contain many interfaces for improved connectivity. As a host interface to connect to an external CPU, there is a 16 bit parallel interface and a TS interface as the video stream interface. In addition, there is a serial interface, PCI, PCI Express, and USB interface integrated. Connection to external ROM is also possible, thus realizing high-speed boot for products that feature this IC.
Key Specifications of the MB86H57 and MB86H58 Transcoder ICs:
http://img.jp.fujitsu.com/downloads/jp/jed/fml-en/release/20090508.pdf
(1) MPEG-2: A video compression format (codec) that is part of the MPEG standard for video compression. MPEG-2 is widely used in DVDs and other video products.
(2) H.264: Refers to MPEG4 AVC/H.264, a video-encoding format (codec) noted for offering more compression than MPEG-2 and other earlier formats. Jointly defined by the International Telecommunication Union, Telecommunication Standardization Sector (ITU-T) and International Organization for Standardization/International Electrotechnical Commission (ISO/IEC), it is the most recent international standard for video compression.
(3) FCRAM (Fast Cycle RAM): Fujitsu Microelectronics' proprietary RAM core architecture featuring high-speed and low power consumption.
You’ll need to do a "clean installation." That means you can’t upgrade an existing PC to Windows 7 RC. So if you’re using an existing PC and want to keep the information on it, you’ll need to back it up before you start.
1. Turn on your computer, insert the Windows 7 RC installation disc you created in step 2 into the computer's DVD or CD drive, and then do one of the following:
If you want to replace your computer's existing operating system with the Windows 7 RC, and you don't need to adjust your disk partitions, go to step 2.
If your computer doesn't have an operating system installed, or you want to install the RC on another disk partition, restart your computer with the installation disc inserted in your CD or DVD drive. If you're asked to press a key to boot from DVD or CD, press any key. If the Install Windows page appears, go to step 2.
If the Install Windows page doesn't appear and you're not asked to press a key to start from DVD or CD, you might have to specify that your computer uses its DVD or CD drive as the startup device. See Start Windows from a CD or DVD. After you select your DVD or CD drive as the startup device, restart your computer, and then start Windows from the installation DVD or CD as previously described.
2. On the Install Windows page, follow the instructions, and then click Install now.
3. On the Get important updates for installation page, we recommend getting the latest updates to help ensure a successful installation and protect your computer against security threats. You need an Internet connection to get updates.
4. On the Please read the license terms page, if you accept the license terms, click I accept the license terms. (You must accept to continue the installation.)
5. On the Which type of installation do you want? page, click Custom.
6. On the Where do you want to install Windows? page, do one of the following:
If you don't want to specify a specific partition to install Windows on, or create partitions on your hard disk, click Next to begin the installation.
If you already have another existing partition with enough free space and want to install the Windows 7 RC on that partition to create a multiboot configuration, select the partition you want to use, and then click Next to begin the installation. (Be sure to install the RC on a different partition from where your current version of Windows is installed.)
If you want to create, extend, delete, or format a partition, click Drive options (advanced), click the option you want, and then follow the instructions. Click Next to begin the installation. (If the Drive options (advanced) option is disabled, you need to start your computer using the installation disc.)
7. Follow the instructions.
Equip your Area-51 m15x with an NVIDIA® GeForce® 9800M GT with 512MB of dedicated graphics memory, and experience the undeniable power of this advanced GPU. It features a core clock running at 500MHz and a 1,250MHz shader clock.
16X full-screen anti-aliasing capabilities mean that not only does the GeForce 9800M GT allow you to run circles around any game opponent, but you can take them out long before they even know you’re coming. NVIDIA armed the GeForce 9800M GT with some of the most advanced graphics technology imaginable.
DirectX® 10 — delivers dynamic environmental lighting and weather along with film-quality effects for collisions, smoke, fog and larger-than-life explosions, creating a life-like gaming experience.
NVIDIA PureVideo HD — relieves the CPU of all Blu-ray Disc® decoding, freeing the processor to support features such as “picture-in-picture” movies, interactive games and menus and higher bit-rates.
NVIDIA Lumenex engine — delivers ultra-smooth images at higher frame rates for enhanced realism in gaming.
The Area-51 m15x features Alienware’s BinaryGFX technology. The NVIDIA graphics card operates in conjunction with an integrated graphics processor for the ultimate blend of performance and power. The onboard graphics processor reduces power consumption during low intensity tasks. Switching to the GeForce 9800M GT unleashes your computer’s full graphics capabilities.
Wi-Fi (for wireless fidelity) is a wireless LAN technology that enables laptop PC’s, PDA’s, and other devices to connect easily to the internet. Technically known as IEEE 802.11b, Wi-Fi is faster and less expensive than standard Ethernet and other common wire-based LAN technologies. Several Wi-Fi hot spots have been popular over the past few years. Some businesses charge customers a monthly fee for service, while others have begun offering it for free in an effort to increase the sales of their goods.
Wireless energy transfer
Main article: Wireless energy transfer
Wireless energy transfer is a process whereby electrical energy is transmitted from a power source to an electrical load that does not have a built-in power source, without the use of interconnecting wires.
Computer Interface Devices
Answering the call of customers frustrated with cord clutter, many manufactures of computer peripherals turned to wireless technology to satisfy their consumer base. Originally these units used bulky, highly limited transceivers to mediate between a computer and a keyboard and mouse, however more recent generations have used small, high quality devices, some even incorporating Bluetooth. These systems have become so ubiquitous that some users have begun complaining about a lack of wired peripherals.[who?] Wireless devices tend to have a slightly slower response time than there wired counterparts, however the gap is decreasing. Initial concerns about the security of wireless keyboards have also been addressed with the maturation of the technology.
Many scientists have complained that wireless technology interferes with their experiments, forcing them to use less optimal peripherals because the optimum one is not available in a wired version.[who?] This has become especially prevalent among scientists who use trackballs as the number of models in production steadily decreases.