wholesale medieval jewelry How to build a proxy server under Windows platform

wholesale jewelry vendors orange county ca Squid is the most popular proxy server software under Linux. It has powerful functions and supports agents for HTTP, FTP, Gopher, SSL, WAIS and other protocols. Setting is simple, and only a little changes to the configuration file can make the proxy server run. In addition, Squid has a page cache function, which accepts user download applications and automatically process the downloaded data. In the early stage, Squid's requirements for hardware are: memory should not be less than 128m, the faster the hard disk speed, the better, it is best to use the server special SCSI hard disk. The requirements for the CPU are not high. The proxy server managed by the author is Inter2150, which is installed with Red Hat Linux 7.2, and Squid is equipped during installation. There are two network cards, one ETH0 with an external address (such as 211.88.99.66), and an ETH1 with an inner network address (such as 192.168.5.1). If the GNOME or other graphics interface is installed, you can configure the IP address of the two network cards in NetConfig. Otherwise, you can change the file ifcfg-Eth0 and IFCFG-ETH1 under the/ETC/Sysconfig/Network-Script path. First edit IFCFG-EHT0, there are the following: Device = ETH0 (indicating which network card is used) ipaddr = 211.88.99.66 (set the IP address of the network card) Netmask = 255.255.255.252 (set the subnet mask) ETH1, and then run the command network restart to make the configuration take effect. After configured ETH0 and ETH1, you can use the iFconfig command to view whether the configuration is successful. If the server has only one network card and don't worry, Linux can bind multiple IP addresses on a network card. The configuration is very simple under the graphical interface, so do not repeat it. If you configure it in the text state, you can copy and name it ifcfg-eth0 to IFCFG-ETH0: 1, and use it completely as two network cards. Squid's installation 1. Install linux installation Linux at the hard disk partition, it is best not to let the system be partitioned, but manually partition. Generally, there is only one exchange partition in the Linux system (select Linux Swap in the form of a file system). It is used as a virtual memory. It is recommended to set the size of the switching partition to double the memory. When the size of the hard disk exceeds 8G, a BOOT partition of 128M (slightly larger, not wrong) is to be established. This is to avoid putting the system kernel files outside the 1024 magnetic tract. The kernel file will be installed anywhere in the root partition. Because it is necessary to use it as a proxy server, it is recommended to divide another partition "VAR" as a buffer area for Squid, so try to allocate as much as possible according to the size of the disk, and finally the remaining space of the hard disk to the ROOT partition. 2. Install Squid Novice Install Squid. It is recommended to select Squid when installing Linux. It is not a default selection, and it is not in the choice of large categories. It must be found in a detailed list. If you do n’t install it and you do n’t want to reinstall the system, you can download the Squid software. The Squid proxy server is almost available after installing the Squid. Use the editor to open the /etc/squid/squid.conf file (log in with root). The Squid configuration file has a total of 125 configuration items, but in general, as long Modify a few configuration items. Find "HTTP_ACCESS DENY All" and change to "http_access all" so that all computers can access Internet resources through agency services. In fact, as long as the item is modified, the Squid service can start. In order to better control the behavior of the proxy server, there are several configurable items that need to be considered: 1. Cache_mem: Set the memory size used in the proxy service, which is generally recommended as one -third of the physical memory. 2. Cache_dir: Set the position and size of the cache. The general format is as follows: Cache_dir/VAR/SPOOL/Squid/Cache 100 16 256 cache_dir specifies the path of the cache directory, the default is/var/spool/squid/cache. /Var/SPOOL/Squid/Cache represents the position of the cache. The Squid -Z instruction will create a directory of the storage switching file (SWAP FILES) in this directory. 100 means the maximum cache is 100m, 16 and 256 represent the number of first and secondary directory. In actual use, 100M is not enough. If the hard disk is large enough, it can increase the storage space, such as: Cache_dir/VAR/Spool/Squid/Cache 2000 16 256. 3. HTTP_PORT: The port number used for proxy services, the default is 3128, you can use other ports, pay attention to remove the previous annotation symbol "#". In addition, the use port cannot be repeated with other services. If you use ports below 1024, Squid must run as root. 4. Maximum_Object_size: Specify the size of the largest object that Squid can receive. The default value of Squid is 4M, which can be set according to your own needs. Start Squid Squid can be set to automatically start. Run the command setup and select Squid in the System Services option. After each time it is settled, Squid will be automatically executed. If it is the first start, to create a temporary data directory under the/var/spoo/squid, enter the Squid -Z first, and then start the Squid (run directly). After starting the Squid, run the IE on another Windows computer (take Internet Explorer 5.0 as an example), click "Tools", then click the "Internet Options", and then click the "Connection" tab. Select "LAN Settings" Essence Fill the IP address of the Squid server at the "address" in the "LAN setting" window, fill in the "3218" (Squid software default port number) at the "port" to determine the exit. Next, you can browse some websites to check the operation of Squid. You can also check the access.log and cache.log under the logs to see if the agent runs normally.