Hi, Does anyone here in the forum had already installed squid and dansguardian over webmin interface? I'm using fedora as proxy server and thinking if both softwares are able to install on webmin. If anyone does, please help. I installed Webmin and it was working great until I installed DansGuardian & squid and then webmin stopped. Why can't I access webmin since installing Dansguardian and squid? How to install webmin? Through the webmin interface a little later. Also this install guide is based on Webmin on RH 6.2. Adding patches (insert the patches CD Rom) Mount /dev/cdrom. Webmin index -> Others -> Dansguardian Restart. Webmin used to manage services like User management, Disk managemet, Network, Iptables, Apache, DNS, etc. In this article i will show you how to install webmin. You may find it simpler to just let the “Set Up Lists&Configs For Multiple Filter Groups” tool in the DansGuardian (Webmin) GUI do most of the work. Yum --enablerepo=smecontribs install smeserver-sarg. Koozali SME Server wiki. Wiki statistics; Wiki categories; Wiki Help; Search. This how-to describes how to install and configure Dansguardian with multi-group filtering, Squid with NTLM auth, ipmasq, and dnsmasq to provide a full internet gateway solution for small to medium sized networks. Squid Proxy Server - Webmin Documentation. This article explains what an HTTP or FTP proxy server is, and then explains how Webmin can be used to configure the popular Squid proxy server. Proxies are used on networks where clients do not have direct access to the Internet but still need to be able to view web pages. A proxy is also used for caching commonly requested pages so that if more than one client wants to view the same page it only has to be downloaded once. This may be done for security reasons, or to limit what employees can access on the Internet. Because being able to view web pages is extremely useful, a proxy is often set up so that websites can be accessed through it. Because one of the main tasks of a proxy is caching pages requested by clients, any page asked for more than once will be returned from the cache instead of being fetched from the originating server. For this reason clients systems are often configured or forced to use a caching proxy to access the web. Fortunately, every web browser in existence, and almost all programs that download files via HTTP for various purposes, can be configured to use a proxy. This tells them to make a special proxy HTTP connection to the proxy server instead, specifying the complete URL to download. Even encrypted SSL connections can be handled by a proxy, even though it cannot decrypt the request. Instead, the proxy simply forwards all data from the client to the destination server and back again. It is open source and is freely available for download from www. Linux distributions and many other operating systems. Squid supports both proxying, caching and HTTP acceleration, and has a large number of configuration options to control the behavior of these features. This file consists of a series of directives, one per line, each of which has a name and value. Each directive sets some option, such as the TCP port to listen on or a directory to store cached files in. Webmin's Squid module edits this file directly, ignoring any comments or directives that it does not understand. This means that a squid. Squid 2. 5 - and one from Squid 2. Fortunately, Webmin knows which directives each release supports and only allows editing of those that are known to the running version of Squid. Squid can be configured to use multiple separate cache directories, so that you can spread files over different disks to improve performance. Because some web pages change over time (or are even dynamically generated), Squid keeps track of the last- modified and expiry dates of web pages so that it can clear data from the cache when it is out of date. It may also start several other sub- processes for tasks such as DNS lookups or client authentication, but all the actual HTTP protocol processing is done in the single master process. Unlike other similar servers such as Apache or Sendmail, Squid does not start or use sub- processes to handle client requests. This means that the Webmin module's user interface is the same across operating systems as well, with the exception of the default paths that it uses for the Squid programs and configuration files. When its icon is clicked on, the page shown in the screenshot below will appear, assuming that Squid is installed and configured correctly. As you can see, the main page consists only of a table of icons, each of which can be clicked on to bring up a form for editing settings in that category. The module will detect this and display a message like *Your Squid cache directory /var/spool/squid has not been initialized* above the table of icons. To initialize the cache, follow these steps . If you are unhappy with the displayed cache directory, now is the time to change it. Follow the instructions in the *Adding cache directories* section to define your own directories before continuing. I recommend using the Users and Groups module (covered in chapter 4) to create a user called squid whose home directory is the cache directory if needed though. The Squid configuration will be updated to use your chosen username, and the command squid - z will be run to setup the cache directories. All output that it produces will be displayed so that you can see how the initialization is progressing. If you really do have it installed, read the *Configuring the Squid Proxy Server module* section for instructions on how to change the paths the module uses. On the other hand, if it really is not installed you should use the Software Packages module (covered on Software. Packages) to install the squid package. Linux distribution CD or website. As long as you have a compiler installed on your system, this is a relatively. All Linux packages include a bootup action script for Squid, although it may be disabled by default thus requiring you to enable it in that module. Otherwise you will need to create an action that runs a command like /usr/local/squid/bin/squid - s. Y. , assuming that you have Squid installed in /usr/local/squid. When Squid running, every page has two links at the top - Apply Changes which forces the current configuration to be re- read, and Stop Squid which shuts down the proxy server. If it is not yet running, you will probably want to start it now. If you are running an older or newer release, different fields may appear on the forms or have more or fewer options. For example, each new version has introduced different ACL types, and authentication has been handled in three different ways through the history of the program. However, the basic concepts have always been the same. Otherwise you run the risk of cutting off your own access to the module if you make a configuration mistake or shut down the server process. Because this is not the usual port that proxies are run on (8. You might also want to edit the listening address so that only clients on your internal network can connect, if your system has more than one network interface. In the Proxy addresses and ports table, select the *Listed below* option. In the table below, each row defines a listening port and optionally an address to bind to. Any existing ports and addresses will be listed, followed by a single blank row for adding a new one. In the first empty field in the Port column, enter a port number like 8. In the *Hostname/IP address* column, either select All to accept connections on any of your system's interfaces, or the second option to enter an IP address in the adjacent text box. Using this table, Squid can be configured to listen on as many ports as you like. ICP is a protocol used by Squid to communicate with other proxies in a cluster. To listen on a port other than the default of 3. ICP, fill in the ICP port field. This is not generally necessary though, as only other proxies ever use this protocol. This can be useful if all of the other proxies that your server might want to communicate with are on a single internal LAN. At most 1. 00 MB of data will be stored in this directory, which is not likely to be enough if serving a large number of active clients. If your system has more than one hard drive, it makes sense to spread the cache across multiple disks to improve performance. This can be done by specifying multiple directories, each with its own maximum size. It is unwise to configure or allow Squid to use up all free disk space, as many filesystems suffer reduced performance when nearly full. Furthermore, disk space may be used by log files and user data as well. If Squid fills up your entire hard drive, problems may occur because other programs are unable to create temporary files or write to logs. In the Cache directories field, select the Listed option. If you want to continue using this directory, it must be explicitly entered into the table. The default size is 1. MB, and it uses 1. Each row has fields under the following columns : Directory The full path to the top- level cache directory, such as /var/spool/squid or /disk. This directory must already exist and be owned by the use that Squid runs as (usually called squid) - the module will not create it for you. Type The storage type used in the directory. You should always select UFS here. Size (MB) The maximum amount of data that it will contain, in megabytes. Once this limit is reached, the oldest un- requested files will be replaced with new ones. The number of subdirectories that will be created under the cache directory. The default of 1. The number of subdirectories that will be created under each first- level directory. You should just enter 2. Options Leave this field blank - it is only used for other directory types. Because every single cached HTML page or image is stored in a separate file, the number of files on a busy proxy system can be huge. Spreading them across multiple directories solves this problem. After adding a directory, click the Save button at the bottom of the page. If you want to add more than one you will need to click on the Cache Options icon again to re- display the table with a new empty row. If a new one has been added, an error message like Your Squid cache directories have not been initialized will be displayed. Click the Initialize Cache button to have Squid create all the sub- directories in any new cache directories. They can be used to stop the server storing enormous files (such as downloaded ISO images), to limit the size of files that clients can upload or download, and to prevent the cache of pages that change frequently (such as those generated by CGI scripts). MB should be more than enough for anyone. This can be used by prevent the abuse of your network by clients downloading huge movies or ISO files, but can often be subverted by downloading a large file in pieces. Otherwise data will be cached for up to a year, or until it the expiry date set by the originating server. You can change the amount of time that errors are cached for by entering a number and selecting units in the Failed request cache time field. If Default is chosen, errors will be cached for 5 minutes.
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