Setting up a Squid proxy with Clamav anti virus using c icap. Security is all about a defence in depth strategy. Create multiple layers of defence. Every layer presenting a different set of challenges, requiring different skill sets and technology. So every layer will increase the time and effort to compromise your environment. A content scanning proxy server may provide you with one of these defensive layers. A content scanning proxy checks all data for malware. How To Install Cgi Proxy Web' title='How To Install Cgi Proxy Web' />It blocks all content presumed to be infected. This may prevent numerous infections of company computers. How To Install Cgi Proxy' title='How To Install Cgi Proxy' />Basically, the proxy server is virusscanning all network traffic. But there is a severe limitation. Any data requested through an SSL connection https cannot be scanned, precisely because it is encrypted. So if a blackhat is smart and serves all malware through HTTPS, a content scanning proxy will not stop that malware. There are man in the midle solutions that do allow you to inspect SSL traffic, but there are some limitations and this is outside the scope of this post. As I believe that most malware is still being served through unencrypted HTTP sites, a content scanning proxy does create an extra layer of defence. I think it is worth the effort. So I decided to create a content scanning proxy based on available open source software. In this case, open source as in free to use in commercial settings. So in this post I will document how to setup a content scanning proxy based on Squid 3. Squidclamav module and the Clamav anti virus scanner. The basis of this proxy server is Ubuntu 1. LTS. Important How does it work The Squid proxy server must pass all content to the Clamav daemon. Squid cant do that by itself. I did followings to install centos 6. Why a locallybound proxy doesnt work The Problem. If youre running a locallybound proxy, e. WONT WORK in Docker for Mac. Installing Apache Ant Getting Apache Ant The Short Story. Crack Para Windows 7 Esta Copia No Es Original. To get up and running with the binary edition of Ant quickly, follow these steps Make sure you have a Java. How To Install Cgi Proxy Download152 Responses to How to install smokeping under windows Derek Says July 5th, 2006 at 1117 pm. Blender Animation Software Minecraft. How do you install SysLog support under windows Security is all about a defenceindepth strategy. Create multiple layers of defence. Every layer presenting a different set of challenges, requiring different skill. This is the opposite of the install command and removes the specified roles or features. The table below provides you with a complete list of the components. Step by step guide on how to setup and configure a Debian 7 webserver with nginx, php fpm and mariadb. Also called a LEMP web server. While processing a request the server looks for the first existing configuration file from this list of names in every directory of the path to the document, if. How do I install Piwik What are the requirements for installing Piwik Is there a Video that explains how to Install Piwik Do I need to create a MySQL databaseIts needs some glue service. For this purpose, a standard protocol has been designed called ICAP. The c icap daemon, combined with the squidclamav module, is the glue between the proxy server and the anti virus software. The fun thing about c icap is that you can add extra content scanning features if you want, just by adding those modules. You can decide to implement additional commercial anti virus products in addition to Clamav. How To Install Cgi Proxy Browser' title='How To Install Cgi Proxy Browser' />Installing Clamav and c icap development files. Apache or any other HTTP server with CGI support is required to display virus warnings to end users. Installing squidclamav module for c icap. Do not install squidclamav with apt get, this version seems to contain bugs that prevent pages from loading properly. The latest version straight from the vendor does work properly. Squid configuration. Please download my sample Squid. The icap lines are of interest. How To Install Cgi Proxy Site' title='How To Install Cgi Proxy Site' />X Authenticated User. It is the icap URL that calls a particular icap service squidclamav that processes all data. Squidclamav icap module configuration. The configuration is stored in etcsquidclamav. I used maxsize 5. Of interest is the redirect url, which tells the user that a virus is found. That line redirects the user towards a page as shown at the beginning of this post. You can customise this page with CSS, for example, you can add the company logo to make it more official. This is the configuration I use Pid. File varrunc icapc icap. Commands. Socket varrunc icapc icap. Max. Keep. Alive. Requests 1. 00. Keep. Alive. Timeout 6. Min. Spare. Threads 1. How To Install Cgi Proxy' title='How To Install Cgi Proxy' />How To Install Cgi Proxy ServerMax. Techsoft 2D Design V2 Free Download For Mac. Spare. Threads 2. Threads. Per. Child 1. Max. Requests. Per. Child 0. Server. Admin youyour. Server. Name Anti Virus Proxy. Max. Mem. Object 1. Modules. Dir usrlibcicap. Services. Dir usrlibcicap. Template. Dir usrsharecicaptemplates. Template. Default. Language en. Load. Magic. File etcc icapc icap. Remote. Proxy. Users off. Remote. Proxy. User. Header X Authenticated User. Remote. Proxy. User. Header. Encoded on. Server. Log varlogc icapserver. Access. Log varlogc icapaccess. Service echo srvecho. Service squidclamav squidclamav. Configuring Apahce web server. The warning page should be put in usrlibcgi bin. You may have to copy clwarn. Also make sure that your Apache configuration contains a directive like Script. Alias cgi bin usrlibcgi bin. Directory usrlibcgi bin. Allow. Override None. Options Exec. CGI Multi. Views Sym. Links. If. Owner. Match. Order allow,deny. Allow from all. lt Directory. Automatic proxy configuration through DHCP and WPADTo make the entire setup extra nice, use your DHCP configuraiton to. Clients must be configured to autodetect proxy settings for this to work. Put a wpad. dat in the root directory of your http server function Find. Proxy. For. URLurl, host. Domain. Ishost, localhost return DIRECT. In. Nethost, 1. DIRECT. Plain. Host. Namehost return DIRECT. In. Nethost, 1. DIRECT. PROXY proxy. And also add the appropriate mime type for. Restart the apache webserver after these modifications. Now add the proxy to the DNS configuration of your DNS server like proxy. Most important, add this directive to the general portion of the configuration file option local proxy config code 2. Add this directive to the particular scope for your network option local proxy config http proxy. Restart your DNS and DHCP server. Monitoring proxy performance. The cagemgr. cgi file provides very detailed information about the performance of your Squid proxy. This is more relevant regarding actual cahcing performance than for anti virus scanning, but this may be of interest. Especially the general runtime information is of interest, as it shows the hit rate, memory usage, etc. First, make sure you take the appropirate precautions as not to expose this page to the entire company. If you have installed squid cgi just browse to http your. Some example data Cache information for squid. Hits as of all requests 5min 1. Hits as of bytes sent 5min 8. Memory hits as of hit requests 5min 0. Disk hits as of hit requests 5min 0. Final words. This whole configuration shouldbe sufficient to setup a content scanning proxy server. I have no experience how well this solution performs and you may have to do some benchmarks if your own to determine if it is capable of handling the traffic users generate. The fun thing about this setup is that it is modular. For example, you can have one Squid HTTP box, and a separate host. Clamav service. Besides the whole content scanning part, a proxy server, based on some non scientific tests, does seem to. It may save you an expensive upgrade to a faster corporate internet connection.