vivek chal wrote: > hello all > > i have made a server which is acting as a dhcp,dns and internet > gateway in scientific linux 4.5. Now i want my clients won't access > some websites such as orkut,facebook etc . Also i don't want to use > proxy. Please help me . > The best practice is to setup filtering with a transparent proxy or bridging firewall, there are other filtering mechanisms which require updating the filters often or manually. There are also custom LiveCDs, Wifi Hotspot Apps & Firewall Distro's that have all this built into a simple appliance distro which may be better suited for your application. Setup a transparent proxy with Squid in three easy steps - 200712 NixCraft http://www.cyberciti.biz/tips/linux-setup-transparent-proxy-squid-howto.html How To Block WebPages Based On Keywords Or Phrases With SafeSquid Proxy Server http://www.howtoforge.com/blocking-webpages-based-on-keywords-or-phrases-with-safesquid-proxy http://www.howtoforge.com/how-to-enforce-google-safesearch-with-safesquid-proxy-server http://www.howtoforge.com/how-to-block-porn-pictures-and-images-with-safesquid-proxy-server How To Set Up Shorewall (Shoreline) 4.0 Firewall On CentOS 5.1 http://www.howtoforge.com/how-to-set-up-shorewall-firewall-on-centos-5.1 A parent's guide to Linux Web filtering - 200407 Linux.com http://www.linux.com/articles/113733 DansGuardian http://dansguardian.org/ -HTH Art@JAX
