Hello again,
I have a friend who has 2 children (10 years old both) who is running opensuse 11.He told me to ask you if you know a way to give words somewhere and when his children or he click the link to enter a site,the site will be scanned for these words????

Thank you!!!

No idea??
Nothing to answer??

You need to wait a bit longer than that. LQ is an international forum and many members are at work or asleep. Is your friend wanting something like Net Nanny for Linux? Try www.dansguardian.org

See also http://www.linuxjournal.com/article/9044 and http://www.linux-tip.net/cms/content/view/297/26/ and try a search for "content filtering linux" or "content filter linux".

Also look at using opendns. If you register you can configure it to block bad sites. I don't know if it will also scan all sites and forums for bad words however or how current it's whitelist will be. You might want to try it out and give it a spin. If your friend uses a NAT router, putting OpenDNS address in the routers DNS settings will provide those dns settings for all the computers, Linux or Windows that are configured to use DHCP.

When the kids get older, they may learn to edit /etc/resolv.conf if they have their own computer. In this case your friend could have the internet traffic routed through his computer and redirect any dns traffic to opendns using an iptables rule, suc as:

This may be enough protection, or your friend could use Dan's Guardian & Squid as well. I think this method may be enough however. There are some pages on the web which outline what some schools and libraries use to filter traffic in a proxy server.