squidguard
 

can any one describe the purpose of squidguard,
i can block destion and source domain then whats especial in squidguard.

you ever tried to configure squid with an acl of dstdomain or srcdomain using a list of hundred's of thousands of urls?

Squidguard can redirect when it catches a blocked site and can do it much more efficiently (less system intensive) than squid's acls (dstdomain and srcdomain). Squidguard's database system can allow it to handle those hundreds of thousands of domains where squid would just choke and die.

I currently have a 4.4 MB PLAIN TEXT file of urls. I wouldn't even try and load that in squid.

thanks
can you tell that is it possible to change banner on msn or any banner on web to my own banner

yes, but if the banner represents a hyperlink, the link will still be there and will be clickable. You would have to block the domain where the banner image comes from and then block the domain of the hyperlink as well.