Yes, this is right. If something went wrong with your proxy server just revert back your browser LAN settings to no proxy.
what if you have a large network with 100 to 200 units who use 1 squid proxy?do you have to edit back the ip line on the browser of each and every pc?
how about the usage of script configuration with the use of proxy.pac or WPAD.DAT file? this thread explains how:
automatic proxy configuration
As I have said in this tutorial, there are alot of proxy servers out there. But one of my favorite is squid. I have tested it so many times and to top it all, most ISP use it for their own. So I would preferably rely on a tested system.
hehe,i much expect you to reply that squid is free and ISA(Microsoft) is the most expensive firewall,but maybe you just tested squid alone.as I do tested both,they have same function thou squid is much more reliable and virus free caching,on my opinion: squid should be always use with all POSIX platform and not recommended for windows,i have no against the installation of squid on any microsoft platform,but for secure and safe network,i go for posix platform than to rely on microsoft's windows.
anyway,i also like to contribute some squid configuration:
to block access to specific websites,find the file called ACL on your proxy folder (i dont know if windows squid has that) and edit this just before the line:
http_access allow localnet
insert the following lines:
acl blocked_sites url_regex www.badsite1.com
acl blocked_sites url_regex www.badsite2.com
acl blocked_sites url_regex www.badsite3.com
http_access deny blocked_sites
execute the restartsquid commands, on windows platform this is more likely stopping or restarting squid under Services.
more squid config next time...