ICAP service and redirector for Squid
http://squidclamav.darold.net/

SquidClamav is an antivirus for Squid proxy based on the Awards winnings ClamAv
anti-virus toolkit. Using it will help you securing your home or enterprise
network web traffic. SquidClamav is the most efficient Squid Redirector and
ICAP service antivirus tool for HTTP traffic available for free, it is written
in C and can handle thousand of connections. The way to add more securing on
your network for free is here.

SquidClamav is build for speed and security in mind, it is first used and
tested to secure a network with 2,500 and more users. It is also known to
working fast with 15000+ users.