ICAPThe Internet Content Adaption Protocol (ICAP) is today's status quo
if you like to link an Internet proxy, cache or gateway with a filtering service
on a callout server.
Current version is 1.0 (ICAP/1.0). ICAP is a typical
client-server protocol similar to HTTP and it has been developed to vector HTTP
content from proxies to filter services. We at webwasher extended ICAP usage to
also encapsulate FTP and SMTP data.
There are several interesting products
available from well-known vendors that include either an ICAP client or an ICAP
WebWasher is the only product that includes both, an ICAP client and
server, and uses this protocol not only for talking to 3rd party products but
also for its internal communication.
Finally in April 2003, the ICAP protocol
became RFC 3507.
ICAP specification RFC 3507 (local copy)
ICAP errata page (local copy) published as RFC errata
Documented ICAP extensions in this Internet-Draft expired(local copy)
Organisation of ICAP vendors: The ICAP Forum
Mailing list: ICAP newsgroup
Info about open proxy Squid ICAP project
Back to homepage
Last Change: 2007-04-19