HTTP Rule
There are 2 HTTP rule types. HTTP rule is for HTTP requests or HTTPS requests. It won't effect TCP connections.
USER-AGENT
USER-AGENT,Instagram*,DIRECT
Rule matches if the user agent of the request matches. Wildcard characters * and ? are supported.
URL-REGEX
URL-REGEX,^http://google\.com,DIRECT
Rule matches if the URL matches the regular expression.