Order of operation of ACL's

Hi,
When we try to access a site that is banned by an acl rule, the web browser
seems to try and load the page and our warning page does not come up until
the site starts to load rather than when the request is made. Is this normal
behaviour?

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Simon Bryan                    sbryan@olmc.nsw.edu.au
Information Technology Manager sbryan@mpx.com.au
OLMC Parramatta