acl our_networks src 10.0.0.2
http_access allow our_networks

acl files_limit url_regex -i .exe .mp3 .ace .avi .mpeg .mpe .mpg .qt .ram .rm .rvb .iso .bin .raw .wav .mov

delay_pools 1
delay_class 1 2 
delay_parameters 1 10240/10240 10240/10240
delay_access 1 allow our_networks files_limit