Squid 2.6 and option httpd_accel_with_proxy from 2.5 versions

[Robert <vipit@xxxxx>]

helo
how in squid-2.6.stable1 deny access for proxy in transparent mode (like 
option httpd_accel_with_proxy in 2.5 versions)
http_port 3128 transparent in squid.conf  and iptables -t nat -I 
PREROUTING -s 192.168.0.0/24 -p tcp --dport 80 -j REDIRECT --to-port 
3128 works ok, in transparent mode
but i don't want that users may set up proxy ip address manually and can 
connect to squid box on port 3128 (in versions 2.5 clients can't connect 
when option httpd_accel_with_proxy options denied connections 
clientAccessCheck: proxy request denied in accel_only mode), how i can 
correctly set up these feature in version 2.6)

Best Regards
Robert