hi all, i hav setup squid that controls 3 different classrooms. each class has a range of ip addresses. i hav used the acl as per documentation & help that every1 has given me. acl machine src 192.168.10.21-192.168.10.41/255.255.255.0 but when i restart squid it generates the following warnings. aclParseipData; WARNING : Netmask masks away part of the speified IP in '192.168.10.21-192.168.10.41/255.255.255.0' what is wrong?? thanxs a billion DBH