用 squid 黎做 proxy server, 可以限制d 人係放工或者食飯時間以外, 唔可以去其他網站, 以下係部份 config:

# S – Sunday, A – Saturday, M – Monday, T – Tuesday, W – Wednesday, H – Thursday, F – Friday
# acl [name] time [day(s) of week] [from-to]
acl time_out time SA
acl time_out time MTWHF 19:00-23:59
acl time_out time MTWHF 13:00-14:00
acl time_out time MTWHF 00:00-10:15

# 去指定既網站無限制
http_access allow warehouse_pc allowed_ip
http_access allow warehouse_pc allowed_domain

# 放工同食 Lunch 無限制
http_access allow warehouse_pc time_out

# 如果唔符合以上既條件就唔去得
http_access deny warehouse_pc