باز هم متشکرم جناب نکویی
تغعییراتی که گفتید اعمال کردم اما باز هم خطای قبلی رو میده اگر امکان داره بیشتر راهنمایی کنید :
acl all src xxxxxxxxxxxxxxxxxxxxxx
acl manager proto cache_object
acl localhost src 127.0.0.1/255.255.255.255
acl SSL_ports port 443 563
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 563 # https, snews
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 3401 #add by mehran for snmp port
acl Safe_ports port 901 # SWAT
acl purge method PURGE
acl CONNECT method CONNECT
http_access allow manager localhost
http_access deny manager
http_access allow purge localhos
http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports
http_access allow all
icp_access allow all
miss_access allow all
cache_effective_user squid
cache_effective_group squid
visible_hostname WebCache