Here is for all IPs: acl ms-messenger req_mime_type -i x-msn-messenger acl msn-messenger req_header User-Agent -i msn[[:space:]]messenger http_access deny ms-messenger http_access deny msn-messenger
Here is for all IPs: acl ms-messenger req_mime_type -i x-msn-messenger acl msn-messenger req_header User-Agent -i msn[[:space:]]messenger http_access deny ms-messenger http_access deny msn-messenger