I test this two antivirus Drweb and avast fot icap Drweb bad support for preview mode :( and many bugs Avast don?t support preview ==================================================== "from avast support Thank you for your answer. Now I know what you mean. But WebGate don´t support the feature you describe. WebGate can only scan the complete file not a part. It would make no sense for WebGate to scan only a part of the file. We hope for your understanding." ==================================================== Im have one quiestion Whether I can make similar ACL? Example: Acl size url_regex_filelenght =<1mb :) icap_enable on #acl stream url_regex -i .mp3 .vqf .avi .mpeg .mpe .mpg .qt .ram .rm .raw .wav .mov .wmv .htm .html .gif .jpg .jpeg #acl progs url_regex -i .exe .scr .com .dat .rar .zip .cmd .vbs .vba .jar .386 .bin .dll .drv .pif .txt .doc .xls .ppt .rtf .pps .sys .vxd .vst .php .cab .ms #drweb icap_service service_1 respmod_precache 1 icap://localhost:1344/respmod no-keep-alive icap_class class_1 service_1 icap_access class_1 allow progs !QUERY icap_preview_enable on icap_preview_size 1024 icap_check_interval 5 icap_send_client_ip on #avast #icap_service service_1 respmod_precache 1 icap://localhost:1344 no-keep-alive #icap_class class_1 service_1 #icap_access class_1 allow all !stream !QUERY #icap_access class_1 allow progs !QUERY #icap_preview_enable on #icap_preview_size 1024 #icap_check_interval 5 #icap_send_client_ip on