hello everybody
i have a proxy server in my LAN network that manage traffic in and out of my network, i closed all ports except 80 for http and 443 for https and 53 for DNS, the problem here is that i have kespersky (small office security Personel computers) installed on all machines and cannot perform update, so which ports should i open in the proxy server to allow kaspersky update???
great thanks for anybody who try to help me