I installed an Ubuntu Server (Ubuntu 16.04.1 LTS) with the proxy Squid and Privoxy. Everything worked fine except ... When there are several Windows computers (no matter the Windows version) that connect to my Ubuntu Server via my proxy to go on the Internet (no matter the browser), I have a message in My Windows browser "Maximum number of clients reached". I can no longer access any website.
Could you help me find a solution to this problem please?