PAC file (proxy auto configuration)

• Create http directory

mkdir -p /var/www/html/pac

• Put to http directory

nano /var/www/html/pac/proxy.pac

function FindProxyForURL(url, host)
{
        if (shExpMatch(host, "(*.2ip.ru|2ip.ru)")) {
                return "HTTPS proxy.company.com:443";
        }
    return "DIRECT";
}

• Publish PAC file on your web server Please see nginx MD