E1207y Pac: File Work

Some proxies require explicit port 443 handling. E1207Y often does:

if (url.substring(0, 5) === "https") 
    return "PROXY ssl-proxy.company.com:443";

Based on destination TLD or resolved IP:

var euDomains = [".de", ".fr", ".uk", ".eu"];
for (var i = 0; i < euDomains.length; i++) 
    if (dnsDomainIs(host, euDomains[i])) 
        return "PROXY eu-proxy.company.com:8080";
// If host resolves to Asian IP range
var asiaRange = "203.0.113.0/24";
if (isInNet(dnsResolve(host), "203.0.113.0", "255.255.255.0")) 
return "PROXY sg-proxy.company.com:8080";
 e1207y pac file work

PAC files are pure JavaScript. Use your browser's console: Some proxies require explicit port 443 handling

Many e1207y scripts end with:

return "PROXY proxy.corp.com:8080; DIRECT";

The semicolon means "If proxy fails, go direct." This is a security nightmare. If the proxy is down, users bypass filters without noticing. Real workaround: Remove ; DIRECT for compliant networks. Based on destination TLD or resolved IP: var

Browsers cache PAC files aggressively. To force a refresh: