A Proxy Auto-Configuration (PAC) file is a JavaScript function that determines whether web browser requests (HTTP, HTTPS, and FTP) go directly to the destination or are forwarded to a web proxy server.
What is a PAC URL?
A proxy auto-config (PAC) file defines how web browsers and other user agents can automatically choose the appropriate proxy server (access method) for fetching a given URL. The URL of the PAC file is either configured manually or determined automatically by the Web Proxy Auto-Discovery Protocol.
What is isInNet?
isInNet() (host, pattern, mask) The isInNet()() function enables you to resolve a URL host name to an IP address and test whether it belongs to the subnet specified by the mask. This is the same type of IP address pattern matching that SOCKS uses.
What is dnsDomainIs?
The dnsDomainIs()() function detects whether the URL host name belongs to a given DNS domain. This function is also useful when you are using multiple proxies for load balancing in situations where the proxy that receives the request is selected from a group of proxies based on which DNS domain the URL belongs to.
How do I use a PAC file in Windows 10?
Configuring Internet Explorer to Use a PAC File
- Go to Administration > Hosted PAC Files.
- Copy the URL of the default PAC file for the Web to your clipboard.
- Open Internet Explorer and click the Gear icon to open the Tools menu, then click Internet options.
- Click Connections, then LAN Settings.
Where is PAC file stored?
PAC file addresses can be located on the Web > General page and on the General tab of a policy. In both locations, a default and alternate address is listed. Default PAC file address: the PAC file is retrieved over port 8082 by default, or 8087 for HTTPS. Browsing with this PAC file is performed via port 8081.
How do I set up a PAC file?
Configuring Google Chrome to Use a PAC File
- Go to Administration > Hosted PAC Files.
- Copy the URL of the default PAC file for the Web to your clipboard.
- Open Google Chrome, open the Chrome menu, then click Settings.
- Click Show advanced settings….
- Go to Network and click Change proxy settings….
- Click LAN settings.
What is shExpMatch?
The shExpMatch()() function matches either URL host names or URLs themselves. The main use of this function is for load balancing and intelligent routing of URLs to different proxy servers.
What is .PAC extension?
A PAC file is a configuration file used by web browsers to select an appropriate proxy server. It contains one or more JavaScript functions with one of them named FindProxyForURL, which defines rules for choosing a proxy server based on a given URL.
How does a PAC file work?
A proxy auto-configuration (PAC) file is a text file that instructs a browser to forward traffic to a proxy server, instead of directly to the destination server. Browsers simply require the address of the PAC file so they can fetch the file from the specified address and execute the JavaScript in the file.
How do I use a PAC file in Internet Explorer?
What is the use of shexpmatch?
shExpMatch()(str, shexp) The shExpMatch()() function matches either URL host names or URLs themselves. The main use of this function is for load balancing and intelligent routing of URLs to different proxy servers. str is any string to compare (for example, the URL or the host name).
How do I use shexpmatch instead of isInNet?
Whenever possible, use the shExpMatch function instead of isInNet. The following code snippets have identical results, although shExpMatch runs faster: The proxy script uses the JavaScript language. JavaScript is case-sensitive. Therefore, an if clause that is uppercase will never become true, while other parameters use lowercase.
What is the difference between dnsdomainis() and shexpmatch()?
Looking at the definitions from , they have very different functionality. dnsDomainIs () uses exact domain names – such as .google.com, while shExpMatch () uses shell-like strings with wildcards such as *.google.com.
