This is useful if certain hosts in a subnet should be connected directly and others should be connected using a proxy. The following function compares a given IP address pattern and mask with the hostname. See note on the isResolvable function at the top of the page.Įxample 4: If host is in specified subnet, connect direct. ![]() This is useful when an internal DNS server is used to resolve all internal hostnames. If it cannot, the connection is made via proxy. If it can, then a direct connection is made. The following function asks the DNS server to try to resolve the hostname passed to it. The dnsDomainIs function returns true if the domain of the hostname matches the domain given.Įxample 3: If host is resolvable, connect direct.The localHostOrDomainIs function is executed only for URLs in the local domain.The following function checks to see whether the host is either a "plain" hostname (meaning the domain name is not included) or part of a particular domain (.) but the hostname is not either www or home. Not all requests to local webservers are done using just hostnamesĮxample 2: Hosts inside the firewall connect direct, outside local servers connect via proxy Note: For a direct connection to local webserver, a domain or subnet match might also be needed. If so, it returns false otherwise, the function returns true. The isPlainHostName function checks to see if there are any dots in the hostname. If the hostname is not a local host, the connection is through the proxy (proxy). The following function checks to see whether the hostname is a local host, and if it is, whether the connection is direct. For example, the references window.open(.), alert(.), and password(.) all cause the proxy auto-configuration file to fail on Internet Explorer.Įxample 1: Local hosts connect direct, all others connect via proxy References to Object Model objects, properties, or methods cause the proxy auto-configuration file to fail silently. ![]() The isInNet, isResolvable, and dnsResolve functions query a DNS server.To use these functions, you must change the proxy names, port numbers, and IP addresses. pac' file could be used to specify an auto-proxy URL. The following scripts provide examples of how a '. JavaScript or JScript Auto-Proxy Example Files Reference Link: JavaScript or JScript Auto-Proxy Example Files Proxy list file software#For further assistance, please contact the software vendor. The information is provided as a courtesy for your convenience. Note: This Knowledge Base article references software which is not maintained or supported by Cisco. What is a Proxy Pac file, and are there any examples?Įnvironment: Cisco Web Security Appliance
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