Proxy Pac Hosts File

For instance, moving a laptop from a home network with no proxy server to the office LAN, with a BorderManager server. pac file, use the following instructions to host it on Web Gateway: If you want to host the proxy. Since I'm a Windows n00b I spent some time figuring this out for myself. This registry key will force the browser to fetch the file and apply the new settings. The WSA also hosts the pac file on port 9001 by default. This PAC file checks to see if the host which is being looked up is a plain host name, i. PAC file, enable the "Automatic Proxy Configuration" checkbox. Why? This puts it in a folder normally reserved for system files (which is good, because this is a system file), the lack of a file extension makes it look like all the other files there (so it won't attract attention), and the. If the host ID changes between sessions, by default SSH generates a warning and refuses the connection. Name one "proxyconfig. Edit the Apache Configuration File To Handle Multiple Virtual Hosts. pac and wpad. The simple solution for this is to make wpad. dat) for their configuration, they just "look for it" in different ways. The final Apache configuration will include all httpd. 3,start app. Your home network—and everything connected to it—is like a vault. These are various ways you can use a proxy auto-configuration (. But the ad was run by a political action committee and not an individual politician, underlining the. pac as the file extension. We are going to copy it over to create a virtual host file for each of our domains. 1 and the proxy allows connections to 1. conf - nginx configuration. The hosts file contains a shortcut list for assigning name addresses (such as geeklad. This would allow for users to "fail open" if there is a "DIRECT" statement in the PAC file (go direct to. Auto Configuring Proxy Settings (Proxy Autodiscovery wpad. pac file might be inadvisable. WinINET no longer supports sourcing PAC files from file:// shares. All LAN hosts can then use this as their proxy address in the browser proxy configuration, but Privoxy will not listen on any external interfaces. PAC files can be edited with the use of a text editor because they contain JavaScript codes. pac file can be manually entered into each browser so that it will download the proxy settings (partial auto configuration), and lastly all modern browsers can also and indeed are configured by default to fully automatically configure themselves if the network is configured to support this. The name servers are prioritized in the order the system finds them in. Save the entries in the file (be sure to run your text editor as an administrator in order to save the file!) and run this command in a cmd prompt or Powershell prompt to flush the DNS cache so your updates take effect right away. For example, if you do not want to use the proxy when going to certain websites/networks, or return different proxies. So I have a proxy. Proxy and the Windows HOSTS file If you are connected to the Internet using AOL, a custom dialer provided by your ISP, through a Local Area Network (LAN) connection or a remote proxy server these procedures (using a HOSTS file) may not be effective. According to the International Monetary Fund’s World Economic Outlook report in July 2019, the slowdown in global manufacturing activity, which began in early 2018, has. Here are a few resources and tips to make that process easier. Sometimes on the same website go fine. However, before delving into configuration options, let's discuss the one that you've probably not encountered before: the LMHOSTS file. ssh/Known_hosts file is used as the Known_Hosts file if it. PAC files include the FindProxyForURL(url, host) JavaScript function that returns a string with one or more access method specifications. Authentication with LDAP or Kerberos. Step 3: The folder should contain either an index. pac or wpad file is to utilize the Rule Engine. Temporarily give the computer access to the entire Internet (like when running updates, or looking up more websites/IP addresses) by adding dns back into the nsswitch. pac file has been created by other people on the network, or prepare an PAC file on a your own host. To secure the communication between Filebeat and Elasticsearch, you can use HTTPS and basic authentication. How to edit hosts file on Linux; Then, we’ll also share a beginner-friendly tool that lets you preview your website on a new server before DNS propagates without the need to edit your hosts file, though it’s not quite as flexible as editing your hosts file. Use client proxy settings when intranet web servers are not directly accessible from the Access Policy Manager internal subnet. The legacy approach - perl script on web servers - was replaced by a TCL script I developed which runs on one of their F5 load balancers. conf file and saving. This enables SSH verification of the host ID to prevent man-in-the-middle or other attacks before the connection is made. DNS wpad entry is picked up by clients, as clients send wpad question to dchp when getting ip stuff. When used together, these files act like a wall, blocking where your computer is allowed to go on the Internet. The default configuration file name is determined at compile time. conf file and replace with your desired host name. com) to number addresses (173. Or make an similar entry in /etc/hosts file. pac file on a web server ( step by step please)Thanks in advance. In this video we will revist the inventory file. I tried to provide the path of the. Other times you may accidentally download spyware from a harmful website. This begins with creating document root directories for both sites. These are various ways you can use a proxy auto-configuration (. pac or wpad file is to utilize the Rule Engine. A proxy server may reside on the user's local computer, or at various points between the user's computer and destination servers on the Internet. By default, the proxy is configured to proxy for port 80 request. function FindProxyForURL(url, host) { // If URL has no dots in host name, send traffic direct. This registry key will force the browser to fetch the file and apply the new settings. Or sign in with one of these services. js, Apache and an nginx reverse-proxy with Docker. How do I auto-configuring proxy settings with a PAC file to hide one domain and connect everything else directly? How do I specify a URL in a PAC file to bypass proxy server? How do I create exceptions using a PAC. PAC files are Proxy Automatic Configuration files, which define a proxy for a specific URL. The parsing is done using good old eval() on the client side, which. Resolution To resolve this issue, host the PAC file on a web server, then refer to it by using the http protocol. This may be the result of an incorrect PAC file: make sure a prox= y is specified for all the hosts. A lesser known but more powerful method is through a Proxy Automatic Configuration (PAC) file - a feature of all modern browsers. I hope this helps. Re: /etc/hosts in avamar vmware proxy Hi, I have save issue and some time, I found that /etc/hosts file is back to original one with the older rename in. Background PAC files are used to configure multiple proxy servers that handle client traffic and to load- balance the proxy traffic based of the volume of traffic on a subnet. com” resolves to your proxy’s IP, and then access the proxy by going directly to example. Store the resultant file in the document root directory of a handy web server as wpad. com the computer will not perform a DNS lookup for google. Fiddler is a free web debugging tool which logs all HTTP(S) traffic between your computer and the Internet. If I use proxy server URL and port (the same as given by pac file) both services work fine. Web Proxy Auto Discovery (WPAD) Posted on 4/17/2005 by Marc. Before you can configure a system as a reverse channel proxy (RCP), you must install the HPE Operations Agent software on the system and add the system as a monitored node to OMi. If the host file maps websitea. Indeed, the file "1. The PAC file. pac file for the clients to use to obtain web proxy client configuration information. After doing this, Safari was able to use the local pac file again. It looks like we are not able to recreate the proxy/pac setup which you are having. It is not possible for us to verify the contents being downloaded by our users. (host resolving) should occur on proxy,. Background PAC files are used to configure multiple proxy servers that handle client traffic and to load- balance the proxy traffic based of the volume of traffic on a subnet. Weblock creates, manages and hosts your personalised PAC file. The script will return a proxy name to use for this server/URL, or DIRECT if there is no proxy for this host or protocol. The return value for this function says whether to use a proxy for this URL, a SOCKS proxy, or connect directly. I encountered quite a few difficulties getting the pac file to take effect, so I decided to do some analysis to work out what the requirements were to get…. Apache : Reverse Proxy Configuration A reverse proxy can act as a gateway service allowing access to servers on your trusted network from an external network. When I add the internal IP to the hosts file of the storefront server to the FQDN so it resolves to the internal IP and do an iisreset now suddenly everything starts working and I can logon. pac script or if all you want is different settings for different users that you should be able to configure that on your proxy server (i. net (IP blocks, compromised hosts, Malvertisers) and dshield. dev zone for everything. 1:1234, this tool use a pac file to decide whether to redirect to proxy or connect directly. Enable Apache as a Proxy For OWA. DAT in this case - you can call it anything you want, but using a name like "proxy. PAC File Deployment. By default, the proxy is configured to proxy for port 80 request. Consult your network administrator about these changes or if you did not make the changes yourself, navigate to C:\Windows\System32\Drivers\etc and delete the hosts file. Your home network—and everything connected to it—is like a vault. Step 3: The folder should contain either an index. com” resolves to your proxy’s IP, and then access the proxy by going directly to example. If the setting is Proxy server Open up an internet explorer and click on the following steps in the menu bar. Not able to bypass proxy using pac file Hi all. Valid file extensions include ‘. It is HostServer that should be left running as it provides the benefits as it is a browser speedup proxy and can be set to auto start in Preferences and have Enable log and Log referrer enabled to see the HOSTS file's effectiveness. This pac file can be specified by starting Chrome with the --proxy-pac-url= command line argument, or through the settings dialog. PAC file only contains the hard coded dnsDomainIs(host, "office365. Viewing Configuration Files You can view the default configuration file, but you cannot edit or delete it. We will create a PAC file to tell the system (or browser if you want proxy settings to be effective only in browsers) how to configure our proxy settings. The second NIC is directly connected to a second computer working as a Web Server (a server as Apache listening at port 80 is assumed to be installed and working in this computer). 1, and 10 using the following method. WPAD — WPAD (Web Proxy Automatic Detection) is the automatic and transparent configuration of client’s to use and send their web-traffic to a proxy server. You can check that the thick client traffic is proxying via Burp in the Proxy tab. Proxy auto-config file on server works in Chrome but doesn`t work in IE11 Hi, thanks for the reply! Currently Microsoft Edge don`t work as well, only Chrome can recognize my library proxy. If the download is needed internally and you must use a PAC file you may wish to look at using WPAD. There are three ways to deploy a PAC file: • Local PAC: in some cases it may be appropriate to host the file on the local machine, this can be useful if the machine is likely to leave the network and doesn't have Anywhere+ installed. If connecting directly to a host in your UCP cluster, you would need to connect over the published Interlock Proxy ports (8080 and 8443 by default). PAC File Deployment. For instance, you can use IP numbers in a PAC. pac file but NeoLoad is not using it. This means you can have a PAC (Proxy Access Control) file limiting browser access to web pages on (for example) Internet Explorer, but not for Firefox. dat) Did you ever wondered what is this "automatically detect settings" option in LAN settings under connection tab in Internet Explorer? By setting this option you enable the web proxy auto discovery (WPAD) protocol functionality of the web browser. SOCKS connections can also be proxied, with a custom PAC file. However, keep in mind that absolute URLs within the returned document or HTTP redirects will NOT be rewritten. Listen below:. When trying to use wpad, the request for the file, is being done by the browser on port 80. The ProxySG will serve PAC file "B" for incoming requests, to the same URL (/proxy_pac) from clients on the 10. And the wpad must be served from a webserver on port 80. Setting up Proxy. PAC files include the FindProxyForURL(url, host) JavaScript function that returns a string with one or more access method specifications. No part of this documentation and the related software and Hosts Driver File. mod_proxy and related modules implement a proxy/gateway for Apache HTTP Server, supporting a number of popular protocols as well as several different load balancing algorithms. This page includes a PAC file example which has been proven to be flexible, easy to update, while still providing accurate results. Proxy: script with proxy. In that section type in where you placed the PAC file. By adding entries to the Windows hosts file, you can block access to specific unwanted or known malware-infested websites. What the heck is a pacfile? Well it's a. Red Dead Redemption 2's PC exclusive content and enhancements get detailed so do it the proper way and use a proxy. bat] file from a command line with the following parameters:-E [proxy scheme to use - optional - for non-http]-H. Using Proxy. pac" (or whatever, as long as the extension is. Step 4: Launching proxy will automatically update and launch the script. Work with Web Proxies. pac script or if all you want is different settings for different users that you should be able to configure that on your proxy server (i. But this way Internet Explorer will ignore it. pac", modified my network preferences to reflect the pac file's new home, and restarted Safari. The commands use proxy. Proxying Web Traffic Using a PAC File Last updated on 2019-04-25 10:50:50 Whether connecting your Barracuda Web Security Gateway Inline or in Forward Proxy configuration, you might want to use a Proxy Auto-Configuration (PAC) file to distribute a set of rules for where to route/proxy web traffic from client browsers to the Barracuda Web. If we uncheck the PAC URL and set explicit proxy settings, the Creative Cloud updater/downloader works fine. Instead of having separate proxy settings in Group Policy for several web browsers (Google Chrome, Internet Explorer and FrontMotion Firefox), I decided that it would be better to create a proxy. pac files (nor JavaScript), in fact I use a simple pre-written. In addition, the proxy server(s) will use their local host file to resolve to the internal ADFS farm using the same name. (b) Hosts file hijacks The hosts file is a special file located in %windir% \System32\drivers\etc that can be used to store IP addresses that you want to associate with certain domains. That file should contain at least one nameserver line. I verified that: ISINNET inside PAC cause this hang. The = PAC file was downloaded successfully, but no proxy was found for t= his host. This example PAC file illustrates how to: Normalize the requested URL for pattern matching Bypass the proxy when the destination is a plain hostname (a hostname that does not include a domain). Otherwise, if both are run as the same user, the agent can access the server configuration file and any Admin level user in Zabbix can quite easily retrieve, for example, the database password. com to blacklisted domains and comparing its output to another "get my ip" site. Forward proxy with a PAC file - posted in Barracuda Web Security Gateway: I'm deploying my cuda as a forward proxy. $ mkdir ~/my_dir $ cd ~/my_dir $ openssl genrsa > privkey. Note the file name is different to the defacto standard of proxy. d directories are automatically loaded. mod_proxy and related modules implement a proxy/gateway for Apache HTTP Server, supporting a number of popular protocols as well as several different load balancing algorithms. Hosting the PAC file on a web server for client to access. pac files (nor JavaScript), in fact I use a simple pre-written. You can setup a host on your network to host a proxy autoconfig (. If the setting is Proxy server Open up an internet explorer and click on the following steps in the menu bar. WPAD uses several methods for finding out location of the PAC script. Re: /etc/hosts in avamar vmware proxy Hi, I have save issue and some time, I found that /etc/hosts file is back to original one with the older rename in. The HOSTS file is located in c:\windows\system32\drivers\etc. This project is designed for creating pac file automatically. Enter a comma separated list of host entries to be added in /etc/hosts file. These are various ways you can use a proxy auto-configuration (. The "normal proxy hostname that one normally does in the browser" is generally used to inflict end-user PCs with javascript that specifies the destination host address for browser traffic of varying types. The file is maintained by the network administrator and does not have to be updated by the user (hence it is "automatic"). So you will need to configure the WSA not to proxy for port 80. The reason why I ask is because I want to build an external application that automatically changes Firefox proxy. Free Mp3 Decoy Proxy Download , Lyric Decoy Proxy Chord Guitar , Free Ringtone Decoy Proxy Download , and Get Decoy Proxy Hiqh Qualtiy audio from Amazon , Spotify , Deezer , Itunes , Google Play , Youtube , Soundcloud and More. When used together, these files act like a wall, blocking where your computer is allowed to go on the Internet. Well, in any case, whitelisting is much more efficient than blacklisting, in my opinion. x goes outside the Proxy-Server (Proxy-Pac-Entrys are OK, they work since years and with other Browsers) When we try to open a Website before the VPN is connected, the URL/IP cannot be resolved by the Client (normal, because of empty Hosts-file). In general, editing the Hosts file is a bad solution. There are four steps to manage a roaming device to Dome. I've gotten it to work with Chrome so I can surf the web, but apt-get and update do not wo. Choose Authenticate, then Replace when asked what to do with the unmodified file, and enter your administrator password. Using Nano. Issue --> My requirement is to pick the files from SFTP target server, so i have created a proxy service with SFTP as transport and provided the location in my proxy service. Use a Web proxy server. Step 1: Navigate to tera-proxy/mods. Everything except approved domains/IP addresses are blocked. Biden had joined other Democrats in swearing off such groups, but he. pac look like? Do you have access to modify it? I have a proxy autoconfig in my network. Through a combination of misrepresentation, false marketing, as well as a service that purports its. The PAC file shown below currently resolves localhost, like the host file it maps localhost to IP address 127. The exact location of the Hosts file depends on the client operating system. You write in detection and if the computer isn't on your local network then you return 'DIRECT'. ===== CONFIG. So It is reading the hosts file and pinging there but not browsing there. Proxy bypass rules for private IP networks, internal hostnames, and hosts with. The PAC file was downloaded successfully, but no proxy was found for this host. I am not an expert in. How to Block Facebook #Hosts File #How To #Tutorial. "Great Scott!" - Dr Emmett Brown I recently decided to go back to using a proxy auto-configuration script (proxy pac file) on my Windows 8. A Hosts file is a plain text file, and is conventionally named – you guessed it – “Hosts. Example machine based IP routing rule. You can create variables to hold almost any value - A client's IP address, a proxy server address, a true/false value, etc. If Nginx is unable to fulfill the request, then the file request is passed to the proxy. ip_local_port_range option. While the other rules in this example may be optional, most deployments should begin with this code block (lines 3-10). The PAC file shown below currently resolves localhost, like the host file it maps localhost to IP address 127. This may be the result of an incorrect PAC file: make sure a proxy is specified for all the hosts. com” resolves to your proxy’s IP, and then access the proxy by going directly to example. Was wondering if I am doing this wrong and if I need to put "return Proxy 127. Setting up the PAC file on Forticache? Basically everything is working properly. Not able to bypass proxy using pac file Hi all. This example PAC file is used as proxy selector. EX: file://C:\Program Files\Blackhole Proxy\PAC\no-ads. js or module. ELAU PAC DRIVER - They stimulate competition for your business on the basis of performance and innovation. While supported in IE10, file-based PAC scripts never worked for the WinHTTP stack and the WinINET stack now shares proxy-determination logic with WinHTTP. 11 Administration Guide > Chapter 17 Using the Client Autoconfiguration File > Creating Autoconfiguration Files Manually > JavaScript Functions and Environment > isInNet()(host, pattern, mask). Many networks do this because the proxy server acts as a safety buffer for web traffic. Setup proxy manually the first time (since the device is not enrolled). Since I'm a Windows n00b I spent some time figuring this out for myself. A proxy auto-config (PAC) file defines how web browsers can choose a proxy server for receiving HTTP content. The default hosts file is quite simple. A proxy auto-config (PAC) file is a text file that defines a JavaScript function: FindProxyForURL(url, host). pac" file rather than my university`s "proxy. Once you’ve written a proxy auto-config file using the techniques above, you can either put it somewhere on your local disk and simply point the browser to it, or host it remotely on a server you have access to. How do I auto-configuring proxy settings with a PAC file to hide one domain and connect everything else directly? How do I specify a URL in a PAC file to bypass proxy server? How do I create exceptions using a PAC. If you're still able to access the website, either copy from the browser and paste it into your hosts file. 0 Federation Proxy Server Proxy Configuration Wizard. pac or wpad file is to utilize the Rule Engine. It can also be used as a way to direct website traffic to a specific IP address or server, allowing you to test your websites on your new Webair server before making it live. In general, editing the Hosts file is a bad solution. 24 November 2008 I have recently enrolled on a Computer Science course at The University of Nottingham, and as such have had to make sure my machines correctly use their proxy server for web access. This may be the result of an incorrect PAC file: make sure a prox= y is specified for all the hosts. pac route and you're implementing a node. A Hosts file is a plain text file, and is conventionally named – you guessed it – “Hosts. Apache : Reverse Proxy Configuration A reverse proxy can act as a gateway service allowing access to servers on your trusted network from an external network. file://c:/proxy. The commands use proxy. I just want to know where (which file, i. 0 (prefix) is considered the location of your computer, so when an entry listed in the MVPS HOSTS file is requested on a page you are viewing, your computer thinks 0. If the PAC file encoding is UTF-8 with BOM, it will not work. In this post today, we will be exploring how to block all websites except approved ones on Windows 10 PCs. To make Internet Explorer use this configuration I have to specify the pac-file in the LAN settings in the following way: file://C:/proxy. In this video we will revist the inventory file. This variable can be read and reset at any point in the PAC file. Web Proxy Auto Discovery (WPAD) Posted on 4/17/2005 by Marc. The webmail server has two NICs, one with private ip 131. com do resovle to specific ip address 1. Temporarily give the computer access to the entire Internet (like when running updates, or looking up more websites/IP addresses) by adding dns back into the nsswitch. com on any port (only applicable for manual proxy). 1 and a client can connect to it by using the IP directly then the proxy is not blocking it. Windows 10 still retains the old computing standard of having a hosts file for. You may want too use mod_security for example. dat files automatically. 7 and one with public ip 200. This project is designed for creating pac file automatically. Hiproxy support two proxy methods: PAC(Proxy-Auto-Config) and general proxy. conf for more information. 11 skylight 192. 1 domain dev". Auto Configuring Proxy Settings (Proxy Autodiscovery wpad. pac", modified network preferences to reflect the pac file's new home, and restarted Safari. pac file but NeoLoad is not using it. When you go to a web address in your browser, your request goes to the proxy server, which downloads the page, then sends it to your computer. Ask Question Asked 6 years, 2 months ago. Default: 180 PAC responder configuration options The PAC responder works together with the authorization data plugin for MIT Kerberos sssd_pac_plugin. EX: file://C:\Program Files\Blackhole Proxy\PAC\no-ads. Back to Active Directory. Behind your login lies tons of valuable information, from unencrypted files containing personal data to devices that can be. Most organizations will want to bypass their proxy server for local web servers (intranet, CMS, helpdesk, etc). hosts file 127. I've configured the guest OS with the autoconfiguration scri. Microsoft and Cisco's Talos researchers have identified a new malware strain, Nodersok (or Divergent), that uses web apps to turn. Web resources about - PROXY. 1' - the proxy is not used. DESCRIPTION The SMTP server accepts network connection requests and performs zero or more SMTP transactions per connection. The host file essentially does what DNS does i. com on any port (only applicable for manual proxy). - When '-Product' flag is omitted, Script outputs that PAC will be generated for All products, but actual. When you’re done testing, remove that one line from the hosts file and save and close to return everything back to normal. How many seconds to keep a host in the managed known_hosts file after its host keys were requested. Hi, Sorry for the inconvenience caused to you, Thank you so much for your valuable question please, I would suggest you to please see the below mentioned article and see solution given by Steven K. -KNOWNHOSTS_FILE= No: The full path to the Known_Hosts file on the local machine. conf for more information. To edit a PAC file: On the Settings page open the Web Security tab. What does your network's proxy. 0 subnet, that client will be served PAC file "A". Your organization or proxy provider will provide you with the address of the setup script, if you need one. For each request, the client executes the javascript, passing along the URL and host name it would like to make the request to. click the blue button where at the bottom of the scree , then select the hosts file which you make or get from Internet. What client settings are supported? Automatic Proxy Detection Automatic Proxy Configuration (PAC file) Manual setting: Select Web Proxy (HTTP) and Secure Web Proxy (HTTPS) and enter the IP address or host name for your proxy server 2. Biden had joined other Democrats in swearing off such groups, but he. This may be the result of an incorrect PAC file: make sure a prox= y is specified for all the hosts. Sign in with Facebook. Or sign in with one of these services. I decided to change my hosts file (c:\windows\system32\drivers\etc\hosts) to spoof the host url that you were using for the zips to point to my machine and set up the downloaded zip and manifest files on the web server on my machine so the install would download them from my machine and bypass the network virus scan. The content of Web Proxy Autodiscovery Protocol files (wpad. 1 A proxy server is a server that you can route your Web browser through, which fetches the content first then passes to you, in order to increase speed. I just want to know where (which file, i. [Tools] - [Internet Option] - [Connection] -[LAN Settings] If there is a check on the Proxy server, please uncheck it. The solution presented in the article uses the WinHttp. How to redirect from a proxy configuration script (. So you will need to configure the WSA not to proxy for port 80. Each domain-name you host must first be registered and an "A" record created on a DNS server. This PAC file checks to see if the host which is being looked up is a plain host name, i. 1 and a client can connect to it by using the IP directly then the proxy is not blocking it. King of the PAC. Why Is This Better Than A Hosts File? Some people use an /etc/hosts (or on Windows, hosts. // tunnel traffic through server. The idea behind pacparser is to make it easy to add this PAC file parsing capability to any program (C and Python supported right now). This type. The sample provided above is more than adequate to get you going. PAC File Deployment. laptop users at home. 7 and one with public ip 200. The commands use proxy. pac file for automatic proxy network configurations and Privoxy proxy servers. Since any Windows system that has Windows Defender or Microsoft Security Essentials cannot use hosts file blocking safely, implementing a bulk hosts file-like blocking in the OpenDNS interface would be ideal, rather than just the 1-by-1 blocking currently implemented. Set up Automatic Virtual Hosts with Nginx and Apache When starting new applications, a developer often needs to set up a new virtual host. A pac file is like a script that can contain several proxy configurations depending on the network and your IP location so if you do not know the exact proxy host/port to pick, you can contact your system administrator who should be able to help you find the right one. The PAC file. Also, the setup is a bit of a pain. 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. local in lieu of. An enterprise with multiple proxies and internal networks could use the URL and HOST parameters to do a more complex proxy configuration. Authentication with LDAP or Kerberos.