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The general format of the field is: [2] X-Forwarded-For: client, proxy1, proxy2 where the value is a comma+space separated list of IP addresses, the left-most being the original client, and each successive proxy that passed the request adding the IP address where it received the request from.
pkg-config is a software development tool that queries information about libraries from a local, file-based database for the purpose of building a codebase that depends on them. It allows for sharing a codebase in a cross-platform way by using host-specific library information that is stored outside of yet referenced by the codebase.
HAProxy is a free and open source software that provides a high availability load balancer and Proxy (forward proxy, [2] reverse proxy) for TCP and HTTP-based applications that spreads requests across multiple servers. [3] It is written in C [4] and has a reputation for being fast and efficient (in terms of processor and memory usage). [5]
pip (also known by Python 3's alias pip3) is a package-management system written in Python and is used to install and manage software packages. [4] The Python Software Foundation recommends using pip for installing Python applications and its dependencies during deployment. [5]
This configuration management system stores all configuration (state) data inside an easily understood data structure that leverages YAML. While experimental functionality of the Salt State system was available in May 2011, it was not considered stable until the release of Salt 0.9.3 in November 2011.
Many modern frameworks use a convention over configuration approach. The concept is older, however, dating back to the concept of a default, and can be spotted more recently in the roots of Java libraries. For example, the JavaBeans specification relies on it heavily. To quote the JavaBeans specification 1.01: [2]
Alternatively, you need to disable caching of proxy auto-configuration results by editing the registry. [7] It is recommended to always use IP addresses instead of host domain names in the isInNet function for compatibility with other Windows components which make use of the Internet Explorer PAC configuration, such as .NET 2.0 Framework. For ...
Example scenario: A client on the Internet (cloud on the left) makes a request to a reverse proxy server (red oval in the middle). The proxy inspects the request, determines that it is valid and that it does not have the requested resource in its own cache. It then forwards the request to some internal web server (oval on the right). The ...