Apache's mod_rewrite provides methods to map values to attributes using the directive RewriteMap. One not so well known feature of mod_rewrite is to extend this functionality with internal functions, which can be defined in a seperate Apache module. mod_icpquery is an Apache-2.0/2.2 compatible module that extends mod_rewrite by internal RewriteMap functions. It sends out a request as a UDP query to a list of Unicast or multicast addresses. This query conforms to RFC 2186, also known as ICP, and can be handled by various HTTP-caching servers such as squid. A cache-server handling ICP should reply to an ICP query with an ICP response indicating if it holds the desired object in its cache or not. This information can be further processed by mod_rewrite using its superb regex rules.
Pkg-cacher is a transparent caching proxy daemon optimized for Debian and RPM packages. It is based on apt-cacher (version 1.6.4), which is available with Debian. This version has been modified to understand RedHat RPM repositiories. It also adds support for the HTTP Range and HTTP Redirect headers, and deals correctly with files which have the same name but different content on different distributions or, in some cases, different versions of the same distribution.
For high traffic Web sites, Proto Balance Advanced provides connection rate limiting per second and limits the total number of connections. Both are done on a per-client basis. It has a complete Web configuration interface. The IP address of each connecting Web browser is recorded along with its connection stats. It is scalable to millions of clients and handles 10,000 concurrent connections. It performs server backend load balancing with an on-the-fly capability to add and remove servers. Daily and weekly traffic graphs are shown.
Proto Balance SSL negotiates an SSL connection and forwards the plain HTTP connection to your Web server. Certificate management like request generation, vendor certificate installation, and key generation are all done from an easy-to-use Web interface. It load balances connections over multiple Web servers. It performs 1000 SSL transaction per second. Traffic management and on-the-fly redirection of traffic. On-the-fly adding and removal of servers. Traffic accounting and client-connection-rate limits. Denial of server protection. Layer 7 inspection and X-Forwarded-For support.
Proto Balance is a load balancing and traffic management system that can handle up to 10,000 concurrent connections and 20,000 downloads per second. Proto Balance is a load balancer and TCP traffic port forwarder for high availability. It features an easy-to-use Web interface that requires minimal knowledge of networking and no command-line experience. Its target audience includes enterprise cluster providers, Internet service providers, and network administrators.
Das Schaefchen is a lightweight HTTP server and proxy for Unix platforms. It supports the minimum requirements of the HTTP/1.1 protocol and virtual hosts, basic authentication (which can be used to protect either files or directories), directory listing, byte ranges, reverse proxy, and FastCGI. It is an event-driven server that runs as a single process with a single thread using non-blocking I/O. It uses epoll as the event notification mechanism to multiplex control between active connections.
AppSamurai is a mod_perl based system to protect vulnerable or sensitive Web applications. The target use is in reverse proxy configurations, with an Apache/mod_perl reverse proxy inside a DMZ and a backend Web server in another DMZ or an internal network. AppSamurai's features include a modular, multi-factor authentication system, form based or basic auth based logins, encrypted storage of session data on a proxy, the ability to use any Apache::Session storage type (including databases for clustered deployment), and the ability to configure it from httpd.conf.
PhishBouncer is an anti-phishing platform based on an HTTP/HTTPS proxy integrating anti-phishing checks that do not depend on block lists or Phish signatures. The checking algorithms make use of the attributes of the Web site being visited, the structure and properties of the referring URL, and the Web site's association with other legitimate Web sites that the user interacts with. The checks are implemented as plug-in interceptors, and it is easy to modify them and add or remove new checks.