Filtre

Filtre is a configurable IP address filter for J2EE Web applications.

Usage

By convention, Filtre will attempt to load its configuration from filtre.properties stored on the root of the classpath:

allowList=127.0.0.1,127.0.0.3
denyList=127.0.0.2

Filtre can also be configured entirely within web.xml. This is useful when multiple instances are needed to protect different URL patterns with different allow and deny lists. Optional init parameters are allowList, denyList, and configLocation:

<filter>
    <filter-name>filtre</filter-name>
    <filter-class>com.earldouglas.filtre.Filtre</filter-class>
    <init-param>
        <param-name>allowList</param-name>
        <param-value>127.0.0.1,127.0.0.3</param-value>
   </init-param>
</filter>

<filter-mapping>
    <filter-name>filtre</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

Filtre is configured through three init-param elements:

allowList: a comma-separated list of IP addresses to be allowed access
denyList: a comma-separated list of IP addresses to be denied access
configLocation: the path of a properties file containing the allowList or denyList properties

Address format

Currently supported are IPv4 addresses in CIDR notation:

127.0.0.1
127.0.0.1/0
127.0.0.1/31
127.0.0.1/32

earldouglas/filtre

Filtre

Usage

Address format