access_rules_inherit
The 'access_rules_inherit' directive controls the inheritance of access control rules within NGINX configurations.
Description
The access_rules_inherit directive is a feature within the NGINX Advanced Access Control module that determines how access control rules are inherited from parent contexts, such as http or server blocks, to child contexts like location blocks. This allows for flexible and dynamic management of access rules based on variables. It accepts three specific values: 'off', 'before', and 'after'. When set to 'off', no previous access rules are inherited unless none are defined at the current level. Setting it to 'before' means that the parent rules will be evaluated prior to the current rules, potentially allowing or denying access depending on the defined conditions. Conversely, the 'after' setting evaluates the parent rules after the current rules, which may allow for a layering strategy of access control based on the finer specifics of the configuration.
The inheritance behavior facilitates a more modular and maintainable configuration, as it allows shared rules to be easily applied across multiple contexts without redundancy. This can be particularly useful for managing complex access control scenarios where different contexts may have overlapping but distinct rules. A clear understanding of this directive is essential for properly utilizing the advanced access control capabilities offered by this NGINX module.
Config Example
location /private {
access_rules_inherit before;
access deny $var1;
}
server {
access_rules_inherit after;
access allow all;
}Be cautious with the order of rules; using 'after' might execute parent rules too late in the evaluation process.
Ensure that the directive is set at the appropriate context level to achieve the desired behavior, as misconfiguration may lead to unexpected access results.
Not applying any rules at the current level when inheritance is 'off' can lead to unintentional access allowances.