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Frequently Asked Questions

The Relationship Between Rules, Proxies, and Policy Groups in Egern​

1. Rules Determine Policies​

  • Rules are conditions used to match network requests. When a network request is made, Egern will match them sequentially according to the rules.
  • Each rule specifies a policy, which can be a proxy name, policy group name, or DIRECT and REJECT.

2. Policies​

  • A policy can be a single proxy or a policy group.
  • Once a rule is matched, if the policy is a proxy name, the traffic will be forwarded through the specified proxy server.
  • If the policy is a policy group name, Egern will select an appropriate proxy server based on the type and configuration of the policy group.

3. Sub-policies of Policy Groups​

  • A policy group can contain multiple proxies or other policy groups, forming a hierarchical structure.
  • For example, the policy group Manual Selection may include VmessProxy and ShadowsocksProxy, allowing users to manually choose which proxy to use.
  • In nested policy groups, the policy matched by a rule may need to go through several layers of policy groups before determining the final proxy server.

4. Traffic Handling Process​

  1. Request Initiation: A user's network request needs to be processed.
  2. Rule Matching: Egern matches the configured rules from top to bottom and finds the first rule that meets the condition.
  3. Policy Determination: Based on the policy of the matched rule, the appropriate policy is determined.
  4. Policy Parsing:
    • If the policy is DIRECT, the connection is made directly without using a proxy.
    • If the policy is REJECT, the connection is blocked.
    • If the policy is a proxy name, that proxy server is used.
    • If the policy is a policy group, the appropriate proxy server is selected according to the policy group's type and configuration.
  5. Request Forwarding: The network request is processed and forwarded through the determined proxy server.

How to Add a Rule Set​

Egern currently supports Surge rule sets. Go to Tools -> Rules -> + -> Select the rule-set type, then add the Surge rule set URL.

How to Add a Module​

Egern currently supports Surge modules. You can add a Surge module URL under Tools -> Modules.