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title: Fetching Correct IP Address And Host keywords: [“Apache ShenYu”] description: Fetching correct IP address and host

Description

• This doc demonstrates how to get correct IP address and host when Apache ShenYu serves behind nginx reverse proxy.
• After fetched real IP and host, you can match them with plugins and selectors.

Default Implementation

• The embedded implementation in Apache ShenYu is :org.apache.shenyu.web.forward.ForwardedRemoteAddressResolver.

• You need to config X-Forwarded-For in nginx first to get correct IP address and host.

Implement through a Plugin

• Declare a new class named CustomRemoteAddressResolver and implements org.apache.shenyu.plugin.api.RemoteAddressResolver.

public interface RemoteAddressResolver {

    /**
     * Resolve inet socket address.
     *
     * @param exchange the exchange
     * @return the inet socket address
     */
    default InetSocketAddress resolve(ServerWebExchange exchange) {
        return exchange.getRequest().getRemoteAddress();
    }

}

• Register defined class as a Spring Bean.

   @Bean
   public SignService customRemoteAddressResolver() {
         return new CustomRemoteAddressResolver();
   }