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Mutual TLS (mTLS) strengthens security by forcing both client and server to present valid X.509 certificates during the TLS handshake. This guide shows how to generate server-side and client-side Java KeyStores (JKS) make the two parties trust each other wire everything into Spring Integration, and reject connections whose certificate CN is not the expected value 1. Generate keys and certificates with keytool 1 . 1 Create the server keystore keytool -genkeypair \ -alias server \ -keyalg RSA \ -keysize 2048 \ -validity 365 \ -keystore server.jks \ -storepass passwordLocal \ -dname "CN=server.example.com,OU=Dev,O=Example,L=City,S=State,C=US" 1 . 2 Create the client keystore keytool -genkeypair \ -alias client \ -keyalg RSA \ -keysize 2048 \ -validity 365 \ -keystore client.jks \ -storepass passwordLocal \ -dname "CN=client.example.com,OU=Dev,O=Example,L=City,S=State,C=US" 1 . 3 Export and exchange the certificates Export the server certificate and import it into the client trust store: ...

Sending Data to External Systems Using TCP with Spring Integration Data can be sent to external systems using various protocols such as HTTP, HTTP/2, and WebSockets. For minimal overhead, TCP communication is a viable alternative. Before diving into TCP with Spring Integration, let’s first explore basic TCP communication using Netcat. Setting Up a TCP Listener with Netcat To create a TCP server that listens for incoming connections, open your terminal and execute the following command: ...