mTLS: Mutual TLS Between Services Without a Service Mesh

Thu, 11 Dec 2025 16:00:00 +0000

Ordinary TLS proves the server’s identity to the client. The browser checks the certificate, sees a name it trusts, and gets on with the conversation. The server, meanwhile, has no idea who the client is — it’ll talk to anyone. For service-to-service traffic inside your own infrastructure that’s backwards. You frequently care far more about which client is calling than the client cares about the server. Mutual TLS fixes that: both ends present certificates, both ends verify, and an unauthenticated caller never gets past the handshake.

Mtls - Tag - vo.rs

mTLS: Mutual TLS Between Services Without a Service Mesh