es. This may have an impact on
<a href=/v1.10/docs/reference/config/security/peer_authentication/#PeerAuthentication-MutualTLS-Mode><code>PERMISSIVE</code></a> mTLS and <a href=/v1.10/docs/ops/configuration/traffic-management/protocol-selection/#automatic-protocol-selection>Automatic protocol selection</a>.</p><p>Both of these features work by inspecting the initial bytes of a connection to determine the protocol, which is incompatible with server first protocols.</p><p>In order to support these cases, foll