The Apache Tomcat Native Library 2.0 - Miscellaneous Documentation -

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### Introduction

Historically there have been security issues associated with TLS renegotiation. This page describes the renegotiation behaviour of the Tomcat Native library.

### Client initiated renegotiation

Client initiated renegotiation is disabled. This behaviour is hard-coded and cannot be changed.

### Unsafe legacy negotiation

Support for unsafe legacy negotiation depends on OpenSSL. Unsafe legacy renegotiation is disabled by default and will not be allowed unless the OpenSSL configuration option `SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION` is set.