In logstash-forwarder and filebeat a certificate for TLS client authentication can be configured. However in the lumberjack server, TLS mutual authentication (aka verify_mode) cannot be configured. It defaults to not performing any peer validation.
Ruby doc:
http://ruby-doc.org/stdlib-2.0.0/libdoc/openssl/rdoc/OpenSSL/SSL/SSLContext.html#attribute-i-verify_mode
In logstash-forwarder and filebeat a certificate for TLS client authentication can be configured. However in the lumberjack server, TLS mutual authentication (aka verify_mode) cannot be configured. It defaults to not performing any peer validation.
Ruby doc:
http://ruby-doc.org/stdlib-2.0.0/libdoc/openssl/rdoc/OpenSSL/SSL/SSLContext.html#attribute-i-verify_mode