The certificate presented matches the private key being used by the remote end.A client will accept this certificate only if: This certificate is signed by a 'Certificate Authority' (hereafter a CA) - usually a trusted third party like Verisign. When an SSL client connects to an SSL server, the server presents a certificate, essentially an electronic piece of proof that machine is who it claims to be. It is possible to have your key signed by a third party (Certificate Authority) instead if you wish. On Unix stunnel generates a self-signed certificates by default during the installation. PEM stands for 'privacy enhanced mail' which is now much more liberally used as a key format.Īn SSL server should also present a certificate. This is contained in the pem file which stunnel uses to initialize its identity. Quick certificate overviewĮvery stunnel server has a private key. Here I will try to explain how certs work with stunnel itself. For that, go read the SSL Certificates HOWTO. AuthenticationĪ full description of how certificates work is beyond the scope of this FAQ. To install stunnel as a service execute: stunnel -install Stunnel can run as a native service under Windows. Running stunnel as a service under windows Stunnel accepts the following signals, all of which tell it to log the signal and terminate: TERM, QUIT, INT. If stunnel is running in daemon mode, you can stop it simply by killing it. Service name is the name of service that was put in square brackets in nf. You must put entries in /etc/hosts.allow to specify which machines should be allowed access to stunnel. The configure program should be able to determine if the libwrap library ( -lwrap) and headers are available in standard locations. You can can compile in support for TCP wrappers when you compile stunnel itself. ![]() You do not need to use the tcpd binary to wrap stunnel (although you could). Stunnel configuration file needs at least the section name and accept option. Lets say we want to have stunnel listen on our machine on port 9999 to support a fictitious protocol called foobar.įirst we would add the following line to /etc/services: foobar 9999/tcp # The foobar service Daemon mode will not fork if you have stunnel compiled with threads.
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