Downloads page for stunnel: a multiplatform GNU/GPL-licensed proxy encrypting arbitrary TCP connections with SSL/TLS.

Stunnel package¶. The stunnel program is designed to work as an SSL encryption wrapper between remote client and local (inetd-startable) or remote servers. It can be used to add SSL functionality to commonly used inetd daemons like POP2, POP3, and IMAP servers without any changes in the program’s code. That’s it! You should be able to send mail to anyone now. Stunnel is a great tool. It just listens on port 25. When it hears something, it adds the appropriate data around your un-encrypted email and sends it on to the mail server and port you specified in the conf file. Clients connecting to stunnel running in client mode can establish a plain text connection and stunnel will create an SSL tunnel to a server. Server Mode. To run stunnel in server mode, you will need to create a certificate. Create a new text file named stunnel.cnf copy the following into this file and save it in the folder Stunnel-4.05 # create RSA certs - Server RANDFILE = stunnel.rnd [ req ] default_bits = 1024 encrypt_key = yes distinguished_name = req_dn x509_extensions = cert_type [ req_dn ] countryName = Country Name (2 letter code) countryName_default = PL Nov 11, 2015 · I hope that helps. This is for a home server, and I’m wrapping several services through port 443 using stunnel to and sslh to direct the connections to the appropriate server (this means the logs have to be reconstructed to identify the real source, but it works well for my needs). Just about every system administrator comes across a time when there is a need to encrypt some service. Perhaps your mail program just can't handle it. Or maybe you need to take a non-SSL aware VNC server and make it SSL-aware. Maybe you're just paranoid. For such moments in system administrating there is "stunnel." I have a TCP Server/Client where the Server listens on port 5000 and the Client outgoing port is 39000. I have Stunnel set up on the Server: [custom] accept = 6000 connect = 5000 so it accepts connections on port 6000 and redirects it to 5000 (which my Server.c is listening on). I tried to set up STunnel on the Client in the following way:

Nov 11, 2015 · I hope that helps. This is for a home server, and I’m wrapping several services through port 443 using stunnel to and sslh to direct the connections to the appropriate server (this means the logs have to be reconstructed to identify the real source, but it works well for my needs).

Oct 21, 2013 · The Stunnel program is designed to work as an SSL encryption wrapper between remote client and local (inetd-startable) or remote server. It can be used to add SSL functionality to commonly used inetd daemons like POP2, POP3, and IMAP servers without a Dec 19, 2019 · Step 4: Install Stunnel, for all users, once installed you should see a shortcut on your desktop “stunnel AllUsers, click on it. This will start the GUI. Right click the icon and select Edit Configuration; Under the TLS Server Mode Services add the following, then save and exit. Right click the icon and select Show Log Window Mar 29, 2019 · A single stunnel instance could be used to provide both client and server functionalities for different services at the same time. How cool is that? The rest of this article assumes we are using a single stunnel.conf file.

Stunnel is a proxy designed to add TLS encryption functionality to existing clients and servers without any changes in the programs' code. Its architecture is optimized for security, portability, and scalability (including load-balancing), making it suitable for large deployments.

This just means, that Stunnel will be used to accept the client requests and establish an encrypted (HTTPS) connection, while Stunnel and the HFS server are exchanging non-encrypted data (HTTP). A typical configuration of a PC with an https-enabled HFS server: - Stunnel accepts requests from any IP on port 443, the HTTPS default port. The e-mail client will connect with your local Stunnel daemon, the Stunnel daemon will make an SSL connection to the remote Stunnel server (stunnel.example.com) and the Stunnel server will make a non-SSL connection to the original IMAP and SMTP servers.