If Stunnel was running then you will need to open the Stunnel GUI and select:Ĭonfiguration > Reload nf from the menu bar. Save the configuration and now you can start the Stunnel runtime. This configuration is not needed, you will need to remove it by highlighting the text and deleting it. Once you’ve opened the nf file in Notepad you’ll be presented with their default configuration. You can also find it from selecting: Start > All Programs > Stunnel > Edit nf. You can find the file in the directory Stunnel is installed to. Stunnel is configured with a text-based configuration file titled nf. As we mentioned in the Introduction, we have provided an example using Gmail. You can use Stunnel to configure any SSL enabled server.
If you skip this step, Stunnel will not function properly. The information creates an SSL certificate. During the installation process, make sure you enter the proper Organization information. Stunnel 5.40 can be downloaded from the Stunnel website.
Openssl req -new -x509 -nodes -out stunnel.pem -keyout stunnel.pem. There are a multiplicity of options and the design is really up to you. For example, if you want to secure SMTP, you would have it listen on another port and then forward it to port 25. Stunnel works by listening on another port and then redirecting that traffic through to the unsecured 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 () and the Stunnel server will make a non-SSL connection to the original IMAP and SMTP servers. CUPS is an example of a component that does not provide a way to disable SSL in its own. It listens on the port specified in its configuration file, encrypts the communitation with the client, and forwards the data to the original daemon listening on its usual port. The stunnel program is an encryption wrapper between a client and a server. If your WIN-911 configuration contains a large number of Email Contacts and/or Alarms, you will need to find an alternative to Gmail. Currently, the limit is 500 emails in a day. While we are using Gmail as an example, please be aware that Google enforces sending limits on Gmail accounts. We have provided an example Stunnel configuration in this article that will be using Gmail's SMTP server. 
Stunnel is required for WIN-911 V7 as it does not natively support SSL. This document will explain the procedures for installing and configuring Stunnel, a third-party SSL tunneling client to be used if your SMTP server requires SSL. Stunnel Example By efsosungte1984 Follow | Public
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