Stunnel is a free SSL proxy server that provides SSL services to Windows programs. Stunnel is easy to install, very robust, and functions transparently with very little overhead.
Stunnel is required by SEE application programs when connecting to an email server that requires SSL services such as Gmail, Hotmail, and Yahoo.
If you are using SEE version 7.0 (or above), once downloaded & unzipped, Stunnel can be configured and controlled automatically without any user intervention.
1. Download Stunnel from https://www.stunnel.org/downloads.html
or https://www.marshallsoft.com/stunnel-win32.zip
or https://www.marshallsoft.com/stunnel-win64.zip
or FTP file stunnel-win32.zip from ftp.drivehq.com/MarshallSoft/PublicFolder/
or FTP file stunnel-win64.zip from ftp.drivehq.com/MarshallSoft/PublicFolder/
to a temporary directory, as for example c:\temp\
2. Start a command window then CD to where Stunnel was downloaded.
3. Unzip Stunnel (stunnel-win32.zip or stunnel-win64.zip if downloaded from MarshallSoft)
4. Run the installer program stunnel-*-installer.exe
5. Click "I Agree" when the Stunnel Setup License Agreement is displayed
6. Choose "Install for anyone using this computer" then click "Next".
7. Enter "C:\Stunnel32" or "C:\Stunnel64" when the "Choose Install Location" window is displayed, then click "Install"
8. Answer the questions required to create your stunnel.pem certificate file.
8.1 Enter "Country Name", for example "US"
8.2 Enter "State or Province", for example "Alabama"
8.3 Enter "Locality Name", for example "Huntsville"
8.4 Enter "Organization Name", for example your company name.
8.5 Enter "Organizational Unit Name", for example "Development"
8.6 Enter "Common Name" (YOUR fully qualified domain name [FQDN]), for example localhost or http://www.abc-widgets-inc.com
8.7 Click "Finish" when "Completing Stunnel Setup" is displayed.
9. Copy all files from \stunnel\bin\ and \stunnel\config\ to your SEE SSL directory, as for example \SEE4C\SSL\ (or SEE4VB, SEE4XB, etc)
You can examine the contents of your stunnel.pem certificate file by pasting the lines starting with
"-----BEGIN CERTIFICATE-----" through "-----END CERTIFICATE-----"
into https://www.sslshopper.com/certificate-decoder.html