FreeTDS User Guide: A Guide to Installing, Configuring, and Running FreeTDS
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# stunnel HOWTO

Contributed by Bradley Bell.

To set up FreeTDS over stunnel between a Linux webserver and a W2k SQL server:

1. Get unencrypted freetds working

2. Install openssl and stunnel on the Linux box: stunnel.org

3. Download the stunnel binary and openssl dll's for Windows.

4. Generate stunnel.pem (complete with Diffie-Hellman parameters) for placement on the W2k box. See instructions in the stunnel FAQ.

5. Start stunnel on the W2k box:

       	$ stunnel.exe -d 61666 -r localhost:1433

   61666 is just an arbitrary port number.

6. Start stunnel on the Linux box:

       	$ stunnel -c -d 1433 -r win2kserver:61666

   where `win2kserver` is the hostname or IP address of the W2k box.

7. Set up FreeTDS to use the tunnel. If this is your unencrypted entry in `freetds.conf`:

   Example 5-9. Unencrypted entry in `freetds.conf`

       	[win2kserver]
       	host = win2kserver
       	port = 1433

   the encrypted equivalent uses:

   Example 5-10. Encrypted entry in `freetds.conf`

       	[win2kserver]
       	host = localhost
       	port = 1433

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