Stunnel

Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Stunnel shopping experience:

1. Compare - without doubt the biggest advantage that the Stunnel offers shoppers today is the ability to compare thousands of Stunnel at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Stunnel? Wrong! If the Stunnel is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Stunnel then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Stunnel? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Stunnel and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Stunnel wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Stunnel then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Stunnel site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Stunnel, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Stunnel, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

{{Infobox_Software|name = Stunnel |screenshot = |caption = Universal SSL Wrapper |developer = Michal Trojnara & Brian Hatch |latest_release_version = 4.20 |latest_release_date = November 30, [ |operating_system = Multi-platform |genre = [Proxy server, [Encryption |license = [GNU General Public License |website = http://stunnel.mirt.net/ stunnel.mirt.net -->

Stunnel is a free software multi-platform computer program, used to provide universal Transport Layer Security tunnelling service.

Stunnel can be used to provide secure encrypted connections for clients or servers that do not speak TLS or SSL natively. It runs on a variety of operating systems, including most Unix-like operating systems and Microsoft Windows. It relies on a separate Library (computing) such as OpenSSL or SSLeay to implement the underlying TLS or SSL protocol.

Stunnel uses Public-key cryptography with x509 Public key certificate to secure the SSL connection. Clients can optionally be authenticated via a certificate too.

If Linker against TCP Wrapper, it can be configured to act as a Proxy server-Firewall (networking) service as well.

Stunnel is maintained by Michal Trojnara and Brian Hatch. Released under the terms of the GNU General Public License.

Example Scenario The application can present an external secure SSL port that is mapped to an internal unsecured TCP and UDP port of an existing application.

For example, to provide a secure Transport Layer Security connection to an existing SMTP mail server, Stunnel might map the SSL port 465 to port 25 of the mail server. Network traffic from clients connecting to the mail server on port 465 would initially pass over SSL to the Stunnel application, which would then transparently forward unsecured traffic to port 25 of the mail server. The Stunnel process could be running on the same or a different server to the unsecured mail application, however both machines would typically be behind a firewall on a secure internal network.

External links

Official Website
Stunnel FAQ / downloads

Official Website
Stunnel FAQ / downloads