[i]Even though your DH account supports a secure socket, you can’t securely connect to your domain until you set up a secure certificate. These cost about $125 a year through an authorized certificate authority. You’d know if you had one, did you set up one already? You can verify by adding an “s” to the url, like: https://www.yourdomain.com
If nothing comes back you don’t have one. In that case, you can still connect with a shell through standard telnet.[/i]
You’re confusing SSH and SSL, which are entirely unrelated. All Dreamhost accounts support SSH; all you have to do it turn it on in the control panel. Telnet should never be used, period. It shouldn’t even be available, IMO.
SSL does require a certificate, but this has to do with securing HTTP connections (ie, HTTPS). It has nothing to do with SSH.
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