Just log in to your server and run:
apt-get update && apt-get upgrade
Then restart nginx (or your webserver). Yes, this is must.
service nginx restart
Mitesh Shah from our team found that unless you restart web-server, heartbleed bug is continue to show up! I am yet to find out why server restart is needed.
You can test if your SSL is vulnerable using – http://filippo.io/Heartbleed/
If your test doesn’t work, let us know.
If will be good if you rotate, re-issue or re-setup your SSL certificate. Above solution will prevent any further attack. But if your site has been already compromised, then it’s better to generate new private key, car and certificate.
If you are not on Ubuntu, you can just install OS updates and most likely the issue will be fixed.
If your servers are using rtCamp’s managed-hosting, you no need to bother about this. Your servers are secured. You can verify it using above test!