If you are using DreamHost, we recommend a few options to increase the security of your sites in their environment:
It adds a few security restrictions per site/accounts to minimize the chances of attacks from other users in the same shared server.
- Configure a different user account per site
There is also an option to create/isolate each site on different user accounts. We highly recommend it to minimize cross site reinfections.
Website Cross-site Contamination?
Learn more about the threats with cross-contamination by reading some of our recent posts: A Little Tale About Website Cross-Contamination and Website Cross-contamination: Blackhat SEO Spam Malware