How "safe" is my webspace on PlusNet? What security measures are in place to stop other people from using my space? I have a mate who reckons he can get easy access to my site and that there is no real security in place.
Are you talking about your www webspace or cgi webspace.
www is pretty secure and you need your username & pasword to access it.
CGI is by it's natre insecure due to it having shell access and being able to run scripts manually or via the webserver. You can protect your files to a degree using the correct permissions. See CGI: UNIX file permissions for more details on doing this.