FTP cannot reach server / FTP cannot login
SSH cannot reach server / SSH cannot login
Cannot view website
Traceroute works up to the server ip address.
Check this first:
If a client cannot get in, using correct login, and website appears to be down as well and if they ping it and the correct ip of the site shows then most likely it is firewalled somewhere. Either on their end (through symantec or something) or on the server side (automatic firewall from login failures).
Check the ip address: http://www.simplicityhosting.com/myip
Please submit a support ticket with your ip address to query whether it has been automatically firewall blocked and we will let you know and unblock it.