I've been using a C100 for quite a while and I love it.
We've always had some trouble with one our public IP being blacklisted in DUL.
We contacted our ISP and after months of troubleshooting they resorted to giving us another IP that doesn't have the same problem.
With our current configuration we can assign the IP to the C100 but we got to put it outside in the wan link.
Is it safe to put the C100 in front of the firewall?
All management on the C100 is done from the inside, there is no FTP, Telnet, SSH, HTTP, HTTPS enabled on the public interface.
Thanks in advance for your time.