[blue68f100]

The older version of os is not as polished. I think you may have to take it off line with no users, then try the changes. On a lot of the earlier units you had to do some debug cmds using putty. And some commands had to be done through the com port. I was wondering if the problem lies with the DNS server retaining the old info and not the snap. I do not recall any dns settings in my v4.

Are you using yours as a DHCP Server? Is your snap setup with a static IP or uses DHCP to retrieve the info? If static try dhcp and have your router reserve the IP the snap is on.

If you have modified internal files for special settings, these are not supported. The latest versions have really locked the OS down tighter. I think users were trying to run software that was not approved.

On startup looking at the log file is it's reporting any errors? May need to connect via com port and capture the kernel load.

If you have the gsu file you can try reloading the OS.

FTP, I only have 1 setting for my FTP either on or off and allow guest. Nothing else to change. I run mine as a FTP and have no problems with it. This could be a router problem and not snap, since the router points the port to the IP address.