Andymc1987

If you want to force specific servers then you will need to set Ping Assist to 0 and then it will work, otherwise you always have the chance that you'll get a game not in your radius

check these out. hope this helps.
 
https://support.netduma.com/support/solutions/articles/16000077072-dumaos-optimal-settings-guide-geo-filter
 
https://support.netduma.com/support/solutions/articles/16000087579--dumaos-optimal-settings-guide-ping-assist

Unfortunately I don't believe there's any way to get DumaOS back on the old R1 units that doesn't take place internally here at HQ.
You could try sending an email over to [email protected] and explain the situation there, we'll discuss it with the team and see if there's anything that can be done.