On June 2nd Netgate released pfSense® Plus 21.05 which we have found to be incompatible with our DTTS feature on the SG-3100 appliance.
As a result we advise users not to upgrade, and if it’s a new appliance to downgrade it to v21.02.2 until there is further information which will be posted here.
As far as we know at the time of posting, other appliances are OK.
Thank you
– Adam Networks team