Synology DSM 6.2.4 255556 - latest update

I have 4 different Synology NAS’s, ranging from a 413 to a 1621xs+, and so 4 different types of CPU. All had zerotier installed and working correctly under the last DSM (DSM6.2.4 25426 Update 3). They have all recently auto updated to DSM 255556 and they have all now stopped working.
The zerotier app on the DSM loads, but doesnt allow you to join a zerotier network, just ignores the Network ID when you click to ‘Join’.
Is zerotier aware of this? I can only expect that all synologys that update to this DSM will fail to work with zerotier…

I’m having the same issue.
Is there a fix?

Are we the only two to suffer this issue?
Interestingly, the issue seems to be with joining a ZeroTier network. If one is already established and live then the NAS continues to be connected to the network after the update, but it won’t allow a NAS that is not already connected to the network.
How do we get this bug reported to the ZeroTier support

I doubt we are the only ones…Given its affected all 4 of my NAS’s.
I agree with your observation. Where the zerotier app is already installed on the NAS and running prior to the latest DSM update then the connection remains, although the zerotier app window in DSM is blank and says ‘OFFLINE’.
My install on a new NAS with the latest DSM will not work.

This is the first time I’ve used this forum… I’m hoping ZeroTier support read these forums

Hi, I’m new here. I also have trouble to connect my Synology NAS 718+ with firmware upgrade to DSM 6.2.4-25556. I simply can’t Join (Join button doesn’t respond).

HI, I also checked DS218+ with firmware DSM 6.2.2-24922 Update 6 and it doesn’t work. Any ideas?

I also checked the older version of zerotier-1.2.8r0-syn-apollolake-6.1 on Synology DS218 +. The application cannot be started after installation.

My solution to this was to run zerotier under docker. DSM seemed to be removing the routes automatically, but adding the routes back in manually with route add seems to fix it.

All in all zerotier on synology NAS is a very annoying prospect.