@stephenw10 said in Awfully slow transfer speeds from remote NAS over ZeroTier:
Yup good to know that about zerotier, I wouldn't have thought it was required.
According to the documentation, it is not required for holepunching, but they do refer to challenges with symmetric NAT.
https://docs.zerotier.com/corporate-firewalls/#:~:text=Default%20zerotier%2Done%20listening%20ports,ZeroTier%20hole%20punching%20to%20work))
@rheuer22 Perhaps try to set Static Port (Hybrid outbound rules), to see if that has a similar effect?