Is port 564 (9P) dangerous?

Port 564 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 564 be open on my firewall?

Port 564 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

Port 564 (9P) uses the TCP transport protocol and falls under the File Transfer category.

:564 (TCP)

Medium Risk

TCP — File Transfer

Port Number 564

Service Name 9P

Transport Protocol TCP

Category File Transfer

Security Risk Medium

Port Range Well-Known (0-1023)

Port 564 is associated with 9P (Plan 9 File Protocol), from Bell Labs Plan 9 OS. Also used in modern virtualization (virtio-9p, WSL2).

TCP File Transfer

Port 564 (9P) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.

Recommendation: Keep the service updated. Monitor logs for unusual activity.