SMB Mount regardless of being related to native community (MacOS 13.7.1)

I am flabbergasted by an surprising SMB mount on my MacOS. Right here the state of affairs

1. I am not related to my native community (truly in a lodge related by a vpn to the web, therefore not even the IP vary is wherever comparable)
2. I observed my nas being obtainable within the finder. The SMB ports usually are not forwarded by the router at house. The router has a DSLit IPv6 handle, i.e. no (static) IPv4
3. I can truly entry the recordsdata on the nas, so this isn’t a ghost from the previous or pure metadata cache.

I do not know how that works! Sadly MacOS is horrible in getting data out. Right here a number of issues I’ve tried, particularly to attempt to pin down how my Mac is connecting to the (very) distant nas

dscacheutil -cachedump -entries nas.native
Unable to get particulars from the cache node

dns-sd -B _smb._tcp
Timestamp     A/R    Flags  if Area               Service Sort         Occasion Identify
17:19:55.433  Add        2  17 native.               _smb._tcp.           NAS

dns-sd -L NAS _smb._tcp
Lookup NAS._smb._tcp.native
DATE: ---Wed 20 Nov 2024---
17:21:39.439  ...STARTING...
17:21:39.628  NAS._smb._tcp.native. may be reached at nas.native.:445 (interface 17)

The native IP handle of the nas cannot be pinged. Request timeout for icmp_seq 0

If anybody has an thought how the mechanics work, I would be very eager about understanding this!

Cheers,
U