Hi, I've pondered on this for a little while, and when i get a new public IP on my WAN if this still happens...

How does my ISP give me a public (DHCP) address of 81.156.x.x, which shows in Winbox, but the network address is in Winbox shows as 172.16.11.215???

Thanks
Colin.

The answer is either 42 or NAT.

Thanks for the link - very clear.

i use 42 all too often