IP which is not there but wg0 replies - ?

[lejeczek]

Hi guys.

Purely accidentally I stumbled uppon:

-> $ ping 10.1.101
PING 10.1.101 (10.1.0.101) 56(84) bytes of data.
64 bytes from 10.1.0.101: icmp_seq=1 ttl=64 time=0.148 ms
64 bytes from 10.1.0.101: icmp_seq=2 ttl=64 time=0.415 ms

-> $ ip a ls dev wg0
17: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 8920 qdisc 
noqueue state UNKNOWN group default qlen 1000
     link/none
     inet 10.1.0.99/24 scope global wg0
        valid_lft forever preferred_lft forever
peer:
14: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 8920 qdisc 
noqueue state UNKNOWN group default qlen 1000
     link/none
     inet 10.1.0.100/24 scope global wg0
        valid_lft forever preferred_lft forever

This a wg0's IP.
Someone could shed a bit more light on that - I'd imagine 
many will appreciate, I will.
I'm thinking - is my ipcalcing messed up..
many thanks, L.