What is localhost mappings?

[Xoid666]

I use NAT network and port forwarding from host's 127.0.0.1 doesn't work. It is Windows 7 host and Debian guest. No process listens on host 127.0.0.1

what is loopback mappings (ipv4) ???

VirtualBox>VBoxManage list natnetworks (sorry I deleted all ':' becouse the forum forbid it )
NetworkName: mynat
IP: 10.10.10.2
Network: 10.10.10.0/24
IPv6 Enabled: No
IPv6 Prefix:
DHCP Enabled: Yes
Enabled: Yes
Port-forwarding (ipv4)
p4 tcp [127.0.0.1] 10480 [10.10.10.4] 80
p8 tcp [127.0.0.1] 10880 [10.10.10.8] 80
h tcp [192.168.2.102] 2222 [10.10.10.4] 22
h4 tcp [127.0.0.1] 10422 [10.10.10.4] 22
h8 tcp [127.0.0.1] 10822 [10.10.10.8] 22
loopback mappings (ipv4)
127.0.0.1=1