Netmap for multiple IP addresses

RouterOS General
1

I have managed to configure Netmap for one public IP address.
Supose we have two WAN IP-s like 80.80.80.80 and 81.81.81.81
and one LAN IP like 192.168.1.1. I want to have 81.81.81.81 asigned to
192.168.1.10, I used the following configuration:

/ip address
address=80.80.80.80 interface=WAN
address=81.81.81.81 interface=WAN
address=192.168.1.1 interface=LAN

/ip firewall nat
chain=dstnat dst-address=81.81.81.81 action=netmap to-address=192.168.1.10
chain=srcnat src-address=192.168.1.10 action=netmap to-address=81.81.81.81

Now, if I want to netmap a whole range of public IP address to the local network,
it turns out I need to asign all those addresses to the WAN interface. Is there any way
to do this not using the above configuration?

Thank you, Toni

2

actually, all you’ve done is simple src/dst-nat. ‘netmap’ is used to map 1:1 subranges: for example, map 192.168.0.0/24 to 80.80.80.0/24

if you don’t want to add all addresses to router interface - you may use Proxy ARP feature

3

Yes, that is exactly what I want to do, map 192.168.1.0/24 to 81.81.81.0/24,
and of course without adding all the IP address.
In this case I should do what? Just use proxy-arp on the WAN interface?

4

try something like

/ip firewall nat
chain=dstnat dst-address=81.81.81.0/24 action=netmap to-address=192.168.1.0/24
chain=srcnat src-address=192.168.1.0/24 action=netmap to-address=81.81.81.0/24

/ip route add dst-address=81.81.81.0/24 type=unreachable
/interface ethernet set WAN arp=proxy-arp
5

Thanks for your input, although I don’t quite understand it :slight_smile:
What is used for “type=unreachable” in routes?

Thank you again, Toni

6

I hope, it helps ProxyARP to know that it should answer ‘81.81.81.X’ ARP queries =) if you have default gateway on WAN - it should keep silence, as far as I understand that…

7

I see, I’ll let you know if this is going to work