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Yep, because It's public IP OVH give us /32 address.

Thank to the option "Far Gateway" I can access the gateway and internet. I managed to create my VIP with the .203 and now this IP is accessible from the outside.

Now I just need to figure out how to do my 1:1 nat on opnsense.

Thank you for your help Bart, I will close the topic  :D

Hello Bart,

Thank you for you replie. You're right, I can't do it like that with because I don't have a proper transit.

I have an OVH server with esxi on it. My firewall have a public IP on his WAN interface and I want to use another Public IP to do separate trafic and do an 1:1 nat on that one.

So : Gateway is 51.xx.xx.254/32, WAN is 51.xx.xx.202/32 and the second IP is 51.xx.xx.203/32

OVH filter IPs by the assigned MAC address. If I create a Virtuel IP on the WAN interface, would I be able to separate the different flow and use it to do a 1:1 nat ?

Hello,

I don't know if someone can help me but, I'm facing a problem.

I have setup correctly an public IP to my Lo1 interface. From this interface I can ping my gateway and internet (no problem with that).

root@FW-OVH-01:~ # ping -S 51.xx.xx.203 1.1.1.1
PING 1.1.1.1 (1.1.1.1) from 51.xx.28.203: 56 data bytes
64 bytes from 1.1.1.1: icmp_seq=0 ttl=53 time=4.929 ms
64 bytes from 1.1.1.1: icmp_seq=1 ttl=53 time=4.935 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=53 time=4.961 ms

I want to use this loopback interface to do many things, but at first I want to ping it from anywhere, and I don't know why, but I can't manahe to do it.

I have setup a rule like that in the WAN Rules section :

Interface : WAN
Direction : In
TCP/IP : ipv4
Protocol : ICMP (any icmp)
Source : any
Destination : Lo1 address
Action : Pass

even if I do like that it's not working :

Interface : Lo1
Direction : In
TCP/IP : ipv4
Protocol : ICMP (any icmp)
Source : any
Destination : Lo1 address
Action : Pass

I don't know what I'm doing wrong but it's dosen't work. It's my first time testing OPNsense. Because it's a stateful FW, I normaly don't have to setup a out direction rule, so...

Thanks in advance to anyone who will take the time to help me.