Hello guys
I have OPNsense on Proxmox with intelNUC and usb lan adapters which are working fine. Wanted to make dual wan so that second WAN will work as a backup. It is data transmission modem. Modem is connected to opnsense via usb lan adapter then in proxmox i have bridged physical adapter with virtual network card which is added to opnsense machine. Im setting up multi wan with this guide https://docs.opnsense.org/manual/how-tos/multiwan.html I'm configuring it exactly the same as in guide but despite that WAN2 stays offline. I wanted to exclude the network adapter so I have simply added this card to some linux machine to test if it works and provides the internet and it works like a charm. Any idea what can we do to fix that issue with opnsense? Proxmox version is 25.7.5
Found some other topic regarding multiwan here and when it comes to NAT rules there are only rules for WAN1, dunno how to add them manually.
Assignments
(https://i.imgur.com/wDFIQps.png)
Gateway groups
(https://i.imgur.com/M2GAPGZ.png)
Outbound NAT rules
(https://i.imgur.com/v48dDtF.png)
Hey there,
Not an extreme specialist onto multi-wan, though have a few of these in my setup.
Onto your modem uplink, have a check on the followings when connected to OPNsense:
-- interfaces>overview --> you'll directly check if an IP stack is bound to your vtnetX "wan2" interface.
-- system>gateways>configuration --> you need a gateway per uplinks, one for your WAN2 should be present.
-- system>gateways>group --> you'll need a GW group to pool your uplinks (I do this in Tier1 + weight if needed (asymmetrical uplink bandwidth etc..)
As for NAT, obviously depending on what is behind the OPNsense wan2 port, you either need to do NAT at the OPNsense level or you can leave it to the upstream device if it does NAT. IE: LTE modems are usually per default doing NAT in between their LAN port and the LTE uplink.. However, I do prefer to have NAT under my control, so whenever addressing an entity labeled as WAN within OPNsense, I'd apply NAT and in a old school manner: Manual outbound NAT rule generation.
Hope this helps a bit.
Cheers,
Thanks a lot man!!
Without you I wouldnt find the issue tbh. The reason my second port didnt work was that I didnt set the way of receving ip address on port configuration in OPNsense. After setting DHCP everything went up, connections are switching when my main is down and its going back to normal when the main is back. Thanks a lot!!
This post will remain for the future use :D