Hi, Is it possible to configure bridge between internal and external network interfaces on RouterOS v7?
Obviously yes.
You can add all interfaces to bridge.
Why you want to do that (and if other changes are needed like e.g. DHCP client on current external interface) that’s another thing.
See no problem in adding bridge
I want to have external ip adress from SIM card on internal interface, so I can avoid creating “double NAT”.
[quote=Kuba post_id=1030899 time=1697633539 user_id=225259]
I want to have external ip adress from SIM card on internal interface, so I can avoid creating “double NAT”.
[/quote]
Wrong approach.
An LTE device is getting a CGNAT address so inherently you will always have double NAT as far as I know.
Carrier Grade NAT from LTE
NAT from internal network.
If you are planning on using that external IP as entry to get back in, it doesn’t work that way either (unless you have a TRUE fixed mobile IP which would surprise me).
You will first have to create a tunnel from that device towards another device having a real fixed IP and THEN you can come back in using that tunnel.
Done it for years that way using SXT LTE device which was located in France.
You can also use pass-through mode on the LTE modem but still there will be a CGNAT layer.
So I bought Mikrotik Chateau 5G AX, and I try to bridge LTE interface and ether1. I added interface ether1 without a problem but I don’t see LTE1 interface to choose in here. How to do it? Oh and I have true fixed mobile IP.
You can set passtrough interface for APN in use. It’s under interfaces → LTE → LTE APNs. Remove that interface from default bridge before setting it as passtrough. You can lose access to router if set bridge as passtrough interface.