Bridge - NAT

RouterOS General
1

Hi all,

I’ve got a transparent Bridge between one host and a Network. What I want to achieve is, that all packets from the host behind the Bridge look like they were originated from the Bridge itself (on Layer2 not IP) or maybe a 3rd MAC-Address.

The Idea is that the Network always sees the same MAC-Address even if the MAC-Address of the host behind the Bridge changes.

I tried to achieve this with the NAT Settings of the Bridge, but I wasn’t able to make this work. The host replys with the correct MAC but in the packet itself it tells other hosts its real MAC-Address.

Has some out there an idea how this could be done?

Many Thanks!

  • Mat
2

By definition the bridge is NOT transparent if you don’t see the end devices MAC address.

You need to re-evaluate your bridge settings.

3

Well, at the moment the bridge is transparent. After the change it isn’t really transparent, that’s true.
My goal isn’t a 100% transparent bridge. My goal is that the host appears with the mac of the bridge. But I think I found a possible solution for that. Proxy-arp may do what I need.

Thanks!

  • Mat