I would like to set up a cisco 2811 as a bridge and pass my public address through to my ASA firewall. At the moment I have the outside interface ATM0/3/0 in bridge-group 1 and BVI1 holds my public address. My inside interface Fa0/0 is configured with a 10.3.10.1/16 address with the outside interface of my firewall on 10.3.10.2/16.
I was hoping to acheive this with the following configuration: (I have changed the IP addresses)
I need to pass my public IP address of 18.104.22.168 255.255.248.0 which is currently on a 2811 router (see config below), through to my ASA 5510 firewall and just have the router as a transparent bridge with no ip addresses
Any advice would be much appreciated as I'm not that confident that my solution is going to work (see further below).
Is the reason you are needing to do this due to that being the only public address you have available to use? If not, I would suggest the use of another available public address in that range and proxy ARP. If so, you might be able to utilize static NAT mapping at the port level to support specific protocols as opposed to bridging. Based on the supplied config, the ATM is the public from your provider, right? Just wanted to make sure that is clear.
Yes, just one ip address at the moment. I have a leased line on order but for the meantime I have to make do with what I've got and I need the public address from my provider, presently on the ATM shifted over to the ASA. I've been told this is quite a common set up but I can't seem to find any documentation on it. Any pointers would be much appreciated.
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