Moving to a new ISP

Matt75
Comes here often

Moving to a new ISP

Hello,

 

We are moving to a new ISP.  We've been given a WAN /30 block, and an additional LAN /29 block.  I have my WAN eth01 configured for the /30 address (xxx.xxx.206.206).  I'm not sure the best way to setup the additional /29 ips (xxx.xxx.206.234-238) to NAT to inside/private LAN addresses.

 

Thanks,

 

Matt

3 Replies 3
Ryan_Miles
Meraki Employee
Meraki Employee

So, the /29 is for internal hosts that need to be accessed by the outside world? You can create the /29 subnet on the LAN side of the MX. Then create 1 to 1 NAT rules using the same real IP in both the Public and LAN IP spots. Screenshot examples below. And apologies if I misinterpreted your goal.

 

Or if the inside hosts will have private IPs then just adjust from the screenshot below to have the real/Public IP map to the corresponding private IP.

 

Screen Shot 2022-03-09 at 12.08.34.pngScreen Shot 2022-03-09 at 12.09.25.png

Matt75
Comes here often

You are correct.  The ip's on the /29 do need to be accessed outside.  I would have to NAT the outside addresses to the private LAN address (192.168.176.x).

 

Got it. So yeah use the 1:1 NAT config and if you need to further limit it to specific accessible ports click the allow more connections link shown in the screenshot.

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