I could really use some help with configuring a double NAT setup at home. This attachment has a diagram of what I'd like to do:
View attachment 8269
My relevant equipment is:
NAT1 is an ARRIS TG1682G
NAT2 device is an ARRIS SB6782-AC
My IT skills are low, but this is a learning project!
Paul
This is wrong (assuming your netmask is 255.255.255.0). Read @CaptainSTX post again. You have put both routers on the same network (10.0.0.x). If you want to have a double NAT (Network Address Translation) setup they need to be two different networks, e.g. 10.0.0.x and 10.0.1.x.NAT1 had an IP range of 10.0.0.1 - through whatever the default is. I changed the range to 10.0.0.2 - 10.0.0.100 and I changed NAT2 to 10.0.0.100 and gave it a range of 10.0.0.101 through whatever the max is. NAT2 started off with defaults in the 192.168.0.1 range.
This is wrong (assuming your netmask is 255.255.255.0). Read @CaptainSTX post again. You have put both routers on the same network (10.0.0.x). If you want to have a double NAT (Network Address Translation) setup they need to be two different networks, e.g. 10.0.0.x and 10.0.1.x.
It begs the question, why do you want double NAT? Most people here are trying to avoid this kind of setup!
Disclaimer: I know nothing about MOCA.
If all you want to accomplish is as shown and you don't need to share resources between NAT 1 & Nat 2 your setup is:
Set up NAT 1 with automatic WAN IP from your modem. Set the LAN IP of your NAT 1 router to 192.168.1.1 and your DHCP on that router to 192.168.1. 120 -140. You can use another subnet if you choose.
Connect your MOCA adapter to a LAN port on your NAT 1 router.
Using the another MOCA adapter connect it to the WAN port of NAT2 router.
Set the WAN IP on the NAT 2 router to automatic.
Set the LAN address of NAT router 2 to 192.168.2.1 and be sure DHCP server is enabled and set the pool to 192.168.2.100-120 depending on how many DHCP addresses you need.
For security be sure that administrative access from the WAN is off on both routers.
I use a similar set up and it works fine.
No. Routers will route traffic that doesn't belong on the LAN to another network. That's why they're called routers.Do I have to set my subnet mask differently?
NAT2 device is an ARRIS SB6782-AC
Thanks, I was starting to wonder if that was the case. I was getting some really misleading indications that probably stem from the way I was connecting both devices, which is what I was trying to fix in the first place.
The device is trying very hard to phone home over the coax connection - yeah, it does MOCA as a secondary function, but that coax connection really, really wants to phone home, and there is little control over it, as it's generally assumed to be a managed WAN connection...
No, straight-through.Does this new cable need to be pinned out as a crossover?
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