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Forum Discussion
Dinner42w_aView
Nov 27, 2025Aspirant
Can LAN interface of RS100 be set to a public IP address?
I have obtained a /29 range of public IP addresses from my ISP. That /29 network resides on the LAN interface of the cable router/modem/whatever you want to call it. At the moment I am using a Zy...
Dinner42w_aView
Nov 27, 2025Aspirant
Hi StephenB,
The WAN side of the router connects to the ISP via PPPoE and gets a separate, single IP address . They've configured their end so that 'the internet' knows the next hop to the /29 subnet is via the public IP that's allocated to the router's WAN port.
It's the PPPoE element that's forcing me to use a router rather than a simple switch.
I have two firewalls (a main and a standby) on the LAN side of the router. Each firewall has two WAN ports. Each WAN port requires an individual static IP address for the firewall rules to work.
If I didn't use multiple static IPs, every WAN port would (as far as the system is concerned) have the same public IP address and then the firewall doesn't know which WAN port to direct incoming traffic to. Ask me how I know....
StephenB
Nov 27, 2025Guru - Experienced User
Dinner42w_aView wrote:The WAN side of the router connects to the ISP via PPPoE and gets a separate, single IP address . They've configured their end so that 'the internet' knows the next hop to the /29 subnet is via the public IP that's allocated to the router's WAN port.
It's the PPPoE element that's forcing me to use a router rather than a simple switch.
The RS100 isn't a router I have, and I don't need multiple public addresses. So not something I've tried.
That said, it looks like the RS100 has the features you want.