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5 Messages
arris sb8200 cable modem has two ethernet ports
The SB8200 cable modem has two ethernet ports. I'm hoping to split traffic into two legs. One leg would be non-critical devices (tvs, scales, dvd players). The other would be for all devices that I want to be secured. Those devices would connected to a router in back of a hardware firewall.
Accepted Solution
EG
Expert
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110K Messages
4 years ago
You would need an additional WAN / public IP address to be assigned to your connection if you want both ports to be able to access the internet. They are phasing it out. There would be an additional charge if it's even available anymore. Is this what you are looking for ?
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jwk_fxdci2005
New Poster
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5 Messages
4 years ago
I was thinking that two IPs would be needed. When I verified th sb8200 device with their approved list, it was listed and I was hoping to see some indication as to whether they supported the 2 ethernet config. I didn't give too much thought to the money aspect.
Thanks you probably saved an hour of debug time and a call in to comcast.
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Andyr1
Gold Problem Solver
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8K Messages
4 years ago
Plus, you will need two separate routers.
Or, with some better routers, you could create VLAN's to separate your internal networks with just one external IP address. I've even seen some use the guest network option for devices that don't need local access.
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jwk_fxdci2005
New Poster
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5 Messages
4 years ago
As I have 4 routers and a firewall. I was going to connect 1 wireless router to 1 ethernet port and all the non critical stuff would connect to that (alexa, scale, 2 wireless dvds, and a wireless extenders for upstairs). The other ethernet port would get 2 routers (daisy chanined) then a HW firewall then finally the important router.
I could probably get the same effect more or less by plugging the hardware firewall into the cable modem then split the traffic on the backside of the hardware router. I've found that these routers diasy chained together do a good job of tossing unsolicited DOS and port scans away and that the firewall gets very little traffic that it needs to reject.
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