On 02/03/2017 01:23 PM, Matt Garman wrote:
On Fri, Feb 3, 2017 at 12:08 PM, John R Pierce <pierce@xxxxxxxxxxxx> wrote:
for Comcast/Xfinity, I'm using a Arris SB6183 that I got at Costco. this
is a simple modem/bridge, so /my/ router behind it gets the public IP.
Note that some residential ISPs may not offer "naked" Internet, and/or
won't allow you to bring your own device (BYOD). At least in my area,
there are only two options for residential Internet; cable-based via
Comcast, and DSL-based via AT&T. I used to routinely switch back and
forth between the two, to play them against each other for the best
rates. However, I had to give up on AT&T because they stopped
offering a "naked" service. That is, when I was using them, I had the
most basic DSL modem, that literally did nothing except provide me
with a public Internet IP and the service. Last I talked to them, I
could only use their service with their fancy all-in-one devices, that
are both a DSL modem and gateway/router/wireless AP. I already have
all that infrastructure in my house, and I trust my ability to manage
it more than I trust the blackbox firmware that AT&T provides.
Going from memory, that all-in-one DSL service did give me a public
IP, but the device itself implemented NATing, so it looked like I was
getting a private IP. There *may* have been a way to remove most of
the functionality of the all-in-one device ("DMZ mode" or something
like that); it's been discussed pretty heavily on the DSLReports
Forums. (But, either way, even ignoring the technical grievances with
their service, AT&T's prices are higher and speed tiers lower than
Comcast's.)
TL;DR: (1) some ISPs may not allow BYOD; (2) if it looks like your ISP
is giving you a private IP, dig a little deeper, it could simply
appear that way due to the way the ISP configures the assigned device.
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Thanks to all that replied. I had ran nmap against from the private side and saw it
had a service listening on port 80, so I pointed my browser at it and a webpage
came up. I looked like it was for setting up the "Wireless" because that is what the
menu button said, so I initially didn't investigate it until after I had sent my previous
message. Turns out it gives you full access to setting up port forwarding, DMZ, firewall, etc.
So it looks like I can use DMZ mode an be in business.
Regards,
Steve
PS Brighthouse/Spectrum in my area lets you BYOD from a pretty large list they have certified
on their network.
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