[TriLUG] ATT fiber installed and gateway/routing problem

[Wes Garrison via TriLUG]

You're looking for "NAT reflection".  Some people call that "loopback", but
I think reflection is the proper term.

https://forums.att.com/t5/AT-T-Internet-Equipment/NVG589-NAT-loopback-reflection-possible/td-p/3866231

It looks like it's not possible, but if you set it to "passthrough mode",
the router will see your Synology as having your public IP.

This is not a true "bridged" Ethernet, and adds some overhead, but it still
seems to work in most cases.

-Wes

_________________________________
Wesley S. Garrison
Network Engineer
Xitech Communications, Inc.
phone:  (919) 260-0803
fax:       (919) 932-5051
__________________________________
"Lead us not into temptation, but deliver us from email."

On Sat, Dec 3, 2016 at 7:19 PM, Christopher Merrill via TriLUG <
trilug at trilug.org> wrote:

> Looks like Scott and I are on the same schedule :)
>
> I had the install yesterday. The tech was considerably more knowledgeable
> than I have come to expect from utilities. There were a few things I wanted
> done in specific ways and he was very accommodating. To the point that I
> called his supervisor to mention the good service.
>
> Using the Google Fiber speed test, I got results similar to Scotts. And
> ~15ms latency to major datacenters (AWS, Facebook).
>
>
> Unfortunately, I've also experienced unhappiness with the provided
> gateway/router - 5268AC. Note that I previously had UVerse with their
> gateway in place. Like many of us, I run a server at home (Synology
> Diskstation). Our family uses this for music, photos, notes and some email.
> After duplicating my previous setup, almost everything works well. There
> are bunch of ports routed though to the Diskstation to support these
> services.
>
> Here is the problem I've run into: connections to the public IP from inside
> the network are refused. I've tested this from several Android devices as
> well as from Windows. Summary of symptoms:
> 1) If I connect to the Diskstation directly (the local IP or internal
> hostname) from inside the network (wired or wireless), everything works
> 2) If I connect to the Diskstation via the external/WAN/public IP from
> outside the network, everything works
> 3) If I attempt to connect to the Diskstation via the external/WAN/public
> IP from outside the network, all connections are refused
>
> #3 was not the case previously. I've searched through the settings on
> the 5268AC and don't see anything that seems like it would control this. Is
> there a specific term I should be looking for?
>
> If you have any ideas on how to remedy this, I'd love to hear them :)
>
> Chris
>
>
>
>
>
>
> --
> ------------------------------------------------------------------------ -
> Chris Merrill                           |  Web Performance, Inc.
> chris at webperformance.com                |  http://webperformance.com
> 919-845-7601 x701                       |  919-845-7601
>
> Web Performance: Website Load Testing Software & Services
> ------------------------------------------------------------------------ -
> --
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