Forum Discussion

Sylvester2999

Aspirant

Nov 15, 2017

Solved

R7800 configuration Freebox & Nas syno sur 2 reseaux

Bonjour , Est-il possible d’acceder à un Nas Synology sur 2 reseaux ? Le reseau 192.168.0.x pour serveu...

Installation

antinode
Nov 16, 2017
> Je n'ai rien modifié dans la configuration de R7800

   That is expected. The R7800 does not need any new information.
Any message to a foreign subnet gets sent out through its WAN port.

> Je n'ai RIEN ajouté dans les redirections de la Freebox

   Ah, yes. If the connection is made by a client on the R7800 LAN,
then NAT (on the R7800) may do everything you need. The Freebox will
see a connection coming from the R7800 WAN interface (192.168.0.2). It
will reply to that, and NAT on the R7800 will pass the reply to the real
client on the R7800 LAN.

   If the connection is to be made by a client on the Freebox LAN,
_then_ the Freebox will need a static route to the R7800 LAN.
(Otherwise it would send the message to your ISP.)

   So, in one direction (R7800 -> Freebox), NAT solves the problem. In
the other direction (Freebox -> R7800), the route is required. Sorry
for the (my) confusion.

antinode

Guru

Nov 15, 2017

   If Google reads your French correctly, and if I understand your
network, then ...

   The Synology NAS is on the 192.168.0.x (Freebox LAN) subnet. Let's
say the NAS is at 192.168.0.N.

   The R7800 LAN is the 192.168.1.x subnet.

   Let's say that there's a client on the R7800 LAN, at address
192.168.1.C. This client wants to send a message to the NAS (at
192.168.0.N). The client sees that the NAS is on a different subnet
(192.168.0.x, not 192.168.1.x), so it sends the message to its default
gateway, the R7800. The R7800 also sees that the NAS (192.168.0.N) is
on a different subnet, so it passes the message to its default gateway,
the Freebox. The Freebox knows that 192.168.0.N is on its LAN, so it
delivers the message to the NAS.

   Now, the NAS will have a reply for the client (at 192.168.1.C, on the
R7800 LAN), which is not on its own subnet, so it sends the reply to its
default gateway, the Freebox. The Freebox must pass the reply to the
R7800, but how does it know that? Normally, it sends foreign messages
to your ISP. You can tell the Freebox to pass such a message to the
R7800 by defining a static route (on the Freebox):

      Destination: 192.168.1.0 \ (the R7800 subnet...)
      Subnet: 255.255.255.0     /
      Gateway: 192.168.0.2        (the R7800 WAN address)
      Metric: <anything>

   Then, each router knows how to find the subnet of the other router,
and clients on either subnet can get messages to and from clients on the
other subnet.

Sylvester2999

Aspirant

Nov 16, 2017

I do not know if goggle to properly translated?

I have an incorrect translation return

Thanks Antinode for the answer,

(Goggles, translation me too,

I think I have understood!!!!)

I check and test in the day

And I answer (in the evening)