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Box Bouygues Route Addition

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Cyturgis Posted messages 21 Status Membre -  
Cyturgis Posted messages 21 Status Membre -

Hello,

I want to create a separate network from my private network at 192.168.1.0/24 to set up a lab with some servers and network equipment.

I have an L3 switch that has one interface in the private network at .250 and another at 172.16.1.1/24, which will serve as a gateway for the lab equipment.

The switch has the following route: 0.0.0.0 0.0.0.0 192.168.1.254

With 192.168.1.254 being the IP from the router.

I then wanted to add the following route on my router so that my 172.16 network can communicate with the 192.168 network and the internet:

172.16.1.0 255.255.255.0 NH 192.168.1.250

However, I am unable to communicate between the two networks since the Bouygues router apparently does not support adding static routes.

The switch seems well configured, as I can ping from PC to PC between the two networks by adding a route on my machine in the 192.168 network: route add 172.16.1.0 mask 255.255.255.0 192.168.1.250.

Is there anyone who, please, has an idea to work around this problem?

Thank you in advance.

Best regards

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Réponse 1 / 1
brupala Posted messages 111947 Registration date   Status Membre Last intervention   14 422
 

Hello,

I don't specifically know the current Bouygues boxes, but it is highly likely that all consumer operator boxes cannot do any static routing, especially ipv4 (and ipv6 is often very limited, except for the freebox which performs a bit better with prefix delegation).

If you want to do real routing, you need to forget the operator box and just keep it as a bridge or NAT relay at most, and replace it with a real router, which your L3 switch already is, except that it doesn't do NAT, which is normal because it's a switch, not an internet router.

You could go for a Mikrotik product aimed at professionals (except for the price), but which allows for much more powerful features than a box, with a bit of training effort.

And there you go, there you have it ....

But man, those line spacings are so annoying!!
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Cyturgis Posted messages 21 Status Membre
 

Hello,

I thought about this possibility, but the Bouygues box doesn’t have a "bridge" mode that would allow me to connect a router behind it for my lab project.

Or is it possible to bridge the box in another way?

I saw that it was possible to spoof the box with its credentials and potentially with the MAC address, to remove and replace it. The operation seems complicated to perform, and I don't want to shoot myself in the foot by accidentally cutting off my internet access.

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brupala Posted messages 111947 Registration date   Status Membre Last intervention   14 422 > Cyturgis Posted messages 21 Status Membre
 

Yes,

  • just as it was easy to replace a box 20 years ago, a shared connection on PC could work, today it is much harder, even more so if we want to keep TV and phone, clearly, this needs to change, ISPs consider that the box is part of their network, but they either do not know or do not want to offer an open system behind it, which is abnormal, for example in ipv6, they offer a /56 block of addresses, but make it so that on their box we can hardly exploit more than one or two /64 (128 times fewer addresses).
  • After that, routing multiple networks in ipv4 is still fairly easy on an L3 switch or a router like Mikrotik, as long as you have a good grasp of network configuration, even with a NAT router in front, without bridging, it complicates things, but it remains possible within certain limits due to the fact that we only have a single public ipv4 address (increasingly behind a CGN), not necessarily limitations of the box, but we must recognize that it is not developed much in this direction.
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Cyturgis Posted messages 21 Status Membre > brupala Posted messages 111947 Registration date   Status Membre Last intervention  
 

Hi,

To summarize, I can't do my lab project on another network since it's not possible to spoof the box or put it in bridge mode?

Basically, I have a router that doesn't route much...

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brupala Posted messages 111947 Registration date   Status Membre Last intervention   14 422 > Cyturgis Posted messages 21 Status Membre
 

I don't understand why you can't set up your local network.

You don't necessarily need bridge mode; if you want to access the internet from the lab, you just need to add a NAT router that will convert the NAT addresses into addresses recognized by the box.

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Cyturgis Posted messages 21 Status Membre > brupala Posted messages 111947 Registration date   Status Membre Last intervention  
 

Hello,

I think I understand how to do it. I was certain that I needed to have routing on my box to set up this kind of infrastructure.

I found an old Orange router that should do the trick for now.

Thanks.

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