Configure OpenWrt router behind ISP router

Installing and Using OpenWrt
1

Hello,

I am a totally beginer in network configuration and so in openwrt.

I put the openwrt router just behind my ISP router to have a better wifi coverage and to connect other equipment in lan.

On my ISP router, I have my printer that I would like to have access when I am connected to openwrt router network which it is not the case right now.

I have few configuration possibilities on my ISP router but I was able to put static lease for openwrt router. On openwrt router, I put IP route to my ISP router. So when I ping my printer, I have a response but when I try to print something while I am connected to openwrt network, I can't. My computer do not see my printer.

Could you please help me to have access to my printer from openwrt network ?

Thank you in advance.

2

If you don't want to have anything special been done by the Openwrt router and just use it for better Wifi coverage suggest to use it as a dumbap.

4 Likes
3

Thank you for your reply.

I am discovering openwrt and I am learning how to use it. So I will try other things in the futur but in meanwhile I would like to have access to the printer.

Seeing as I can ping my printer I assume that I need to configure the firewall but not sure... ?

4

In your current configuration printer is located in DIFFERENT network. Does it allow to print for clients behind NAT?

5

My printer is a basic wifi printer. I don’t know if it authorize or not, I didn’t find anything about it in the manual.

However, whatever the equipment I connect to ISP router network I can’t see it when I am connected to openwrt network.

I read that it might be a double nat issue. I thought to solve this problem with IP routes but it was not enough...

6

Configure OpenWRT router as DumbAP, as it was suggested above. It is problem of your printer, not OpenWRT.

1 Like
7

Thank you, I will do as suggested and configure OpenWRT router as DumbAP but is it possible to explain to me why is not possible to create a gateway that allowing the communication from a computer of OpenWRT network to the printer or any other device of ISP router?

8

It's possible, but more complex, and generally less convenient, that dumb AP mode.

9

In 'common' network devices are equivalent, so one device can access another. In network behind NAT device behind NAT can not be accessed easily.

10

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