Access GPON ONT behind WiFi router through WAN port

Access GPON ONT behind WiFi router through WAN port

Access GPON ONT behind WiFi router through WAN port
Access GPON ONT behind WiFi router through WAN port
3 weeks ago - last edited 2 weeks ago
Tags: #Port Forwarding #GPON ONT
Model: Archer AX72  
Hardware Version: V1
Firmware Version: 1.2.6 Build 20240619 rel.72016(4555)

Hi :)

 

I am trying to setup access to my GPON ONT web GUI from my router LAN but with no success.

The GPON ONT is set up in bridge mode and connected to my router through the WAN port.

The ONT has a default IP address 192.168.100.1

The AX72 has a default IP address 192.168.0.1

 

I know I can access the ONT when connecting it directly to my PC's Ethernet port and setting up the network IP and Gateway, but I would like to have access to it without needing the direct connection.

I saw some threads online explaining how to do it but on different routers and through running some commands on it through SSH. Not sure it is possible to do this on the tp link routers and prefer not to do it.

 

Tried applying a similar change through the routing setting by applying a static routing record that gets reflected on the routing table, but couldn't get it to work.

Main things I tried where to define a static routing rule for the 192.168.100.1 (or 192.168.100.0/24 subnet) with the gateway being either 192.168.100.1 or the Internet IP address as it appears on the router's page.

 

Any ideas if this is possible to achieve?

  0      
  0      
#1
Options
1 Accepted Solution
Re:Access GPON ONT behind WiFi router through WAN port-Solution
2 weeks ago - last edited 2 weeks ago

  @Leo1319 

 

Yes, if you enable DHCP on the ONT most probably it would brake its bridge mode.

I believe that you don't login often into the ONT WebGUI, so when the time comes you can always connect your PC directly and make the neccessary changes.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
Recommended Solution
  1  
  1  
#6
Options
6 Reply
Re:Access GPON ONT behind WiFi router through WAN port
3 weeks ago

  @Leo1319 

 

TP-Link home grade routers don't support SSH commands.

If you open your AX72 Advanced=>Network=>Routing you should see the default route:

Destination            Network Mask          Gateway                                     Interface

0.0.0.0                   0.0.0.0                      <your Internet IP address>        WAN

This is the default route and it should include the destination 192.168.100.1.

If you can't ping 192.168.100.1 from your PC you may try setting a static route:

 

or if that doesn't work change the Default Gateway to 0.0.0.0 and try again.

If you still can't access the ONT delete the static route, try addig a second IP address to your PC network card - for example 192.168.100.254 and test again.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
  1  
  1  
#2
Options
Re:Access GPON ONT behind WiFi router through WAN port
3 weeks ago - last edited 3 weeks ago

  @terziyski 

 

Thanks! unfortunately it is still not working, but there is some progress, so I guess we might be able to tweak it somehow.

Indeed I was unable to ping the ONT initially, and when adding the static route (same result with both default gateway options), I am still unable to ping it, but I do get a response back and it is from a 169.254.x.x IP address now that the destination is unreachable.

ping result after adding static route

I think this has something to do with DHCP issues, right?

 

Any clue how we might be able to fix that?

P.S. adding a secondary IP didn't help :(

 

Here's how the routing table looks like after adding the static route

routing table

  0  
  0  
#3
Options
Re:Access GPON ONT behind WiFi router through WAN port
2 weeks ago

  @Leo1319 

 

169.254.x.y address is a link-local IP address and usually you see it if a device is unable to get an IP address using DHCP.

I'm affraid that you may not be able to access the ONT IP address via the router.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
  0  
  0  
#4
Options
Re:Access GPON ONT behind WiFi router through WAN port
2 weeks ago

  @terziyski 

I think I saw somewhere a setting for DHCP on the ONT itself and it was disabled

Do you think that enabling it might help? or would it break the connection to internet since it is working in a bridge mode so it shouldn't have a DHCP server?

  0  
  0  
#5
Options
Re:Access GPON ONT behind WiFi router through WAN port-Solution
2 weeks ago - last edited 2 weeks ago

  @Leo1319 

 

Yes, if you enable DHCP on the ONT most probably it would brake its bridge mode.

I believe that you don't login often into the ONT WebGUI, so when the time comes you can always connect your PC directly and make the neccessary changes.

If this was helpful click once on the arrow pointing upward. If this solves your issue, click once the star to mark it as a "Recommended Solution".
Recommended Solution
  1  
  1  
#6
Options
Re:Access GPON ONT behind WiFi router through WAN port
2 weeks ago

  @terziyski 

Thanks for the help on this one!

 

Agree, definitely not something that needs to be done often. However, would love to this supported by tp-link routers somehow in the future.

  0  
  0  
#7
Options