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How to know the IP Address of my ONT Modem to which my TP-Link router is connected?

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How to know the IP Address of my ONT Modem to which my TP-Link router is connected?

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How to know the IP Address of my ONT Modem to which my TP-Link router is connected?
How to know the IP Address of my ONT Modem to which my TP-Link router is connected?
2022-10-05 04:05:58 - last edited 2022-10-05 14:25:46
Tags: #IPv4
Model: Archer C20  
Hardware Version: V5
Firmware Version: 0.9.1 4.17 v0001.0 Build 200915 Rel.56357n(5553)

I know my router's LAN IP Address. But I want to know my Modem's LAN IP Address to which my router is connected, so that I can access Modem settings in future. Is there anyway to know that? 

A sticker on the backside of the modem says it's IP Address is 192.168.1.1, but it won't work. Please help me out. I am ready to use third party utilities and services to know my Modem's LAN IP Address as well.

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Re:How to know the IP Address of my ONT Modem to which my TP-Link router is connected?-Solution
2022-10-05 12:47:13 - last edited 2022-10-05 14:25:46

  @Anan_265 

 

Unless your ONT Modem is in bridge mode, Archer C20's WAN default gateway should be the ONT Modem LAN IP address:

 

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Re:How to know the IP Address of my ONT Modem to which my TP-Link router is connected?-Solution
2022-10-05 12:47:13 - last edited 2022-10-05 14:25:46

  @Anan_265 

 

Unless your ONT Modem is in bridge mode, Archer C20's WAN default gateway should be the ONT Modem LAN IP address:

 

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Re:How to know the IP Address of my ONT Modem to which my TP-Link router is connected?
2022-10-05 14:19:44 - last edited 2022-10-05 14:25:27

Thank you for the reply. But I can't access the modem. I guess there is something wrong with my modem or my ISP configured it in such a way that it can never be accessed or only be accessed by them.

 

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Re:How to know the IP Address of my ONT Modem to which my TP-Link router is connected?
2022-10-05 16:26:03

  @Anan_265 

 

I see that your ISP is using PPPoE connection. In this case you should contact them and ask if accessing their ONT modem is allowed/possible.

You also have a double NAT introduced by this configuration - they can advise you if avoiding it is possible.

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Re:How to know the IP Address of my ONT Modem to which my TP-Link router is connected?
2022-10-09 12:06:23
Thank you for the reply, I unplugged WAN cable from router and directly connected to my PC and still failed to access my modem. "Default Gateway" shows an IPv6 address which never works. I guess, without the need of contacting my ISP, I can say that modem is blocked from access.
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Re:How to know the IP Address of my ONT Modem to which my TP-Link router is connected?
2022-10-09 20:08:45 - last edited 2022-10-09 20:09:51

  @Anan_265 

 

Hi,

 

Likely the ONT does not have an active DHCP server, which means your PC won't be assigned a proper IP address automatially.

 

You mentioned a sticker on the ONT indicates its IP address should be 192.168.1.1. 

 

Therefore, manually configure the network adapter of your PC with a valid unused IP address like 192.168.1.8 and subnet 255.255.255.0. Then connect the PC via network cable to the ONT once more and try to access it via http://192.168.1.1 or https://192.168.1.1

 

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