CGNAT on BSNL FTTH

Nikhil Sharma

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So yeah! BSNL is testing CG-NAT on both Broadband and FTTH connections.

Here is a separate thread for the same.

I’m getting 10.XX gateway on my router.
And 54.XX as a public IP (on speedtest)
 

vishalrao

The Global Village Idiot
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Remind us of where are you located? Still normal public dynamic IP for my BSNL FTTH connection here in Pune/Maharashtra.
 


varkey

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That only shows the gateway, what is your IP address ie the IP address assigned to you after the PPPoE authentication as shown in the ONT device @Nikhil Sharma
 
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vishalrao

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Yeah click on "IPv4" or "WAN" on the left menu of your device, it should be there...
 


Nikhil Sharma

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I’ll be able to see that tomorrow. Had to send my ONT to the vendor (Syrotech) as the voice was not working. But yes! It was different from the PUBLIC IP

Edit: I’m from a small town called Gadarwara in Madhya Pradesh
 

Nikhil Sharma

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Found a screenshot.
IP Address: 10.91.144.x
Gateway: 10.91.144.x

Public IP: 117.xxx.xxx.xx

Don’t know if it’s CGNAT but this is what I had back in April.
 

varkey

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Thanks @Nikhil Sharma, the reason I asked for the assigned IP address (and not just the gateway IP address) is cause in PPPoE, the gateway doesn't necessarily have to be on the same subnet, so you can still get a public IP and have a gateway IP address which is from a private range.

So just wanted to confirm that.

Luckily for me in Kerala, I still get assigned a public IP address which is same as the externally visible IP address.
 

varkey

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Found a screenshot.
IP Address: 10.91.144.x
Gateway: 10.91.144.x

Public IP: 117.xxx.xxx.xx

Don’t know if it’s CGNAT but this is what I had back in April.
Btw are you sure thats the internet WAN interface? Cause it looks similar to the VOIP WAN IP ranges and that indeed uses the 10.x.x.x range.
 
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