Why is there private ip address in place of default gateway ip?

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WATER_the_life

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Below was trace of google.com few months ago.

1 <1 ms 1 ms <1 ms Home [192.168.1.1]
2 34 ms 33 ms 32 ms 117.215.x.x
3 36 ms 35 ms 33 ms 218.248.170.118
4 42 ms * 48 ms 218.248.235.197
5 * 42 ms 40 ms 218.248.235.198
6 42 ms 42 ms 41 ms 74.125.48.138
7 42 ms * 44 ms 108.170.248.177
8 42 ms 41 ms 40 ms 209.85.251.29
9 41 ms 40 ms 41 ms google.com [216.58.203.142]

2nd row represent default gateway ip which match assign ip (117.215.x.x.)

Below is my current trace of google.com

1 1 ms <1 ms <1 ms Home [192.168.1.1]
2 30 ms 30 ms 34 ms 10.217.x.x
3 31 ms 31 ms 32 ms 218.248.101.30
4 35 ms 34 ms 35 ms 218.248.235.197
5 35 ms * * 218.248.235.198
6 37 ms 38 ms 37 ms 74.125.48.138
7 * * * Request timed out.
8 37 ms 37 ms 37 ms 209.85.246.4
9 35 ms 35 ms 35 ms 108.170.248.219
10 64 ms 60 ms 59 ms 209.85.251.95
11 63 ms 63 ms 64 ms 74.125.242.145
12 68 ms 66 ms 66 ms 74.125.252.209
13 60 ms 61 ms 61 ms maa05s09-in-f14.1e100.net [172.217.166.110]

My ip is 117.215.x.x. So default gateway ip must be 117.215.x.x. But it is private range ip 10.217.x.x.

Even though dynamic ip in different range like 59.x.x.x , 61.x.x.x default gateway ip is remain same.

Does someone snooping?

Can someone explain this?
 
Tracert will show all servers/routers in between yr computer and domain server
 
I am not sure exactly, but my guess is that the gateway has multiple interfaces and it shows the IP address of the interface the traffic exits, this need not be the same as the IP address of the gateway on your side.

Secondly in a point to point link, the gateway IP address need not be on the same subnet at all. This page has more details on it -- How would a router with /32 WAN subnet mask communicate with the rest of the Internet?

Perhaps BSNL made some changes to their network infrastructure recently which caused this, however there is nothing to worry and this is working as designed. I am on FTTH and I see the same behaviour.
 
varkey thank you,

May be you are right about BSNL infrastructure change.

As you told there is nothing to worry. Ok fine🙂

But it increase latency and the day it get private ip , iam unable to see real time data usage on this link http://172.30.139.25:9090/ssssportal/

this link give me "Location not found using Framed IP Address ".

already told JTO about this , he answerd i am first to concern about this and really do not know this thing.

already searched it in BSNL BROADBAND thread but find nothing.

i remember in one of thread somebody comping that he/she also not able to see real time data usage .
 
varkey, i tried your link . it's response is "user profile not found" . I think it is for FTTH user.

Also read your conversation with BSNL and Jyothish Kumar @ blacklightpyon twitter. It is good that your complain solved.

Here, I request to BSNL Broadband users if possible please share trace of google dot com.

For Whom who does not know how to.

Steps to perform trace. Click on Microsoft Start Button. -->Type CMD. -->Click on cmd dot exe -->Write tracert google dot com. --> Enter .
 

Something definitely changed for ADSL users. I also get a private gateway IP now.

Code: 
  1    <1 ms    <1 ms    <1 ms  erx
  2    16 ms    15 ms    16 ms  10.208.120.1
  3    17 ms    29 ms    18 ms  static.ill.218.248.61.122/24.bsnl.in [218.248.61.122]
  4    18 ms    18 ms    17 ms  218.248.235.161
  5    55 ms     *        *     218.248.235.162
  6    32 ms    33 ms    36 ms  72.14.195.21
  7    26 ms    30 ms    36 ms  74.125.242.145
  8    44 ms    48 ms    38 ms  216.239.54.159
  9    57 ms    57 ms    56 ms  maa05s10-in-f3.1e100.net [216.58.200.131]

However, nothing's changed as far as public IP is concerned. Still get a /32 assigned on my PPPoE interface so forwarding et all work as usual.
 
varkey , read the following link article

How to check if the ISP uses Carrier-grade NAT (CGN) | Remoterig.com,

As per my and AgentX trace results it shows private ip 10.x.x.x range so i conclude it but i am not expert so may be i am wrong , i am just curious to know change BSNL made . I haven't tested port forwarding as of now ,i may be wrong on port forwarding also.My real concern is real time data usage. BSNL officer told your internet is working so why do you go deep, in-place of solve it.So just trying to find solution by help of this forum.
 
WATER_the_life said:
Thank you @vignesh_venkatesa to point in right direction. It is CGN . Now it is confirmed that BSNL using CGN because of less IPv4 addresses.

@varkey Thank you .You are right it is routing but it need more effort to do port forwarding.

Thank you @AgentX for trace result if possible check this link http://172.30.139.25:9090/ssssportal/ , is it show real time data usage ?
Click to expand...

Port forwarding continues to work for me, this is not CG NAT. They're using private IPs for gateways only - you still get a fully routable public IPv4.

I can't get real-time data usage to work - it never worked for me though.
 

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