Jio 4G - Strange public IPv4 address assigned behind NAT

varkey

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2,259
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Bangalore | Ernakulam
ISP
Excitel | BSNL
Btw the main issue or anomaly with Jio remains, still getting assigned strange public IP addresses 🤷‍♂️

Code:
[email protected]:~# ip address show eth0.2
8: [email protected]: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether xx:xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
    inet 10.0.1.10/24 brd 10.0.1.255 scope global eth0.2
       valid_lft forever preferred_lft forever
    inet 25.44.192.226/30 brd 25.44.192.227 scope global eth0.2
       valid_lft forever preferred_lft forever
    inet6 fe80::290:a9ff:fe05:a0d5/64 scope link
       valid_lft forever preferred_lft forever
[email protected]:~#
 

varkey

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Bangalore | Ernakulam
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Excitel | BSNL
It appears Jio is not the first one to do this. Apparently T-Mobile and others have done it in the past or maybe even now. Found many articles while browsing. 🤷‍♂️

 
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varkey

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Bangalore | Ernakulam
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Excitel | BSNL
Did they run out of the 10.0.0.0/8 subnet perhaps, that they had to borrow public IP address to use in their private network! :p ;) 🤣 Jk
Although I joked about it earlier, it looks like this is the case. The 10.0.0.0/8 private subnet has about 1.6 crore IP addresses, that's probably not enough for Jio with the number of users on their network, and is forced to make use of the other IP spaces which are un-used.

The 25.0.0.0/8 or the 56.0.0.0/8 IP ranges even though owned by other organisations are not active on the internet ie not announced over BGP at all.
 


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JB700

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449
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Delhi
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Tripleplay
Why are they using these ranges when they could use 100.0.0.0/8 or 172.16.0.0/12 ?
 

varkey

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Bangalore | Ernakulam
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Excitel | BSNL
Its only a 100.64.0.0/10 actually. That gives only 41 lack IP addresses, and the 172.16.0.0./12 would give about 10 lakh.

Probably not enough the way they have their network setup? 🤷‍♂️
 

elepton

Regular
Messages
172
ISP
Level 3
Probably not enough the way they have their network setup? 🤷‍♂️
True. Of course they could change their network addressing by moving to 464XLAT. It can provide IPv4 connectivity over an IPv6-only bearer. That would free up millions of IPv4 addresses being used by Android phones.
 


elepton

Regular
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172
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Level 3
So I don't think it actually does a PPP connection, and appears to be something based on QMI/MBIM. Since it doesn't do PPP, I guess it is possible for QMI/MBIM to support non ppp type setups? PPP as you rightly said doesn't care of the subnet, and the gateway can be from any subnet for that matter.
3GPP data bearers (i.e. the interface between modem and network) are always point-to-point links to the gateway. This is not based on the PPP protocol. It is setup and controlled by LTE signalling.

The interface between the modem and the host can be QMI or MBIM or USB CDC NCM or AT/PPP or any other protocol.
 

devangpatel

Member
Messages
22
Location
Maharashtra
ISP
Vodafone & Jio
Jio is having double NAT (CG NAT) behind us. Due to which I was not able to port forward my ip camera for remote live view. I called them twice and finally the network team told me they can't help with it. So I shifted my ip cameras to local isp who only charges rs 400 per month with static ip.

Do anyone know any way to enable port forwarding for Jio. (I am using Jio sim in JioFi). My area still does not get Jio Fibre 😬.
I also made port forwarding setting in the JioFi but Open Port Check Tool -- Verify Port Forwarding on Your Router shows the that port 80 is blocked which is required by Hik-Vision NVR for live view.
 

devangpatel

Member
Messages
22
Location
Maharashtra
ISP
Vodafone & Jio
@vignesh_venkatesan you can port forward on 4G connection. I have done for my Vodafone corporate connection (you get a new m2m sim) , you need to speak to your customer relational manager or mail [email protected] , But for Jio I tried calling and also mailed them but they said this service is not available for Jio 4G customer, they suggested me to get Jio Fibre which unfortunately not available in my area.

PS. Also they charged extra for the m2m sim and also gave static ip.
 
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