Airtel Fiber Port forwarding over IPv6

vivek.krishnan said:
Sad to see Airtel not using IPv6 natively, unlike Jio.
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How can we confirm whether the ISP uses IPv6 or not? Is checking with sites like whatismyipaddress or test-ipv6 enough to confirm it?
I recently got my Airtel Xstream fiber connection and these sites are reporting that I have IPv6 support.

I have no idea what benefit it offers to me if it supports IPv6, though that is a topic for some other thread. :P
 
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Ipv6 address, plus connectivity to ipv6 sites is enough to check if you have ipv6.

Now coming to why ipv6 is important : with ipv4, ISPs have a limited number of addresses (4 billion in total), which were enough in 1990s, but we ran out of addresses in the last decade. Therefore, ISPs have used CG-NAT to share the same address to 100s if not 1000s of customers. Most people don't care about it, but they way internet is designed is everybody is reachable to everybody else. Now, you can reach company X's servers, but unless you have a initiated a conversation with the server, the server cannot reach you on your ipv4 address because the same public ipv4 address is shared by 1000s of users in CGNAT. Practically, it means, if only have a CGNAT ipv4, you cannot host any service that others can reach from the internet (Tunnels, Tailscale, and cloudflared not withstanding). With ipv6, there are simply so many addresses to give out, that every device gets its own (even multiple) public ipv6 addresses. It all depends on your use case for internet, and whether the devices you have are secured enough to be let into the internet. Most ISPs should give dual stack internet and let the customers decide how to use their access to internet.

EDIT: the comment I was replying to was removed, so this may appear as out of context.
 
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privateer said:
Ipv6 address, plus connectivity to ipv6 sites is enough to check if you have ipv6.

Now coming to why ipv6 is important : with ipv4, ISPs have a limited number of addresses (4 billion in total), which were enough in 1990s, but we ran out of addresses in the last decade. Therefore, ISPs have used CG-NAT to share the same address to 100s if not 1000s of customers. Most people don't care about it, but they way internet is designed is everybody is reachable to everybody else. Now, you can reach company X's servers, but unless you have a initiated a conversation with the server, the server cannot reach you on your ipv4 address because the same public ipv4 address is shared by 1000s of users in CGNAT. Practically, it means, if only have a CGNAT ipv4, you cannot host any service that others can reach from the internet (Tunnels, Tailscale, and cloudflared not withstanding). With ipv6, there are simply so many addresses to give out, that every device gets its own (even multiple) public ipv6 addresses. It all depends on your use case for internet, and whether the devices you have are secured enough to be let into the internet. Most ISPs should give dual stack internet and let the customers decide how to use their access to internet.

EDIT: the comment I was replying to was removed, so this may appear as out of context.
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Hmm so how does fast paced fps game servers work ? Since the player is using cgnat and obviously unreachable?
 
captivating said:
Hmm so how does fast paced fps game servers work ? Since the player is using cgnat and obviously unreachable?
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Can't speak for all FPS games, but you'd only notice it, if the game needs p2p connections, or you are hosting the game server. Some games might work with ipv4 only. most online games have a central server with a public ip to which you'd initiate a connection first, then a reply from that server can reach you even if you happen to be behind CGNAT.
 
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mayank0623 said:
My troubleshooting skills end at asking chatgpt for a list of possible solutions and then trying them out one by one till the issue is fixed:laughing: I wasn't able to see an ipv6 on test-ipv6 without switching to Google dns on my ethernet adapter though, now that it's working I'm not touching any of the network set-up
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I have achieved this RDP from internet. But still i want help on getting my samba share (USB attached to airtel router) to be accessible from internet. i will be attaching a 2tb hdd afterwards.
i am not able to ping my routers ipv6 address from internet. but able to ping my RDP host.

​
WAN Information:
- Wan Name:Internet
- Encapsulation:PPPoE
- IPv6/IPv4 Dual StackDualStack
- PPP User Name
- MAC Address:hidden
- IP Address : :
- IP Subnet Mask : :255.255.255.255
- Default Gateway:10.240.8.56
- Primary DNS:117.96.122.139
- Secondary DNS:59.144.127.17
- IPv6 Global IP:
- IPv6 Prefix Length:64
- IPv6 Gateway:fe80::b6f9:5dff:fee7:a3e5
- IPv6 WAN DNS1:2401:4900:50:9::290
- IPv6 WAN DNS2:2401:4900:50:9::7d5
- Link-Local Address:fe80::6e4f:89ff:feb8:656a
- Wan Name:VoIP
- Encapsulation:ENET ENCAP
- IPv6/IPv4 Dual StackIPv4
- MAC Address:hidden
- IP Address : :
- IP Subnet Mask : :255.255.254.0
- Default Gateway:10.191.38.1


​
LAN Information:
- IP Address : :192.168.1.1
- IP Subnet Mask : :255.255.255.0
- DHCP:Server
- IPv6 Address:
- Link-Local IPv6 Address:fe80::6e4f:89ff:feb8:6569
- IPv6 Prefix:2401:4900:8fca:440c::
- Preferred/Valid Time(sec):86400/86400
- DHCPv6:Enabled
- Radvd State:Enabled
- IPv6 LAN DNS1 :2401:4900:50:9::290
- IPv6 LAN DNS2 :2401:4900:50:9::7d5

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I just raised a request to allow me to edit my dns in router, but they told you have to purchase static ip to do so. Can they lock dns in my router?
Please help.
i was thinking like if the dns can be changed then ipv6 of my router can be pinged from outside.
 
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