Airtel Fiber Port forwarding over IPv6
- Thread starter mayank0623
- Start date
Jio gives IPv6 by default, Airtel apparently doesn't. I suppose their infra is still not IPv6 ready at scale.
bssunilreddy
Luminary
Then what about BSNL FTTH? Does they give IPv6 by default or should users request them to do?
mayank0623
Forerunner
It's possible airtel is rolling out IPv6 in phases. I have 2 airtel fiber connections in 2 tier 2 cities, both had ipv6 by default
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.
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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.
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.
captivating
Galvanizer
Hmm so how does fast paced fps game servers work ? Since the player is using cgnat and obviously unreachable?
My bad..! I deleted my reply wrongly. Happens when you have multiple TE tabs open and you are half asleep.
Undeleted the reply.
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.