Airtel Fiber Port forwarding over IPv6

[mayank0623]

I have the basic Airtel Fiber 499 plan in Pune. I wanted to forward port 3389 but my IPv4 address is behind CGNAT, and I thought since the IPv6 address is public that would be possible, but it's not reachable from outside the home network. I emailed Airtel support, and the technician called me and told me port forwarding is not possible without buying a static IP, but with a public IPv6 address that should not be the case. Has anyone successfully forwarded ports on their default airtel ont without getting a static IP? I don't want to pay an additional 200-300 per month for that, so I'm temporarily using Tailscale but I want faster speeds.

 

[jayanttyagi]

Just allow inbound connections in firewall? No need to port forward if router gets assigned ipv6.

 

[superczar]

I have the basic Airtel Fiber 499 plan in Pune. I wanted to forward port 3389 but my IPv4 address is behind CGNAT, and I thought since the IPv6 address is public that would be possible, but it's not reachable from outside the home network. I emailed Airtel support, and the technician called me and told me port forwarding is not possible without buying a static IP, but with a public IPv6 address that should not be the case. Has anyone successfully forwarded ports on their default airtel ont without getting a static IP? I don't want to pay an additional 200-300 per month for that, so I'm temporarily using Tailscale but I want faster speeds.

you can forward ipv4 on airtel without static ip with the exception of 80, 443.
these 2 ports are available only on static ip plans

ipv6 without a proper firewall doesnt need port forwarding - you can access your client devices directly from the WAN side without any further setup since consumer grade routers dont have a ipv6 firewall to begin with

 

[mayank0623]

Just allow inbound connections in firewall? No need to port forward if router gets assigned ipv6.

I've turned off both router and windows firewalls but still have pings from outside timing out

you can forward ipv4 on airtel without static ip with the exception of 80, 443.
these 2 ports are available only on static ip plans

ipv6 without a proper firewall doesnt need port forwarding - you can access your client devices directly from the WAN side without any further setup since consumer grade routers dont have a ipv6 firewall to begin with

The IPv4 address in my router's dashboard and the IP address from https://whatismyipaddress.com/ are different, and I've tried port forwarding in the past and it worked but I'm no longer getting dynamic public ipv4

 

[DBot]

The IPv4 address in my router's dashboard and the IP address from https://whatismyipaddress.com/ are different

Based on this, I think your connection is NATted. You can’t do it without static IP or them opening up specific ports and forwarding traffic to your router. Your best bet is CloudFlare tunnels / Tailscale as you mentioned in your case.

I’ve tried with my ISP previously but none of my solutions worked, finally purchased static IP and used my own router.

 

[mayank0623]

Based on this, I think your connection is NATted. You can’t do it without static IP or them opening up specific ports and forwarding traffic to your router. Your best bet is CloudFlare tunnels / Tailscale as you mentioned in your case.

I’ve tried with my ISP previously but none of my solutions worked, finally purchased static IP and used my own router.

That's why I wanted to get IPv6 working, but it looks like it's behind some kind of NAT too, which is just stupid. I haven't looked into cloudflare tunnels yet, are their speeds faster than tailscale?

 

[superczar]

That's why I wanted to get IPv6 working, but it looks like it's behind some kind of NAT too, which is just stupid. I haven't looked into cloudflare tunnels yet, are their speeds faster than tailscale?

ipv6 on airtel does not use NAT - but may vary depending on location.
Jus check if your client devices are getting an ipv6 address and post it here (the starting numbers)
typically fe80 is link local only while public ipv6 (on airtel) starts with 2401:

 

[mayank0623]

ipv6 on airtel does not use NAT - but may vary depending on location.
Jus check if your client devices are getting an ipv6 address and post it here (the starting numbers)
typically fe80 is link local only while public ipv6 (on airtel) starts with 2401:

I'm definitely getting a public IPv6 as far as I can tell
From test-ipv6.com

From ipconfig /all