IPV6 Acess via sim

[battlecat]

Hello,

I’m trying to access a device via IPV6. My RUT240 has only a simcard for internet. It gets an IPV6 address from the service provider.

I’ve played around with the firewall rules but can’t access the local device remotely via the RUT240’s mobile connection.

However, I CAN access it via my home internets CGNAT connection. (I’ve configured my home modems firewall to allow this.)

Can someone please help me configuring the Teltonika?

Thanks!

[flebourse]

Hello,

Having a public IPv6 address doesn’t guarantee that the provider will forward incoming traffic to the RUT (it doesn’t, probably) so the router will not be reachable from the outside.

To check this, do a:

tcpdump -i qmimux0 -n -v icmp6

on the RUT and a ping6 IPv6-addr-of-the-RUT from the outside.
My bet is that the tcpdump will not show any incoming icmp6 echo request.

Regards,

[battlecat]

Thanks for the reply.

How do I find the IPV6 address of the Teltonika?

The modem only has 3 options, NAT, bridge and passthrough. Its currently on NAT.

Cheers

[flebourse]

Execute a ifconfig or ip -6 addr show.
Should be a “2axx:…” or similar, ignore the “fe80:…” one.