[clug] 4G internet

[Kathy Reid]

It's also worth checking the MTU of the interface.

I recently had a problem where I had to drop the MTU of my wlo1 
interface to 1100 from the default of 1500 while I was tethered to my 
phone, otherwise the packet loss would not let me ssh to a host while 
tethered. Once I dropped the MTU, ssh negotiation proceeded correctly.

Related:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1874257

Kind regards,

Kathy


On 12/7/20 4:24 pm, Bob Edwards via linux wrote:
> My strategy is to rent a VPS with a fixed IP (hosted in Sydney - I think
> you can get them in Canberra as well now - not sure how competitive the
> pricing is though) and then use OpenVPN. The clients (be they 4G, NBN
> or "free WiFi" etc.) then connect to my VPS and I connect to it from
> whereever I am to get to any/all ports I need.
>
> DigitalOcean have some good articles on setting up OpenVPN on various
> host OSs.
>
> In your case, the modem is getting a private IP (RFC1918) address from
> your ISP, but it is being NAT'd to a public IP address by the time that
> "whatsmyip" can see it - hence the two different IPs.
>
> cheers,
> Bob Edwards.
>
> On 11/7/20 7:39 pm, Adrian Blake via linux wrote:
>> Hi,
>> Not linux related but why can I not connect  to my devices remotely when
>> their router has only a 4G connection to the Internet, via Telstra.
>> whatismyip.com shows one IP address (1.129.???.???) and yet the modem
>> reports a different IP address (10.121.???.???), neither work.
>> I think I have correctly setup the port forwarding which I setup on a
>> different modem/router that used a wireless connection to the Internet.
>>
>> Adrian
>>
>