[GL-E750V2 (MUDI)] Kill-Switch also for DNS?

Routers VPN, DNS, Leaks
1

I have a question about my GL.iNet Mudi (mobile LTE router). It's about the kill switch. If i use the router to set up a VPN connection with Mullvad (preconfigured) and then activate the kill switch, does this also work for the DNS server? So will the connection be interrupted if the DNS server leaks?

The kill switch is there to ensure that my IP address is not leaked if the connection to the VPN server is interrupted. Does this also apply to the DNS?

Because when i activate Mullvad VPN i also have the DNS of Mullvad. Can someone explain to me whether Kill-Switch also protects against DNS leaks?

2

Hi,

The Kill-Switch is also protecting the DNS when the VPN server interrupted, so DNS will not leaks.

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3

Hello @bruce :blush:
Thanks for the feedback. And does it also work the other way? So the connection to the Internet is also interrupted if the DNS suddenly changes during the VPN connection?

For Example: I connect to the VPN from Mullvad.
IP is from Mullvad, DNS is from Mullvad.

Now the DNS suddenly changes during the VPN connection to the DNS of the ISP. Does the kill switch also work in this case and the connection is completely interrupted and blocked until I have Mullvad's DNS again?

4

For the LAN clients, yes.

Your understanding is correct.

5

Please keep in mind, @Maximal, that DNS is different from VPN.
So your PC can, of course, use any other DNS it would like to use.

VPN won't protect you against it. It will only make sure the DNS request will be served via VPN IP instead of your WAN IP.

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6

Thanks for your feedback @admon
It is important that the IP and DNS are not leaked. To prevent this, there is the VPN Kill Switch. As soon as the connection to the VPN server is interrupted, Internet access is immediately deactivated. This means that the IP address cannot be leaked. What is the best protection against a DNS leak?

When i activate the VPN connection in the GL E750V2 Mudi and then run a test, i have the IP and also the DNS of the VPN provider. Doesn't the kill switch also protect the DNS from leaks?

How can i reliably protect my DNS from a leak?

7

Does it make sense to change anything in the DNS settings? When i log into my Mudi interface, i see the following settings under Custom DNS Server:

DNS Settings
DNS Settings1298×839 62.5 KB

Is there anything i can do to protect my DNS?

8

Keep the default settings of the 'Custom DNS Server', the DNS traffic will be through the VPN tunnel.