ISP IPv6 DNS Still passing to devices

[dudusmaximus]

The past few updates I've noticed that my ISPs IPv6 DNS address is still getting passed to my devices even with get DNS automatically turned off under the IPv6 section and DNS privacy turned on. I also have it set under my LAN devices to send the routers IP as the DNS section. So on my PC I'm seeing 3 DNS address under my ipconfig the routers IPv4 and IPv6 address and a single IPv6 address from my ISP. Just curious if anyone else is seeing this problem.

 

[Snoopotic]

yip same Problem here. Found you via TAG. maybe someone has an Idea how to solve that.

 

[Phil Outram]

You need to edit your dnsmasq.conf file located in /etc/ with the ipv6 address you want to use. I had the same problem and making the change here resolved it.

The line that you need to edit is:

dhcp-option=lan,option6:23,[::]

replace the :: with the ipv6 address you wish to use for dns

 

[dave14305]

From the dnsmasq man page:

For IPv6, [::] means "the global address of the machine running dnsmasq", whilst [fd00::] is replaced with the ULA, if it exists, and [fe80::] with the link-local address.

http://www.thekelleys.org.uk/dnsmasq/docs/dnsmasq-man.html

 

[Smokey613]

I have enabled/disabled IPv6 numerous times so I could “get with the future” of the internet. I have determined it works very well for it’s intended purpose of providing almost inexhaustible addresses and direct connections to the rest of the internet without the need for NAT. What I do not like is that last part. I still want more control over who my devices “talk” to and IPv6 is very good at defeating that. While I admit it is far more efficient at communication than IPv4 I have decided to stay in the dark ages with IPv4 as it makes my little corner of the internet more manageable for me.

 

[Phil Outram]

Sorry I made a mistake in my post above, forgot that changes to dnsmask.conf will be overwritten after a reboot.

You need to make a dnsmasq.postconf file and upload this to /jffs/scripts/ and then place the following into it:

#!/bin/sh
sed -i "s/dhcp-option=lan,option6:23,.*/dhcp-option=lan,option6:23,[insert ipv6 address here]/" $1