Posted: Sat Mar 25, 2023 20:56 Post subject: Getting IPv6+IPv4 to work correctly with SmartDNS (EA8500)
Linksys EA8500, fw version: DD-WRT v3.0-r49838 std (08/23/22) (on both partitions, cleanly installed) [Using this fw because it's recommended by MRJCD on his site even though it's fairly dated.]
Settings:
Basic Setup:
Ignore WAN DNS checked.
Static DNS leases all zeros.
Use dnsmasq for DNS UNchecked (required for SmartDNS to work)
only box checked in this area is: DHCP-Authoritative
NTP Client settings - Client enabled
Server IP / Name: left blank since fw will automatically provide
___________________
IPv6 Tab
Type: DHCPv6 with Prefix Delegation
Prefix Length: 64
Static DNS 1: 2620:fe::fe
Static DNS 2: 2620:fe::9
MTU: 1472 (is this ok or is it always supposed to be left on the default value?)
ALL DHCPv6 options and radvd are Disabled.
__________________
Services tab:
DHCP Server Setup
Used Domain: LAN/WLAN
LAN Domain: home
Additional Options: blank in this section
__________________
SmartDNS Resolver
ALL options enabled in this section
Additional options:
local=/home/
expand-hosts
dhcp-range=::1000,::FFFF,constructor:br0,ra-stateless,ra-names,12h
dhcp-option=option6:dns-server,[::]
interface=br0
ra-param=br0,10,300
enable-ra
domain-needed
bogus-priv
no-poll
no-negcache
filterwin2k
no-resolv
_______________________
A power cycle/reboot of both the modem and router were done after all these settings were put in.
Now, there is what appears partial functionality, (some sites show everything is fine, others do not) as well as some weirdness with regular browsing, like it's taking a lot longer to resolve certain sites.
1st off, test at: https://test-ipv6.com/ says: "Your readiness score 10/10 for your IPv6 stability and readiness, when publishers are forced to go IPv6 only."
test data:
"Test with IPv4 DNS record
ok (0.501s) using ipv4
Test with IPv6 DNS record
ok (0.578s) using ipv6
Test with Dual Stack DNS record
ok (0.453s) using ipv6
Test for Dual Stack DNS and large packet
ok (0.403s) using ipv6
Test IPv6 large packet
ok (1.519s) using ipv6
Test if your ISP's DNS server uses IPv6
ok (0.418s) using ipv6
Find IPv4 Service Provider
ok (0.470s) using ipv4 ASN 33588
Find IPv6 Service Provider
ok (0.565s) using ipv6 ASN 33588"
____________________________________
Connection test at: https://internet.nl/ shows 100%, all green results (tested multiple times)
Bizarrely it shows that "[b]IPv4 Not supported[/b]" under IPv4 connectivity.
All browser filters/addons were disabled before these tests were run.
Using a different browser (Opera) with the same above address has different results for some reason:
This site: https://ip6.nl/#! Shows both IPv4 and IPv6, with only IPv6 with a green checkmark on it and IPv4 in Gray with no check (but it shows the public IP).
If I have any incorrect, unnecessary or un-optimized settings, or do not have something that I should in additional dnsmasq options, please let me know. Thanks in advance.