# Speedport Smart 4 und IPv6

**URL:** <https://discourse.pi-hole.net/t/speedport-smart-4-und-ipv6/74650>\
**Category:** Deutschsprachige Hilfe\
**Created:** [December 20, 2024, 9:14pm UTC](https://discourse.pi-hole.net/t/speedport-smart-4-und-ipv6/74650 "2024-12-20T21:14:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![deHakkelaar](https://discourse-cdn.pi-hole.net/user_avatar/discourse.pi-hole.net/dehakkelaar/32/674_2.png) [@deHakkelaar](https://discourse.pi-hole.net/u/deHakkelaar)\
**Post date:** [December 21, 2024, 11:29pm UTC](https://discourse.pi-hole.net/t/speedport-smart-4-und-ipv6/74650/2 "2024-12-21T23:29:29Z")

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Have a read through below posting of mine:

> [@Pihole not blocking ads](https://discourse.pi-hole.net/t/pihole-not-blocking-ads/74286/11):
>
> I just now checked on my Samsung phone (Android 11) and cant find any settings either to disable IPv6 entirely or alter IPv6 DNS settings. Maybe I'm lookin at the wrong spot wink FYI, your router advertises IPv4 DNS server details via the [DHCP](https://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol) protocol: $ sudo pihole-FTL dhcp-discover Scanning all your interfaces for DHCP servers [..] dns-server: 10.0.0.2 And most likely the router advertises IPv6 DNS details via [IPv6 RA](https://datatracker.ietf.org/doc/html/rfc8106) (Router Advertisement): $ rdisc6 eth0 [..] Recursive DNS server …

If you have some IPv6 DNS settings on the router to play with, that **rdisc6** tool can come in handy.

> [@Insua](#):
>
> Reicht es, die lokale IPv6-Adresse, die mein Raspberry Pi bekommt, als DNS im Speedport zu hinterlegen, oder muss ich noch etwas anderes beachten?

Yes you can use the ones that the Pi constructed from the IPv6 RA advertised prefixes (shown with **rdisc** ) and SLAAC.  
There are usually three types of addresses, GUA, ULA and LLA.  
The boxes all the way at the bottom of below diagram:

> **[IPv6 Fundamentals: A Straightforward Approach to Understanding IPv6, 2nd Edition](https://www.oreilly.com/library/view/ipv6-fundamentals-a/9780134670584/ch05.html)**
>
> Chapter 5. Global Unicast Address Global unicast addresses (GUAs) are globally routable and reachable in the IPv6 Internet; they are equivalent to public IPv4 addresses. GUA... - Selection from IPv6 Fundamentals: A Straightforward Approach to...

Below one run on the Pi will show all currently configured IPv6 addresses (GUA, ULA and LLA) on all interfaces:

`ip -br -6 address`

Preferred one to be advertised as a DNS server is the ULA address (prefixes **fc00** , **fd00** etc).

But if one is lacking or cant be supplied by the router, you can select the LLA one ( **fe00** etc).  
LLA cant be routed though!

Better not advertise the GUA ( **2000::/3** ) for DNS to your clients bc the prefix for that one is under ISP control via deligation and can change and most often does change over time.  
Bit similar as your public IPv4 address can change without you having any control over it.

If you have a Windows, MacOS or Linux client, you can test connectivity with below one in a command/terminal window:

`nslookup pi.hole <RASPBERRYPI_IPV6_ADDRESS>`

Also have a read through below FAQ with some router settings examples:

> [@Use IPv6 ULA addresses for Pi-hole](https://discourse.pi-hole.net/t/use-ipv6-ula-addresses-for-pi-hole/2127):
>
> Many users have reported that frequently changing IPv6 addresses cause page load to be slow or even prevent from working at all. The issues can be fixed by updating the IPv6 address in /etc/pihole/setupVars.conf followed by a run of pihole -g. However, this solution turns out to be very inconvenient since it might be necessary to change the IPv6 address on a regular basis (maybe even multiple times a day). An alternative approach we are currently looking into is the usage of ULA addresses which…

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_[View the full topic](https://discourse.pi-hole.net/t/speedport-smart-4-und-ipv6/74650)._