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Questions tagged [ipv6]

Questions about IPv6, the newest version of the Internet Protocol. This tag should be used when asking about personal/home network IPv6 addressing, or basic IPv6 knowledge. Questions related to company-grade IPv6 networks are off-topic and should be asked on Network engineering SE.

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Is there anyway to disallow accessing local network devices through global IPv6 addresses in linux?

I realize that this question might sound kind of strange, but it is necessary for my situation as far as I can tell. The root of it is that my ISP assigns IPv6 global addresses dynamically and ...
Nik Tedig's user avatar
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10 views

How to set up IPv6 NAT in libvirt open forwarding mode?

libvirt can do IPv6 NAT by itself in NAT forwarding mode if you give it the ipv6='yes' attribute. But that adds a bunch of firewall rules and I don't want it mucking up my already existing firewall ...
Nik Tedig's user avatar
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24 views

How to automatically assign proper IP addresses in libvirt network

Trying to make a virtual network that contains a single VM. Packets are routed through the host with <forward mode="route" />. I've read a bunch of stuff online and AFAIK it comes down ...
Nik Tedig's user avatar
  • 121
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0 answers
26 views

Understanding DNS IPv6 result using dnsmasq

I'm new to IPv6. I've redirected a domain to 0.0.0.0 on dnsmasq DNS server like so: address=/domain.com/0.0.0.0 when I use nslookup on this domain using my DNS server I get the following result: ...
Dinamo's user avatar
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1 answer
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If both RA and DHCPv6 provide DNS servers, which one would devices use?

I use a home router that also has a DNS server that forwards to the ISP DNS servers and caches them. But I don't want to use ISP DNS servers, so I configured the router's DHCP and DHCPv6 server to ...
huupoke12's user avatar
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0 answers
64 views

Setting up reverse DNS for home email server with IPv6 on Linux Ubuntu 22.04 or Debian

I'm trying to set up an email server at home using Ubuntu 22.04 and IPv6. I would like to configure a reverse DNS for my IPv6 address to ensure reliable email delivery. I've followed this guide to set ...
Felipe S's user avatar
4 votes
0 answers
455 views

Is there a simple way to get per-protocol (i.e. IPv4/IPv6) statistics from netstat?

After a change of ISP, I've recently gotten IPv6 access, so I thought I'd play around a little with netstat to see if it's possible to get some kind of high-level per-protocol statistics from macOS ...
gmw's user avatar
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140 views

Ubuntu 22.04 receives an IPv6 address under the same Wi-Fi router but is unable to access IPv6 websites, while Windows 10 behaves correctly

In my office network, I have a TP-LINK wifi router. All the ipv4 network works quite well. In the setting of the ipv6 in the wifi router, it is set as the "bridged" or "pass through&...
ollydbg23's user avatar
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0 answers
26 views

IPv6 clients only ask for DHCPv6 addresses on FE80

Why would IPv6 clients only ask for DHCPv6 addresses on FE80:: (link-local unicast)? Autoconfigured addresses are fine (on 2001:4341:360:65::/64 as expected). Have I screwed up my radvd.conf (below; ...
Drew Derbyshire's user avatar
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56 views

Change Hyper-V IPv6Connectivity

I am trying to test IPv6 on a Hyper-V VM instance in Windows 10. IPv6 is enabled on my network, and working on my host machine (e.g, ping -6 ipv6.google.com is fine). However, in my VM, ping -6 does ...
shea's user avatar
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1 answer
110 views

How to use (local) ipv6 address as dns server

I want to use a raspberry pi as ipv6 dns server for local (LAN) use. I would then make it known in the router (Fritz!Box) for which I’d need the pi’s ipv6 address. Problem: this ip address keeps ...
hk1020's user avatar
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0 answers
26 views

Is there an option in Windows 10/11 to prefer similar IPv6 source address for outbound connections?

I have a multihoming setup with 2 IPv6 GUAs on the same interface, each from a different ISP. My edge router does source-based policy routing, so is there a way to tell Windows to use the same ISP (...
spot's user avatar
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IPv6 routes mysteriously disappearing on Linux

I have a complex routing setup involving an IPv6 /64 routed over Wireguard. Both ends of the wg tunnel are configured as routers (forwarding=1) and not running any automated network device management (...
R.. GitHub STOP HELPING ICE's user avatar
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1 answer
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Minecraft Server doesn't let others connect when running the .jar using java (instead of javaw)

I'm running a small Minecraft server using ipv6. The relevant port has been forwarded in both the firewall and the router. My friends are able to connect to the server correctly, BUT ONLY if the file ...
Aze0n's user avatar
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47 views

Windows Firewall on WS2016 doesn't accept IPv6 loopback IP

I came to a problem when Windows Firewall on Windows Server 2016 is unable to set IPv6 loopback address to an inbound rule - Scope - Local IP address. The error is: An error occurred while verifying ...
Mi1anovic's user avatar
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0 answers
77 views

Static Private IPv6 Address SLAAC RFC 7217 on Windows 11

I have a LTE ISP that give me a /64 IPv6 prefix that changes every 4 hours. I would like to set a Static SLAAC suffix in order to set Firewall rules on the router using negative netmask. I read online ...
SuperMitic's user avatar
0 votes
0 answers
29 views

No DNS AAAA response from Fortigate

I've tried to setup IPv6 only home lan, but DNS seems to not work as expected. To enable NAT64 I had to change public DNS servers to my firewall (which is preffered option anyway). I'm using Fortigate ...
Jan Zahradník's user avatar
1 vote
1 answer
131 views

How can I tell ssh to connect using the non-temporary IPv6 address?

IPv6 interfaces (with routable IPs at least) usually have a temporary IP address, which changes frequently and is normally used for outbound connections in order to provide more privacy. How can I ...
Julien Oster's user avatar
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0 answers
63 views

ipv6 - how to make network hosts ignore advertised DNS

On my home network I have: Router provided by my ISP. DHCP server switched off in its configuration Raspberry Pi, running dnsmasq (among other things), providing DHCP and DNS servers. The Raspberry ...
DeskHippo's user avatar
0 votes
1 answer
113 views

Pihole in a IPv6 setup: How to reliable distinguish certain clients for them to be grouped?

In my local home network, I want to have IPv4 and IPv6. I want to use my pihole as primary DNS. I furthermore want to group clients so that certain devices can bypass the blocklist and issue their ...
k0pernikus's user avatar
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Can I autoconfigure both interfaces as slaac (accept_ra 1) on a non-router device?

Need clarification to the following statement Also, due to restrictions in the IPv6 specification, it is not recommended to autoconfigure a host with multiple external interfaces (like 2 ethernet ...
Marinela's user avatar
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0 answers
61 views

Cannot access PC from Internet via IPv6

I am trying to make my computer accessible from the internet for SSH via IPv6. Unfortunately, nothing I tried so far has worked: The PC is running Windows 11, 23H2 I can use the IPv6 address (from ...
Lukas Lang's user avatar
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0 answers
31 views

ICMPv6 Windows Firewall

I've added a simple custom incoming rule in my Windows 10's Firewall to allow all ICMPv6 packets without any limitation, but still https://ipv6-test.com/ reports as filtered. If I disable the firewall,...
roughnecks's user avatar
0 votes
1 answer
78 views

How set the public IPv6 on my Ubuntu Server 22 on Raspberry Pi?

I'm new to IPv6 stack, still got lot to learn about it. I got attracted to it when realized I could run my devices NATless and host a small server even with a home router. When I run ipconfig on ...
Douglas Ferreira's user avatar
0 votes
0 answers
81 views

Make Linux automatically determine whether to use SLAAC or DHCPv6

I'm setting up my Debian router. Depending on where I put my router, I need to use either SLAAC or DHCPv6 to get an IPv6 Address (and I need them both because I am not sure whether I'll need to use ...
Ajax's user avatar
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1 vote
1 answer
84 views

How to utilize an IPv6 address on Windows Server for a service

I have a Windows Server at a data center which has a range of IPv6 addresses, for example 2000:5300:120:e5e:: (not real address) with 64 entered in the Subnet Prefix Length. I want to bind one of the ...
Ross's user avatar
  • 23
1 vote
2 answers
113 views

Why does ipv6 default route disappear on Windows?

Initially when ipv6 is enabled everything works as expected: Enable-NetAdapterBinding eth0 -ComponentID ms_tcpip6 Get-NetRoute -InterfaceAlias eth0 -AddressFamily IPv6 ifIndex DestinationPrefix ...
Konstantin Glukhov's user avatar
0 votes
1 answer
166 views

strange extra IP IPv6 addresses

My local network runs IPv4 and IPv6. The IPv6 is mostly experimental, as my internet service provider uses IPv4. I'm running DHCP for IPv6 on a W2K8R2 server. Several computers on my LAN have IPv6 ...
William's user avatar
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1 vote
0 answers
446 views

How to prevent dnsmasq from creating AAAA records for hosts using DHCPv6?

I have a dual stack (V4+V6) internal network with dnsmasq providing DNS, DHCP, and DHCPv6 services. I want to use ipv4 for most of my internal host to host communications, so I don't want dnsmasq to ...
Señor Quack's user avatar
0 votes
1 answer
374 views

How to get Starlink to work with an OpenVPN server

I moved and my only option for decent internet is Starlink, which is behind a CGNAT. I don't have a lot of experience with getting around it. Hoping to get some advice or to know what the best way to ...
Spacefigher's user avatar
0 votes
1 answer
55 views

hide output of nmcli network command

I want to hide output of nmcli network on, but the command insists on outputing to screen. > sudo nmcli network off && sudo nmcli network on >/dev/null 2>&1 IPv6: ADDRCONF(NETDEV ...
Kymo Wang's user avatar
  • 103
0 votes
1 answer
219 views

How do I access the "permanent" IPv6 address?

In Windows 11 (same as 10 I think), the command ipconfig gives something like this Connection-specific DNS Suffix . : lan IPv6 Address. . . . . . . . . . . : ...:5c69 Temporary IPv6 Address. ...
Earth Engine's user avatar
4 votes
1 answer
811 views

Why does peer-discovery work for IPv6 but not IPv4?

I'm building a peer-to-peer protocol where nodes advertise the existence of other nodes by sharing the IP addresses they are connected to. This functionality is called "peer-discovery". One ...
Thorkil Værge's user avatar
0 votes
0 answers
114 views

systemd-networkd: Updating statically assigned ipv6 prefix

I want to be able to change my statically assigned ipv6 address prefix in my systemd-networkd configuration file without rebooting my entire system. For example if I entered the following in a file /...
user184419's user avatar
0 votes
1 answer
89 views

IPv6 routing with multiple interfaces

I have a linux server with two NICs and IPSec (Libreswan) installed. I have two networks that should get routed through VPN, but it works only one of the networks. So far I could debug that for the ...
ciis0's user avatar
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0 votes
0 answers
112 views

Wireguard causing Bonjour to fail

I rely on the following Wireguard VPN to gain IPv6 access on a Windows PC [Interface] PrivateKey = <private-key> Address = fd24:609a:6c18::2/64 [Peer] PublicKey = <public-key> AllowedIPs =...
ZhangTianrong's user avatar
4 votes
1 answer
1k views

How to configure VirtualBox NAT network with IPv6?

I am running an externally-acessible server inside a VM. My local router is configured to use DDS to map my IP address to a domain I own and to forward packets to ports 80 and 443 to my Windows PC. ...
Sergiy Belozorov's user avatar
0 votes
2 answers
686 views

How to remote access CCTV's device behind CGNAT for IPv4, and device doesn't have support for DDNS IPv6?

This question was originally asked in networkengineering.stackexchange and suggested to be moved here. TL;DR Multiple locations with local CCTV. How to remote access all of them, with an ISP that ...
Justcurious's user avatar
0 votes
0 answers
55 views

Setting a WiFi router as WiFi extender (Only IPv6 working)

I am planning to use an old WiFi router as a WiFi extender I have configured everything on the router. The DHCP server is off, channel mode is set to bridged and Universal Repeater Mode is enabled. ...
Adithyan S.M's user avatar
1 vote
0 answers
110 views

IPv6 hotspot on RPi with NetworkManager

I try to create WiFi hotspot on Raspberry OS (Bookworm) with NetworkManager. The basic tutorial https://raspberrytips.com/access-point-setup-raspberry-pi/ helped - I've got IPv4 hotspot which shares ...
Dmytro's user avatar
  • 111
0 votes
0 answers
193 views

ipv6 problems in linux - slow to not connection problems

I have experienced slow to not connections due to ipv6. However, I like to understand why the problem persists in linux for ipv6. It is hung on ipv6 ping -4 google.com PING (142.250.187.110) 56(84) ...
Estatistics's user avatar
0 votes
0 answers
66 views

My IPV6 changed without restarting router

This morning, I connected my iPhone to my home wifi; I checked IPV4 and IPV6. Everything looked OK. I used my phone for about an hour, but when I rechecked IPV4 and IPV6, IPV4 was still the same, but ...
Zen Suto's user avatar
0 votes
1 answer
709 views

How to resolve issues with IPv6 via PPPoE

I am facing issues that I cannot wrap my head around related to IPv6 and PPPoE connections. I have a server connected to a Netgear router with WAN connected to ISP and server connected to LAN port. I ...
Anirban's user avatar
  • 131
0 votes
1 answer
201 views

connecting to VPN server w/IPv6 address from client with IPv4

I'm a migratory bird with three locations. Each has an OpenVPN server with several uses: connect to devices on the LAN to update configs or troubleshoot, present a 'home' IP when making a purchase (...
Stewart's user avatar
0 votes
0 answers
85 views

Sending DHCPv6 vendor options via dhcpd (isc-dhcp-server) and receiving via systemd-networkd DHCPv6 client

I am trying to send DHCPv6 vendor options via Dhcpd in dhcpd6.conf option space FOO; option FOO.url code 1 = text; subnet6 <IPV6>::/64 { range6 <START_RANGE>::2 <END_RANGE>::6; ...
kpn's user avatar
  • 1
1 vote
1 answer
153 views

Two ULA addresses on one interface

I have a raspberry connected to an OpenWrt IPv4/IPv6 router. As you can see below, on the eth1 interface I get two ULA addresses: fd00::1f0/128 and fd00::27d5:6387:c8e5:3b1a/64 On the router, the fd00:...
NickG's user avatar
  • 121
2 votes
1 answer
298 views

IPv6 and Privacy Extensions in Linux not working as expected with dhcpv6

I'm trying to setup my desktop to generate and use temporary address for IPv6, but no matter what I'm doing it is not working. My internet router is managed by my provider, so I can not influence the ...
trupf's user avatar
  • 31
0 votes
1 answer
194 views

Internet modem does not resolve resolve local IPV6 hosts, fixed: feature, not bug

I am having fun with creating some small Raspberry Pi web servers with IPv6. However, my Android phone cannot reach those, due to some DNS problem. Here is the situation. I registered a domain name ...
Roland's user avatar
  • 381
0 votes
1 answer
148 views

Domain DNS settings do not work behind DS-Lite connection

I would like to access my Raspberry from the internet which is provided to my FritzBox with a DS-Lite connection. After some struggle with IPv6 addresses I got it work through the MyFritz service ...
Cilenco's user avatar
  • 101
-1 votes
1 answer
881 views

Is using WireGuard keep-alive feature going to create issues when connected for long time?

My ISP uses symmetric CGNAT. So, for connecting to my WireGuard server over IPv4, I am using a persistent keep-alive settings of 25 seconds on my client to allow incoming connections. Is this okay? Or ...
theOne2023's user avatar

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