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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15k views

Router is inaccessible, inexplicably giving IPv6 gateway

So I've been using this Router/Modem from my cable company for about a year now. I accidentally unplugged it earlier today, and now while I can access the Internet through a wired connection, my Wi-Fi ...
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No able to send required option(i.e. option 16) in dhcpv6 using client dhclient in Linux

I need to configure dhclient to send option 16 in solicit message. I have updated dhclient.conf file as follows send dhcp6.vendor-opts 00:10:00:0E:00:00:01:37:00:08; request dhcp6.fqdn, dhcp6.name-...
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1answer
5k views

Does Windows Firewall block ICMPv6 by default?

After a long struggle trying to establish IPv6 connectivity with Windows box (and failing) I noticed that Windows Firewall blocks a lot of ICMPv6 packets. Closest predefined rule I could find does ...
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IPV6 auto configuration not working in Ubuntu Natty

In Windows 7, my computer can automatically get a IPV6 global address and use IPV6 network, but in Ubuntu Natty, I can't find out how to let stateless configuration work. My network is a university ...
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macOS: Ping no response but ping6 working

I have a MacBook Pro 2015 running on macOS BigSur 11.1. The device is connected via wireless-lan to my router. The network is working with ipv4 and ipv6. The MacBook gets an ipv4 and an ipv6 address. ...
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1answer
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configure outgoing ipv6 with systemd-networkd

I have the following systemd-network config and want to set the outgoing ipv6 address: [Match] MACAddress=aa:bb:cc:dd:ee:ff [Network] DNS=2001:4860:4860::8888 DNS=2001:4860:4860::8844 Gateway=2a01:...
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How can I get windows to release an IPv6 address

I have a windows system with an IPv4 address and an IPv6 address and I'm trying to figure out how to release my IPv6 address. I've tried ipconfig /release6 and I get this error An error occurred ...
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1answer
19 views

Can I route DHCPv6 and Router-Advertisements through another router?

I have a dual router setup (two routers behind each other) and I want to get IPv6 working on my Local Network. ISP <-> Router_1 (Vodafone Station) <-> Router_2 (Unifi USG) <-> Local ...
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29 views

How to find temporary IPv6 addresses in Windows 10

I recently entered Ipconfig /all into my cmnd prompt to find something. Upon doing that I noticed that I don't have a LAN connected and I cant find my Temporary IPv6. Can anyone help figure how or why ...
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1answer
24 views

How does IPv6 DNS resolution work in a local network

I have a dualstack private network. My router is DHCP and DNS Server. All client IPv4 addresses are registered and can be queried by DNS as expected as their hostnames are registered with DHCP. Now ...
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How to enable outgoing IPv6 traffic on Google Compute Engine VMs?

In order to test the accessibility and inaccessibility of my home network from the outside world I'm using Google Cloud Platform VMs with Debian 10. In ifconfig I'm seeing one internface with an IPv4 ...
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1answer
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Why might someone be denied access to my website from a mobile hotspot?

Full disclosure: I asked this question on "Network Engineering" and it was quickly closed as off-topic and the moderator sent me here. Recently, I started self-hosting my academic webpage ...
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1answer
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How often are link-local IPv6 addresses renewed by Windows 10? Do they contain any “network prefix”?

How often are IPv6 addresses renewed by Windows 10? I am talking about link local addresses; not temporary random addresses. Should it, and does it contain a network ID prefix, which is used by ...
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How to enable IPv6 on an interface but disable IPv6 ND traffic

For an experiment, I am trying to disable IPv6 traffic on an interface as they cause packet-noise. I'm trying to have 0 packets generated by the interface but have IPV6 addresses configurable on it. ...
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IPv6 accessibility and Hitron Router

For my Hitron CODA-4582U Router, this is the best I can find and come up with - However, trying to connect from internet failed: Immediate connect fail for 2607:9880:3627:ffa4:92b1:xx:xx:681f: ...
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Access IPv6 server via IPv4 tunnel?

I am an installer for an ISP here in Alberta Canada. They recently launched LTE but are doing double NAT on IPv4 so accessing a server from the outside world isn't possible via IPv4. They do however ...
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1answer
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IPv6 on Linksys Velop, small issue

I have set my router to automatic IPv6 but it doesn't seem to work on IPv6-test.com. When I type ipconfig in cmd prompt (administrator) I get the IPv6 address starting with fe80 (and it's mentioned as ...
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1answer
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Disable or enable IPV6 in router?

I am trying kinda tinkering with my internet and read recently that some argue disabling or enabling IPV6 can actually a good/bad thing to do. I checked with my ISP and at the moment they have NOT ...
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Windows drops IPv6 periodically after ghost network packet

So this one haunts me for quite some time now, and I hope someone might be able to shed some light on the problem. My computer is connected to a IPv6 managed network. After a reboot it'll get an IPv6 ...
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34k views

how to access router with IPv6 address?

recently I tried to access my router's setting via 192.168.0.1 (manual said so) as usualy, however, thing is that a year ago I have switched from ipv4 to ipv6 and now ipconfig shows me this: Windows ...
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1answer
66 views

How to use IPv6 internet addresses on Linux with systemd-networkd

I have a problem with my providers internet router using IPv6 addresses and I realized that I do not really understand how to use IPv6 addresses. To get an idea I like to ask how to use the different ...
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0answers
53 views

No ping6 btween devices, 6lowpan network with raspberry pi

I am trying to make a 6lowpan network with raspberry pi device(s) and embedded systems. I enabled bluetooth_6lowpan (modprobe bluetooth_6lowpan and echo 1 > /sys/kernel/debug/bluetooth/...
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22 views

Enable IPv6 on Asus router rt-ac1200G+ on 3g dongle connection

My internet provider enabled IPv6 on a 3G mobile network which I use with a Huawei E180 dongle connected in USB of Asus rt-ac1200g+ router. If the sim card is used in a mobile phone IPv6 is enabled by ...
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24 views

How to set up a 6to4 tunnel on windows

There are 6to4 tunnel services like http://tb.netassist.ua/ or https://tunnelbroker.net/ but how can i set up those on windows? if I run the script (for example from netassist): netsh interface teredo ...
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15 views

MacOS: With enabled IPv6 ping fails to resolve IPv4 hostname but nslookup succeeds

My local DNS server registers DHCP hostnames so I can easily access my machines. I also have native IPv6 from my ISP and it's enabled and being used. The issue: "ssh hostname" or "ping ...
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1answer
57 views

Configuring router to assign static IPv6 addresses on the LAN, using an ISP-provided static /48 IPv6 network?

My ISP provides me with a "static /48-IPv6 network". I'd like to assign some "static" (as in out-living router/machine restarts) IPv6 addresses to machines behind that router so ...
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1answer
43 views

Multiple different IPv6 WAN addresses same time

this is my first post, so be gentle with me for sometimes not using the correct terminology. I am using a Fibre ISP with CG-NAT (DS-Lite). I connect via IPv6 Prefix Delegation with a /56 address space....
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11 views

How to configure Windows 10 to use static IPv4 address and SLAAC together?

I want to configure a Windows 10 VM to use manually-assigned static IPv4 address, but acquire an IPv6 address with SLAAC. It's a virtual server cluster and all other Linux hosts are set up as expected,...
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1answer
26 views

IPv6 on Android with DHCPv6-based ISP

My ISP assigns IPv6 prefixes using DHCPv6. I know Android only supports SLAAC. Is there any way I can configure my router to provide Android devices with IPv6 Internet connectivity?
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14 views

Broken webapp: need to disable ipv6 (i.e. use ipv4 only) for a specific host

I'm need to use a specific webapp developed by a small company. The webapp uses IP whitelisting. However, there's a problem with that feature: ipv6 is not working. They don't know how to fix it and ...
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1answer
30 views

Are local IP addresses on home routers always IPv4?

What the title says. I want to know whether I can assume all internal IP addresses supplied by a regular home router will be IPv4 or might they be IPv6 as well?
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13 views

IPv6 consistently slower on my network

This is more of a theoretical question than a practical one, but my ISP gives me a dynamic IPv4 address and a /56 IPv6 prefix. When running bandwidth checking tools, I see that I consistently get a 2-...
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2answers
48 views

Two NICs, One Subnet — Linux appears to be primarily transmitting on one NIC, and primarily receiving on the other NIC. How?

I recently pulled some hardware out of storage and put together a fileserver and for whatever reason, the motherboard has two gigabit NICs on it. Since I was tinkering, I figured I might as well plug ...
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0answers
28 views

Using IPv6 leads to “suspicious traffic” page when using Google Search

I have configured IPv6 tunnel provided by https://tunnelbroker.net/ on my router. IPv6 is working perfectly, but now I have another problem: when I try using http://google.com/ it says that suspicious ...
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2answers
20 views

WIFI Working but ethernet is not

Recently my ethernet connection stopped working. Didn't notice for a while because Wifi continued to work. Basically I keep getting 'unidentified network' doesn't have valid IP configuration. Tried ...
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1answer
72 views

How to forward UDP traffic from IPv4 to IPv6?

I have a local Server that only has an IPv6 Adress on which i want to host a Minecraft Server for my friends and myself. The Problem is that some of them don't have an v6 adress. I am currently using ...
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2answers
77k views

How can I use curl with ::1 for ipv6 based loopback?

I tried a few ways but they seem to be confusing curl. root@testt:~# curl localhost:8080 <h1>Hello world!</h1> <p>Boom Bam Splat</p> root@testt:~# curl ::1:8080 curl: (3) ...
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1answer
50 views

Circumvent DS-Lite restrictions to allow incoming IPv4 request on single port

I have recently moved, and my new ISP provides a DS-lite/carrier-NAT connection so that I do not have my 'own' IPv4 address but I'm pooled with many other people behind a single IPv4 address. As a ...
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103 views

A possibility of a bridge network in sending ip4 pings by adding wlan0 to br0

So I have a wifi chip connected to an application processor running linux, that's currently configured to be running wpa supplicant, and I see wlan0 interface has an ipv6. wlan0 Link encap:...
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43 views

IPv6 Network Design in 2021

I administer a couple of small networks with 10-20 machines on each (physical machines + VMs). Each network has a cable or DSL modem coming in, and I have one or two routers that I use internally to ...
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1answer
345 views

MPIO and ESXi 7.0 standalone

I'm trying to setup MPIO between ESXi 7.0 standalone (free license) and a SCST server. I created 4 vmknics (vmk1,vmk2,vmk3,vmk4) with IPv6 addresses (2001::1/64,2002::1/64,2003::1/64,2004::1/64) and I ...
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1answer
47 views

RHEL7 not assigning link-local IPv6 address to a new network interface

I have written Linux network drivers for a new device. I expect the new interface to get IPv6 link-local address when I insmod the drivers. This works fine on Debian10, CentOS8 and various Ubuntu ...
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8answers
128k views

How to get the IPv6 IP address in Linux

I have a Linux server and I want to find the main IPv6 address via one single command line. My command so far: $ ip addr show dev eth0 | sed -e's/^.*inet6 \([^ ]*\)\/.*$/\1/;t;d' which shows: 2001:...
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1answer
36 views

The same ipv6 prefix of router and PC, how does the ISP's router send the package to my PC?

There is a ipv6 address whose prefix length is 64 on my router. The DHCPv6 mode of router is hybrid. The ipv6 prefix length length is 64 too on my PC under the router. router eth0 2001:2:3:4:...
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46 views

First time setup of OpenVPN, cannot connect. Network is Unreachable. PiVPN

So i got an orange pi pc running armbian with pivpn/ openvpn with ethernet connected to my router. i have spent the last few days trying and researching on how to setup everything but i cannot get the ...
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0answers
14 views

Running a server with an ipv6 only ISP

I am running a simple gaming server using my local network and my ISP only supplies an IPV6 address, using a ddns service to portforward. From what I've read, I need a 4in6 tunneling service but I ...
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13 views

Suppress usage of IPv6 interface identifier address during CentOS kickstart installation

While working on an automatic CentOS kickstart installation in a high security IPv6 only environment i discovered that the kickstart file, .treeinfo and squashfs are sometimes downloaded using the ...
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2answers
3k views

How to set up OpenWrt traffic rule for port forwarding IPv6 server on my LAN?

I would like to allow inbound IPv6 traffic on ports 80/443 for a globally routable web server on my home network. What's the best way to do this with OpenWrt, which by default blocks incoming IPv6 ...
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12 views

IPv6 Web Server Traffic Not Resolving

My ISP switched to IPv6 addresses this year and I'm now having trouble setting up a web server on my network. It's Apache on Ubuntu 18.04 and my DNS hosting is w/ GoDaddy. I'm able to run a successful ...
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3answers
108k views

Why is there a percent sign '%' in the IPv6 address?

I am using the .NET Framework classes to get the IP addresses for my machine. Dns.GetHostAddresses(Dns.GetHostName()) I have a VirtualBox adapter which has both an IPv4 and IPv6 address. Using the ....

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