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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RDP credential were use to connect did not work, please enter new credential [closed]

Last 2 weeks i have been facing remote desktop connection problem. I am new in AWS. A few day back, I had received an account suspension mail because of payment due. I made all the payment done. Now i ...
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Ubuntu, IPv6, multihome, e-mail, source selection. Arghhh

I've been hosting my e-mail forever, and have been also using IPv6 via 6o4 (HE) for some time. Here (South America) IPv6 has been slow in acceptance, so to say, so everything went fine until now. Now ...
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How to configure an IPv6 tunnel on AWS?

I'm running openvpn on a dual-stack AWS EC2 instance (Ubuntu 18) in an AWS VPC. Connecting to the VPN software and tunneling IPv6 seems to work fine; I can bring up a VPN link and ping6 around the VPN ...
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how to fix my ipv6 arch linux

I've been having problems with NPM giving an error saying there's a problem with my connection. When I go to https://test-ipv6.com/index.html.en_US, it says No IPv6 address detected How would I go ...
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Windows not returning any IPv6 address in DNS lookup

My DNS contains two records for ServerA: an A record with its IPv4 address: 10.25.46.130 an AAAA record with its IPv6 address: fda8:6c3:ce53:a890::55 I am not able to get my SimpleClient.java ...
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Limited internet in Mac OS VM

I'm running macOS 10.13 High Sierra (64-bit) on VirtualBox on a Windows machine. Problem: Accessing sites such as Google, Youtube, Github, Facebook, etc. all seem to work mostly fine. However, I can't ...
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Is my IPv6 behind an ISP CGNAT?

I am trying to SSH into my PC from outside my house using its IPv6 address, and I get an error of "host is unreachable". test-ipv6.com gives me 10/10 score. Pinging my router's IPv6 works. ...
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How to add ipv6 static route?

I'm new to IPv6, this is my home network +------------------------------------------+ | ...
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Raspberry Pi Openthread IPv6 Network

I have set up a Raspberry Pi with an OpenThread RadioCoprocessor to run as a OpenThread Border router. This works, but I am having trouble reaching the NAT64 interface from the Thread network. At home,...
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Ethernet inet6 issue

I have a selfhosting server working on Ubuntu 21.10, I'm using Cloudflare service and everything was working good until suddenly my eth0 adapter won't resolve an IPV6 address. this weird issue start ...
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How to avoid using IPv6 `::1` when sending a syslog message via `logger` to `localhost`

When using logger -n localhost -port 12345 ... I realized that logger is using IPv6 when creating the socket. Unfortunately my syslog server listens on IPv4 only. The work-around I found was to use ...
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is there table like Ipv4 ARP for IPv6 in linux? where can i (path) find it?

where can i find NDP table in linux? I'm trying to list the neigbours for the ipv6 address for my appliaction. ip neigh is the command which we use to show the neigh ip address (both ipv4 and ipv6)...
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How to route traffic to IPv6 only through a dualstack Server

So my problem is as follow: I have an iPv6-only VPS(#1) and tried to run a minecraft server, which doesnt seem to like v6 a lot. I also have another VPS(#2) that has both a V6 and a V4 address. I was ...
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Ubuntu ipv6 link-local not set

I have an usb ethernet adapter that I use to test network configuration, a Raspberry pi is at the other end of the cable. I'm trying to setup ipv6 connectivity, but a link-local address is never set. ...
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Can I use a dynamic DNS service to bypass blocked ports?

From another post I consider the fact that I might be behind a "Carrier Grade NAT".. This technology disables port forwarding.. Okay.. I am not sure how to fix my current situation.. Can I ...
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Why pinging ipv6 host does not work in this script

I wrote this script to simulate source->router->destination network in both ipv4 and ipv6. The ipv4 works, but the ipv6 does not. Can someone please help me figure out why it is not working? #!/...
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How to assign ipv6 IP addresses to net devices?

The following is a series of command to setup two network namespaces and a router in between. I wanted to connect the two to try things out. This works as you can see below using ipv4, how can I ...
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how to simulate two hosts and test the performance of ipv6 between them in Linux

I would like to be able to performance-test a change that I made to ipv6 using iperf. I do not have two physical machines; I have only one. I know that I can simulate two hosts using linux's network ...
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Is there a PowerShell equivalent for "netsh int ipv6 show joins"?

Is there a PowerShell command that yield the same output as netsh int ipv6 show joins
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Trying to prevent IPv6 leaks on OpenVPN server results in no internet access

I've had a working IPv4 OpenVPN server for some time now, and in order to stop IPv6 traffic on it I added an IPv6 pool to my server and pushed a route for the public IPv6 range: server-ipv6 2001:db8:0:...
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Outside Access via IPv6 and DSLite

I am using Vodafone Germany, which provides IPv4 & IPv6. IPv4 is provided via DS-Lite Tunnel. I have also set up DuckDNS (Dynamic DNS) for a raspberry in my network. Let's say my hostname is ...
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Not getting IPv6 address on Windows 10 when on wifi

I have an IPv6 capable router/AP setup at home and when I connect to my main router via Ethernet my Windows 10 laptop gets an IPv6 address as expected (http://test-ipv6.com/ is all green, 10/10). ...
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Unable to use MTU larger than 1990 on Linux with RNDIS

I have an USB device that is connected as RNDIS device. Its MTU is set to 15000 by default. Internally the USB device run Linux, and this is the ip a output: $ ip a [...] 4: usb0: <BROADCAST,...
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KDE (ubuntu 20.04) causing NetworkManager to create a wired connection via ipv6. Unable to stop it

Unknown KDE function/app causing Network-Manager to create a wired network connection and connect via ipv6. I have not been able to turn it off. I follow the logs, first I removed an entry from ...
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How to block single user via nftables?

I'm trying to setup a user, to run python applications without any internet connection. But allow all other users to use the internet. To ensure the "user", is quarantine from all activity. ...
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Network problems on my windows 10

I am having trouble connecting with an Informix Database Engine installed on my machine. When I run a project in Spring Boot I get a Java error saying: "Connection refused". I've been ...
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Proper implementation of IPv6 for LAN when having Dynamic IPv6 address from ISP

I have a working IPv6 setup with LAN and WAN interfaces. However, there is challenge since ISP provides the Dynamic IPv6 address (range) instead of static (I do not know why?). So, any time the WAN ...
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Openwrt - Prevent devices from acquiring a global unicast IPv6 address

There are some IoT devices on my network which acquire a 2601: IPv6 address. Since that address falls in the range of my ISP, I assume these IoT devices are getting that assignment from some IPv6 DHCP ...
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IPv6 eth0 ready kernel messages repeating every 5 minutes

I have installed Ubuntu server 21.10 64bit on my Raspberry Pi 4 4GB. On this Raspberry Pi I am experiencing random crashes where i cant connect to my Raspberry Pi anymore (maybe unrelated). When I ...
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dnsmasq split-horizon DNS IPv6 and CNAME

I maintain domain name example.com which has a subdomain a.example.com. Public DNS server for a.example.com is configured with a CNAME foo.example.com record which in turn points to AWS. Outside of my ...
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Is it possible to host my website with just an IPv6 without an IPv4?

Basically, here's my situation: I have an old laptop and want to use it to host a website on my home broadband, but my ISP only allows one static IPv4 address on the home connection. I don't want to ...
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OpenWRT, ipv6 is not connected, I can't ping global ipv6 addresses, ipv4 is working fine though

I need help with my setup which is : ISP router LAN port => OpenWRT router WAN port. OpenWRT router LAN ports and WIFI => my home devices I am running default OpenWRT out of the box ...
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OpenWRT, forward all incoming ipv6 WAN traffic for router’s WAN IP on port 3000 to one PC on LAN with a local ipv6 address

I need help with OpenWRT. I want to forward all incoming ipv6 WAN traffic destined for router's WAN IP on port 3000 to one PC on LAN with local ipv6 address. I have tried Firewall - Zone Settings =>...
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How do I disable AAAA DNS queries without disabling IPv6 entirely?

This is the scenario: A host computer must be available to the LAN via IPv4 only, whilst virtual machines hosted it must be exposed to the internet via IPv6 only. The problem is: when I start the ...
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IPv6 DHCP is disconnected from the Internet

A friend's MacOS has this configuration and it is connected to the Internet: IPv4 DHCP IPv6 disabled And then he changed it to IPv4 disabled IPv6 DHCP In the following several seconds, this PC is ...
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No FTP over Portmapper because of PASV instead of EPSV

due to ds-lite I can't connect to the FTP-Server of my NAS. So I'm using an v-server as portmapper with 6tunnel. The login works fine, but the rest doesn't work. I'm using passive ftp, the FTP-Server ...
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How to reset password when Default Gateway starts with fe80::?

My ipconfig shows a Default Gateway like this: ... Default Gateway . . . . . . . . . : fe80::217:32ff:fe87:8cd0%28 192.168.68.1 The cause was explained in this ...
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Can't access NAS over IPv4 on Windows 11 while other Windows 10 PCs can access it

TL;DR: I can’t access my NAS over IPv4 on my Windows 11 PC while other Windows 10 PCs can access it. I have an QNAP NAS TS-228 (Firmware 4.3.6) for storing my data. I freshly installed Windows 11 on ...
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Usage of remote WakeOnLan in a IPv6 only environment?

Setting: FritzBox 7530 v7.29 forwarding ports 7, 9, 80 and 433 IPv4 and IPv6 to HomeServer CentOS Stream 8 HomeServer directly connected to FritzBox via Ethernet cable own public IPv6 address, shared ...
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ip6tables - create a set of IPv6 address to block

I'm using ipset for containing and matching a sets of IPv4 and it works great! I tried to do the same with IPv6 addresses and ran with errors. I have a IPv6.cidr file that contains IPv6 addresses and ...
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DHCPD v6 binding state is always active and never switch to expired

In my dhcpd6.leases file, all my IPv6 addresses given by my DHCPv6 server (isc-dhcpd-4.4.2) stay in binding state active forever. Even when I shutdown the client. In theory, the old leases should ...
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What exactly is router cascade option doing? [duplicate]

I'm trying to understand what exactly happens when routers are cascaded. All description I can find state that it is done when I want to connect router to router but I can do it without any setup. So ...
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I can't access some IPv6 websites

I'm doing some tests with my IPv6 through curl and ping. For some reasson, I can access IPv6 version of Google and some other websites, but I can't reach npmjs.com even github.com. See the examples: ...
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How to configure DHCPv6 in Proxmox without bridge [duplicate]

(crossposts: Network stack exchange, Server Fault) I have a setup with Proxmox connected via Wi-Fi. Everything works for my needs and IPv4 connectivity too. Now, I want to see if it is possible to do ...
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Minecraft server works via IPv4 but times out via IPv6

Disclaimer: I am posting this on superuser since this is about configuring the minecraft server (or possibly the client or network), not an issue with the game. If this is the wrong place, please ...
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How can I publish one of my devices as DNS server when using IPv6?

I run Pi hole, and I have a TP link router (Archer C6) with IPv6 capabilities. My ISP seams to supports this type of connection via "dynamic IP (SLAAC/DHCPv6)". I think I'm encountering kind ...
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How to exclude specific ip in wide-dhcp6s server

I am using wide-dhcp6s server in Linux based device.My problem is i want to exclude specific IP in dhcpv6 pool. My IPv6 pool ranges between 2001::1 to 2001::A i want to exclude IP address 2001::5 i ...
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Make windows 10 use the dhcp6-address it have, not autogenerated

A window 10 machine gets its ipv6 address from dhcp6, and it also have an adress based on mac DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IPv6 Address. . . ...
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Access Home Webserver behind DSLite via Relay Server

So I have this connection where I don't get a public IPv4 address, only a IPv6 from my provider, and every IPv4 traffic is tunneled to their Server and translated to v4 via NAT (and back). Now, I ...
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Why is DNS Resolution failing when default gateway is changed to backup circuit?

We have a strange problem that I hope someone can help with. We have a building that has a fiber circuit and a backup Comcast circuit (coax). The system is setup like this: Fiber NID (cat6 cable to ...
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