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Internet Protocol version 6 (IPv6) is the latest version of the Internet Protocol (IP), the communications protocol that provides an identification and location system for computers on networks and routes traffic across the Internet.

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I understand that IP colisions are incredibly rare under IPv6. Most subnets are at least 64bit, meaning that the risk of true random collision is neglegable. However there are circumstances where ...
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I was attempting to interrupt a TCP connection on my system, and was altering iptables rules using the iptables command. Nothing I did seemed to have any effect, though. Inserting and deleting rules ...
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I have been having trouble connecting to this Wifi router, which is the only one available. When I do connect, I can access ipv6 but NOT ipv4. I have tried disabling and enabling ipv6 and restarting ...
Lum1te's user avatar
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I set up an opnsense firewall that runs a DHCP server for IPv4 assignment in my LAN. Furthermore, as my ISP provides me with IPv6 too, my LAN clients also configure a SLAAC address with IPv6 prefix ...
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I’m running Kali Linux, which is installed on a VMware virtual machine. I have been facing issues while trying to update and install packages using apt. The system shows errors related to connection ...
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I’m working on a Raspberry Pi-based network device that moves between several known locations, each with its own IPv4 and IPv6 subnet. To streamline connectivity, I’m considering assigning multiple ...
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I have a Raspberry Pi with two network interfaces, eth0 and eth0100, both configured with global IPv6 addresses in the same /64 subnet (2405:200:185:2666::/64). From my MacBook, I can connect to ...
nhz's user avatar
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After successfully installing Nextcloud on my Raspberry Pi running Debian and accessing it locally, I have some issues configuring my Apache2 Webserver for external access. My internet provider is ...
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I want to test an application that runs a complete IPv6 stack in user space. The application is supposed to process and send ethernet frames. For that I want to set up a network interface on Linux ...
Richard W's user avatar
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I am trying to configure a NetworkManager connection for IPv6 privacy. My goal is to assign a temporary IPv6 address with limited lifetime to my device. I manually crafted a xxx.nmconnection ...
ajlittoz's user avatar
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I have a CentOS6 box which I've used as a NAT router for years, with /proc/sys/net/ipv4/ip_forward=1 I now have both an IPv4 address and an IPv6 address from Starlink, with inet6 addr: 2605:****:****:*...
Andrew Daviel's user avatar
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I know I can enable/disable IPv6 on a specific network adapter using /proc/sys/net/ipv6/conf/<adapter_name>, but I'd like to disable IPv6 for a specific user or group. Is there a way to do that? ...
Dmitry Grigoryev's user avatar
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I am not even sure if I am going about this right but I wanted to see if the option exists. I have a Fedora Linux server running on my network. I get a 2600 GUA IPv6 prefix from my ISP and I also have ...
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On Solaris10 (vm on qemu) I configure ipv6 ipsec and firewall are disabled svcs -a|gegrep 'ipfilter|ipsec' disabled 1:00:14 svc:/network/ipfilter:default disabled 23:38:28 svc:/network/...
elbarna's user avatar
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Why Solaris refuse to use my custom address? This command works fine ifconfig e1000g1 inet6 plumb up fe80::5254:ee:fdc7:a479/10 This one not ifconfig e1000g1 inet6 unplumb ifconfig e1000g1 inet6 ...
elbarna's user avatar
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So I have an embedded system I've built with yocto. I'm trying to enable DHCPv6. But when I try to bring the interface online, ifup says it can't find DHCPv6 software, even though dhcpcd is ...
Dave's user avatar
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Ubuntu 22.04 I'm experimenting with IPv6 protocol stack in Linux and tried to figure out what protocols are supported as L3-layer protocols on top of IPv6. According to IANA I ran the following simple ...
Some Name's user avatar
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This question is a follow-up on How can I view IPv6 router advertisements that are being received by my computer for diagnostic purposes?. When the system already received routing advertisements and ...
dahooz's user avatar
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I recently switched my virtual private server hehoe.de from Ubuntu to Arch Linux. I am struggling trying to regain IPv6 connectivity. Access via IPv4 is working fine, so the hardware is okay. The ...
Hermann's user avatar
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I have several local computers in a simple home setup, the interfaces all configured with systemd-networkd (systemd version 252), all running in debian bookworm (12.7). Each computer has a wifi dongle ...
Roberta's user avatar
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I've set up a fresh Debian 12 system today and wanted to try out IPv6 in my network a bit. So I set up an IPv6 ULA on my router and created a new Debian VM for testing. The Debian VM picks up the ULA ...
Hier's user avatar
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to test the IPv6 capability of our end devices, i need to set up a hotspot on a raspberry pi that only provides ipv6 adresses. I followed this guide: https://partiallydisassembled.net/posts/pi-nat64....
Dominic's user avatar
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I'm performing testing for USGv6 certification against a Linux build made using Yocto (Poky distribution version 5.0 - Scarthgap, Kernel 6.6). All required tests are passing except one: an echo ...
Sherlock's user avatar
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I'm running Docker on a Raspberry Pi 4 (8GB model) with Raspberry Pi OS, and I'm experiencing an issue where Docker intermittently attempts to use IPv6 addresses to connect to Docker Hub, despite ...
Md Faisal's user avatar
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I have a router that gets a /48 prefix from my ISP, and had prefix delegation enabled. I run a (debain)server on the router's main network. I've set up a vlan for my IoT devices on my server, for ipv4 ...
Pelle's user avatar
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I have a weird issue. I'm trying to mount CIFS through IPv6. Using the litteral IPv6, everything is working fine : mount -v -t cifs //2a01:****:***/video /mnt/mydir -o username=myusername,password=...
Nicolas Dupin's user avatar
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How to check if a port is blocked with socat? How to check with IPv6? I heard a saying that machines behind NAT can still be directly connected via IPv6, is that true? Anyway, say I have a machine ...
xpt's user avatar
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How to make Tacacs+ server to work with Ipv6 address on Ubuntu? It works fine with Ipv4 address but authentication fails when using IPv6 tacacs+.
Kriba's user avatar
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I am working on an embedded system and it uses udhcpc6 as its DHCPv6 client. If I set an interface to 'dhcp' in the /etc/network/interfaces file, udhcp and udhcp6 automatically start. I then connect ...
NickG's user avatar
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My VPS listens to SSH on port 222. On my clients I created a ssh_config such that the non-default port needs not to be explicitly provided on the command line every time. (Some daemons which ...
user2690527's user avatar
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I am having a problem in which applications running in podman containers are attempting to use ipv6 addresses, despite the container having no ipv6 routes (other than the expected link-local addresses)...
larsks's user avatar
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Although I have disabled IPv6 in sysctl.conf (Debian 11), connecting my main switch to an IPv6 enabled router results in IPv6 addresses being allocated on Debian interfaces and I can ping and SSH to ...
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Note: I already checked this question and this question. The solution of the former is not relevant to my problem and the latter does not have any answers. I have a basic VPS from aeza.net. When I ...
Amirreza A.'s user avatar
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This is a Raspberry Pi running 64 bit Raspberry Pi OS bookworm (debian 12.5). Sometimes when I boot I find that IPv6 hasn't successfully been set up. The local network has an IPv6 capable border ...
nsayer's user avatar
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330 views

Although I've disabled IPv6 using /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 IPv6 addresses still show up on the ...
vfclists's user avatar
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I have a linux SUSE host which has both ipv4 and v6 enabled, below are the interfaces:- eth0,app,eth1 however the default route is available for ipv4 via eth0. Kubernetes is running on this host(...
Pranab Das's user avatar
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Is there a way to find out if the IPv6 network cable is disconnected from the server through the terminal? Pinging google won't work as it could be an intranet. Any help would be appreciated!
user2384330's user avatar
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1 answer
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We're currently configuring an Azure load balancer to work with a Linux-based backend supporting both IPv4 and IPv6. As part of the setup, the load balancer performs health checks at regular intervals ...
Brecht Vercruyce's user avatar
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3 votes
1 answer
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I've been accustomed to IPv4 for so long and I'm really unfamiliar with IPv6. I recently wanted to add a firewall rule to my OpenWRT router to allow inbound IPv6 connection to a certain port of my ...
citrate's user avatar
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1 answer
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I would like to have devices on my network autoconfigure ULA addresses in a prefix generated by https://www.unique-local-ipv6.com/ on my network, which is predominantly IPv6-only. My main router is ...
neezer's user avatar
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1 answer
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I have created an ipv6 tunnel by using the following commands: ip link add gre_test type ip6gre remote 2001:4860:4860::8888 local ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff ttl 255 removed actual ipv6 ...
vrax's user avatar
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I want to re-enable IPv6 on my system which is currently disabled in GRUB directly. But if I remove ipv6.disable=1, I then get a blank (backlit) screen. It took me tonight to figure out that I have a ...
Vlastimil Burián's user avatar
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I tried the following: sysctl -w net.ipv6.conf.Ethernet1.200.disable_ipv6=0, but it gave following error: sysctl: cannot stat /proc/sys/net/ipv6/conf/Ethernet1/200/disable_ipv6: No such file or ...
gerrit_noob's user avatar
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I'm trying to mount a Windows share on a headless Linux computer with the following systemd unit file: [Unit] Description=mount network drive from harvester OBC Requires=network-online.target ...
Joooeey's user avatar
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Debian 12.4 with networking managed by systemd networking.service, dual stack IPv4 and IPv6. I am aware of the many questions asking how to stop the system from updating resolv.conf, and this is not a ...
Ex Umbris's user avatar
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I have two ipv6 interfaces(eth1 and eth2), that receives an IP via DHCP(dhclient is used), but the routes are received via RA messages from switch, to which these interfaces are connected. Since RA ...
lucky_rydar's user avatar
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I'm currently investigating a strange network issue. Consider the following IPv6 Router Advertisement (note the prefix lifetimes, 5400 and 2700, respectively.): $ rdisc6 -1 wlan0 Soliciting ff02::2 (...
dialer's user avatar
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I'm trying to add one main IP, two extra IP and one IP6. Here is my interfaces file located at /etc/network/interfaces: source /etc/network/interfaces.d/* auto lo iface lo inet loopback allow-hotplug ...
ramed rafie's user avatar
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#!/usr/bin/bash echo "Give me your private IP and its mask";read given if [[ "$given" =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}/{0,1}[0-9]{1,3} ]]; then echo "version 4" ...
John Smith's user avatar
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I configured sshd on my remote host with /etc/ssh/sshd_config.d/custom.conf: AddressFamily inet6 PermitRootLogin yes PubkeyAuthentication no Match Address fe80::d075:6982:4410:e071 This is a fresh ...
John Smith's user avatar
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