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Questions tagged [ipv6]

Version 6 of the internet protocol, which will replace version 4.

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Error: Conflicting default route declarations for IPv6 (table: main, metric: default), first declared in ens3 but also in he-ipv6

I have a server from OVH (VPS) but unfortunatelly they only provide a /128 IPv6 block. So, I decided to use a Hurricane Electric (HE) tunnel to have a /64 IPv6 block. I've followed HE instructions in ...
Joniii11's user avatar
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Ubuntu 24 and 22 only connecting to all repositories via mobile phone hotspot

Apologies if this question has been asked before, but I only seem to be able to get to some Ubuntu apt repositories via a mobile phone connection and I can't figure out why. They just don't like my ...
cptwillard's user avatar
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Is it possible to combine the bandwidth of wireless and wired NICs?

My server (using Ubuntu server 22.04 LTS) has a 100M wireless and wired network card, and I'm using it to run a website (pure IPv6). Both NICs are currently connected to the same router, is it ...
NXY's user avatar
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SSH session over ipv6 feezes after short time, works fine over ipv4

I have set up a server and a router (two machines) with both ipv4 and ipv6 (ULA). Ubuntu Version: 24.04. When using ipv4 for both ssh and cockpit everything works fine. On the other hand, when using ...
mispp's user avatar
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Ubuntu 24.04 freezes when compiling code with LLVM-14

I have been running into an issue over the past 2 weeks where compiling my work codebase (bazel build system) causes Ubuntu to freeze completely. The only way out is to force-restart. I have tried ...
niran90's user avatar
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Configure Ubuntu to create only one IPv6 address, without the "noprefixroute" flag

Ubuntu 22.04.4 LTS comes up with two IPv6 addresses; one appears to be always the same, and has the "noprefixroute" flag and is therefore not accessible from the outside world; the other is ...
David Higton's user avatar
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Disable IPV6 but your article may need an update for Unbuntu 22x

Your Topics on this are interesting and I've looked at them. Particularly How to disable IPv6 permanently? As a newbie, I cannot make a comment, so I am asking a question I am on Ubuntu 22 and the ...
Toprobroy's user avatar
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add ipv6 address in /etc/network/interfaces

I'm trying to add IPv6 static address to my config, with instruction from provider, but this didn't work. ping doesn't respond. What am I doing wrong? Ubuntu 22.04 IPv6 Adress data: address 2A03:4900:...
Евгений Плита's user avatar
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Two Ubuntu 22.04 laptops connected to the same IPv6 subnet, one works normally but the other one ignores IPv6 RA and failed to set default route

I'm administrating a IPv6 subnet that use DHCPv6 to assign IP and internal DNS. The router of this subnet is configured to send IPv6 RA with both M-bit and O-bit enabled, and both L-bit and A-bit in ...
RichardLiu's user avatar
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Under the same wifi router, ubuntu 22.04 got ipv6 address, but can't access ipv6 website, while windows 10 works correctly, why?

in my office, I have a TP-LINK wifi router(TPlink TL-WDR7660). The wifi router's WLAN setting is that the ipv4 address of the WLAN port is automatically assigned by the upstream router, while the LAN ...
ollydbg23's user avatar
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AnyIP feature together with ndppd works on some VPS and doesn't on some others. Why?

I have VPSs mostly from the same provider but located in different places. They come with a single IPv4 and a /112 IPv6 subnet. I am trying to use AnyIP feature of Linux as described Here to make my ...
PouJa's user avatar
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Ubuntu 20.04 - Browsers (Firefox & Chrome) Won't Use / Prioritize IPv4 Despite gai.conf Precedence - How can I prefer IPv4?

In /etc/gai.conf, I have the following: label ::1/128 0 label ::/0 1 label 2002::/16 2 label ::/96 3 label ::ffff:0:0/96 4 precedence ::1/128 50 precedence ::/0 ...
OwN's user avatar
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Only IPv6 Link Local Address after Ubuntu update

Since recently running a software update on my Kubuntu laptop, I only have a Link Local address assigned for IPv6. The connection GUI IPv6 configuration looks normal and identical to my working ...
Dave's user avatar
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Can't ping dynamic IPv6 Xubuntu hostname from Kubuntu laptop

Ever since I updated my computers yesterday with the latest Ubuntu updates, I have been having issues with the computers communicating with each other. Originally, nothing (Either my mobile [Android], ...
Dave's user avatar
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ubuntu-22.04.3-live-server-amd64 LTS device gets public ipv6 assigned but not able to access it

Since I have Internet connection from an ISP that does not give public ipv4 and keeps the connection in cg-NAT but too my surprise I found out that it is assigning public ipv6 to all my devices. After ...
utkvishwas's user avatar
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Are ubuntu snap servers only accessible via ipv4-only?

I tried to apt update and snap refresh on an IPv6-only Ubuntu machine. The update worked fine, but the snap refresh hasn't. The shown error only mentions that it timed out. I tried three different ...
baltazar's user avatar
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860 views

Ubuntu 22.04 can't set correctly ipv6 address

I'm trying to configure a Ubuntu 22.04 server with two networks, one with ipv4 and one with ipv6 (dual stack). this is my /etc/network/interfaces (The ipv6 address in my file are correct, here I ...
Marco Ferrara's user avatar
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No IPv6 link-local address assigned to ethernet adapter, but is working on Wi-Fi

I have a fresh Ubuntu 20.04 install on a system with 2 interfaces - Ethernet (enp2s0) and Wi-Fi (wlp3s0). On the enp2s0 interface I set a static IPv4 address and wlp3s0 is using DHCP for Internet ...
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pppoe reconnect can't release old ipv6 address

I installed ubuntu 22.04 and enable ipv6 in pppoe network, but I found pppoeconf doesn't release old ipv6 address when ISP auto disconnect and re-connect with the network. Does anyone know how to ...
jack's user avatar
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2 votes
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802 views

How to use local-link ipv6 for ssh?

I am able to remotely access my Ubuntu 22.04 PC from my windows' notebook at my local network using ssh ssh <username>@<public ipv6 address> -p <port> Or ping it without no problem. ...
hamagust's user avatar
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How to effectively to set a global static ipv6 by `addr-gen-mode=eui64`?

I see there are a lot of questions about static ipv6, and privacy (like here, here, here, here and here), and I believe I have tried most of the available solutions (or at least those I was able to ...
hamagust's user avatar
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6 votes
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Why can't I ping over IPv6?

I can browse normally, I can create this question for example, apt update works fine, but when I was trying to install firebase using npm, I received a time out (npm ERR! network request to http://...
Felipe Cristiano's user avatar
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149 views

How can I enable IPv6 when microk8s is already installed?

I’ve read this article about enabling IPv6 on microk8s (which is a snap-package), but the documentation only talks about how to apply the configuration before you install microk8s; I installed it ...
telometto's user avatar
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IPv6 routing issues with Vodafone CZ modem

IPv6 used to work for me but something must have changed either in Ubuntu/Xubuntu or in the ISP (Vodafone CZ) modem about two months ago. When I set the Network Manager UI to "Automatic", it ...
wilx's user avatar
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Ipv6 vs Ipv4: is there a way to force ipv6 use?

Ubuntu/Linux beginner here, so I was wondering if there's any way to force Ubuntu to prefer IPv4 or IPv6 when resolving a name (ex.: google.com has ipv4 and ipv6 addresses. is there any setting which ...
Luis Abreu's user avatar
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245 views

Problems enabling IPv6

I have two Ubuntu Servers on my home network: one acting as a router/gateway (Router), and the other acting as a media/multipurpose server (Server). I've been trying to enable IPv6 on both, but I'm ...
ohshitgorillas's user avatar
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Ping ipv6 localhost fails address family for hostname not supported

A year or so ago I tweaked my IPV6 config to disable it, or at last that's what I tough. I don't remember which commands executed or which articles I read. Currently I'm at LM Cinnamon 21.2 (Ubuntu 22....
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netplan - trouble converting gateway6 to "to/via" directive

I'm attempting to update my netplan config to use a routes directive instead of gateway6 since gateway6 is deprecated. My working configuration file looks like this: # /etc/netplan/51-cloud-init-ipv6....
Ralph's user avatar
  • 103
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1 answer
95 views

Turn off IPv6 resolution for particular URL only

I'm having an issue with registry.npmjs.org -- When I attempt to access it through the command line (e.g. implicitly by using the npm command, or when doing a ping registry.npmjs.org), the access ...
R.M.'s user avatar
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309 views

Terminal has network (DNS?) issues but browser works fine. ipv6 issue?

EDIT: It seems it might be a cable modem issue: according to https://test-ipv6.com/ ipv6 is not working both in Ubuntu as well as windows (dual boot, same workstation), and neither on my smartphone ...
JRTG's user avatar
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228 views

Ubuntu 22.04LTS - Wifi issue low network speed because of IPv6

I upgrade from Ubuntu 20.04 to 22.04LTS. I noticed that my wifi speed slowed down from 40 Mbps to 1 Mbps(max) after one hour. Again, if I reboot then it worked fine. After trying multiple suggestions ...
Yogesh Yadav's user avatar
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154 views

IPv6 "Activation of network connecting failed" [WiFi] and many urls unreachable (incl snap)

The first thing I noticed was that snap could not connect (running release 22.10): Failed to find refreshable snaps: status-code=500 kind=(null) message=cannot list updates: persistent network error: ...
Taolon's user avatar
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2 answers
379 views

IPv6 source address selection with addrlabel and netplan

I have configured my Ubuntu 22.04 via netplan like this: network: version: 2 renderer: networkd ethernets: enp3s0: addresses: - 192.168.10.10/24 - 2001:db8:6789::10/64 ...
Sitron_NO's user avatar
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2 votes
0 answers
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IPv6 issues Ubuntu 20.04 server

I have a server running the following software: Ubuntu 20.04 cPanel 106.0.13 PHP 8.1 MySQL 8 Litespeed Web Server Elasticsearch 7.17 Redis 7 I am running a magento 2.4.5 store on this server which ...
Alex Smith's user avatar
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0 answers
422 views

Trying to use a tunnel from HE but some IPv6 connectivity is broken

I have a server from Kimsufi (OVH Eco branch) but unfortunatelly they only provide a /128 IPv6 block. So, I decided to use a Hurricane Electric (HE) tunnel to have a /64 IPv6 block. I've followed HE ...
TehPeGaSuS's user avatar
2 votes
3 answers
1k views

Route all traffic on port 443 (IPv4), to an external IP address on port 80 (IPv6)

I want to host a website from home using the Yggdrasil network. Yggdrasil gives me a static IPv6 address at home (even if behind a DNS). However "regular" users cannot be routed to that IP ...
Thomas Browne's user avatar
1 vote
1 answer
198 views

How to find out the program from iptables log

Testing the ping on ubuntu 22.04: Host A IPv6: 1111:1111:1111:1111:1111:1111:1111:1111 Host B IPv6: 2222:2222:2222:2222:2222:2222:2222:2222 Host A: Now execute a ping from Host A with the following ...
stackbiz's user avatar
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264 views

SLAAC suddenly enabled in Jammy with kernel 5.15.0-56-generic #62-Ubuntu

Last night, my Ubuntu-based VPS updated itself to Linux smtp 5.15.0-56-generic #62-Ubuntu SMP Tue Nov 22 19:54:14 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux and since then, SLAAC seems to be ...
Rhialto supports Monica's user avatar
1 vote
0 answers
419 views

Cannot SSH using IPv6 address until I ping it with the correct address

I'm having a weird problem when trying to SSH into a wireless SBC running Armbian (Ubuntu 22.04.01 LTS). When I try to SSH using the FQDN it doesn't respond: vmplayer@vm-play:~$ ssh -l potato potato-...
w.phyer's user avatar
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1 vote
1 answer
5k views

IPv6 network on Ubuntu Server 22.04

Can't seem to get the IPv6 network to work. Unfortunately, I decided to reinstall the system anyway. And IPv6 doesn't work for me either. Given: Dedicated IPv4 like: 45.80.XX.XX/32 and gateway 10.0.0....
Nick's user avatar
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1 vote
1 answer
516 views

Why is Ubuntu 20.04 lts not using the random ipv6 address?

I have a dualstack Internet connection. In Windows I get ipv6 address from my local DHCPv6 server and 2 other random ipv6 addresses. Wen i check online what ipv6 address windows is using to connect to ...
Gerard's user avatar
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1 vote
0 answers
373 views

A strange problem about IPv6 TCP connection

I have a really weird problem. In short, everything works fine with IPv4, ICMP & UDP for IPv6 is also fine, however, TCP for IPv6 can only "listen", but cannot establish a connection ...
Mogician's user avatar
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1 answer
476 views

Systemd-networkd and IPv6Token in 20.04

I've been recently playing with IPv6 but I have a vexing problem with my little Ubuntu box. Systemd-networkd (from systemd 245.4) is supposed to understand a directive like this: IPv6Token=...
anssi's user avatar
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967 views

How can I set up my Ubuntu sever as ipv6 tunnel?

I have an Ubuntu server one bare metal that has both ipv6 and ipv4 dedicated, but my home ISP ONLY PROVIDES ME WITH ipv4, is there any sane way of setting up my dedicated server as an IPV6 tunnel ...
Max's user avatar
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582 views

IPv6 Tunnel For Ubuntu

Hi Dear Friend I Want Run IPv6 tunnel Between 2 Ubuntu and Forward Traffic ipv4 I test Gre tunnel Error: an IP address is expected rather than Gre in Ubuntu Donnot support ipv6 For local And Dst ...
Ramin Malekghasemi's user avatar
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76 views

How can I offer another interface IPv6 addresses?

I have two networks and their structures are as follows: (network A) ISP router --- (eth1) - Raspberry Pi - (eth0) --- other devices like PC, smartphone, etc. (network B) I want to assign IPv6 ...
noraworld's user avatar
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1 answer
503 views

Expose ipv6 to virtual machine

I have a root server with a single ipv4 address and a /64 ipv6 address range. On the server I have created a virtual machine (with multipass) for running a web server. For that I have created a rule ...
topskip's user avatar
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1 answer
283 views

Some internet services do not work when using my phone hotspot

I have a problem on Ubuntu 20.04.03 When connecting to the wifi through my phone hotspot some internet services such as Slack, Gmail or even Netflix, Prime video do not work. They either do not load, ...
Clunx's user avatar
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0 votes
1 answer
379 views

IPv6 not working on VMs created using multipass

Commands issued on the VM: $ ping -6 api6.ipify.org ping: connect: Network is unreachable $ ifconfig ens3 ens3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.140.84.221 ...
Dojo's user avatar
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2 votes
0 answers
2k views

Static IPv6 setup with netplan

After running in to upgrade issues (not able to retrieve https://changelogs.ubuntu.com/meta-release-lts) I found out that my static IPv6 setup caused this issue. However I'm stumped as how to fix it. ...
Remco J.'s user avatar

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