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Questions tagged [ipv6]

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

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Unable to connect (IPv6)

I couldn't find an answer or solution to my question in existing questions/answers on the net, so I have to write down my problem hoping that some expert spots the problem. Anyway here it goes. I ...
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Add a /64 range of IP addresses

I have a VPS that the provider allocated me a /64 block of IPv6 addresses, I'm trying to give each domain I'm hosting in it a unique IPv6 address. I'm using the configuration options in /etc/network/...
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699 views

IPv6 in an Ubuntu 16.04 Behind a Router

I'm running Ubuntu 16.04 behind a router. I can get IPv6 on the router working, but it fails on the client. If anyone has any input on how I can resolve that, I'd appreciate it. I can use either ...
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1answer
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IPv6 loopback route getting hit

Topology Trying to ping 2001:db8:cafe:2::1:171(Host3) from Host1 ping6 from Host1 to Host2 works ping6 from Host2 to Host3 works on Host1 I have a route to Host2 as follows: Destination -------------...
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1answer
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Adding IPv6 address results in deactivated WIFI

I tried: auto wls3 iface wls3 inet manual iface wls3 inet6 auto iface wls3 inet6 static address new_static_ip netmask 64 gateway fe80::1 after a service network-manager restart wifi isn't ...
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1answer
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I blacklisted IPv6. Want to undo

So, I followed this answer on this post and now I want to undo the changes. How do I even know something has changed? And if something changed, how would I undo it?
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Ubuntu 18.04 cloud image support for ip6_tables

I am running an Ubuntu 18.04 cloud server on LXD/LXC. # uname -r 4.15.0-30-generic # apt-get -y install linux-image-$(uname -r) It doesn't appear to have support for ip6_tables. How can I get an ...
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can't ping gateway from second ipv6

i have a ubuntu 16.0.4 and a /64 block of valid ipv6 to use. my ips : 2001:xxxx:yyyy:4::/64 my gateway : 2001:xxxx:yyyy:3::1 when i set fist ip to use via : ip addr add 2001:xxxx:yyyy:4::1/48 dev ...
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Lubuntu 18.04 can't connect to network with ipv6 method:ignore

I can't connect to network if i set the ipv6 method to anything else other than "shared to network" or "linked-local only". And when i set it to either. I get to connect but i cant ping anything ...
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55 views

How to configure more IPv6 addresses sooner at boot init time?

I have a full /64 of IPv6 addresses allocated to my VPS running Ubuntu Xenial Xerus Server Edition 16.04.4 LTS recently upgraded. I put my configuration of 15 IPv6 addresses (:1 .. :f) in /etc/network/...
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How to Forward traffic to the virtual interface from eth0 in ipv6 network

I couldn't get ip address on my virtual interface. After network sniffing, I realized that interface has no router advertisement (RA) messages. On my machine, I have two interfaces eth0 and wpan0 (...
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1answer
458 views

netplan gateway6 seems to have no effect

I'm trying to configure static IPv6 with netplan on a cloud server (public cloud from OVH) running Ubuntu 18.04 I have created a /etc/netplan/66-ipv6.yaml yaml file in addition to the existing /etc/...
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Does Ubuntu support Mobile IPv6?

I have a network running IPv6 connected to the internet through a router running Ubuntu Server 14.04. My laptop running Ubuntu 14.04 can connect to this network using either Ethernet or WiFi which ...
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1answer
950 views

Using IPv6 for SSH connections issues

I'm having issues understanding how to use the IPv6 protocol to connect to other computers over SSH. I tried just using the address provided from ifconfig but it doesn't seem to work, I keep getting ...
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1answer
448 views

Both static and SLAAC IPv6 address for a NW connection

I`m trying to have a workstation with (at least) 2 IPv6 addresses. One address would be a static manually configured IPv6 address and the other would be an auto-generated one from SLAAC (there could ...
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317 views

How to get /64 as prefix length when using DHCPv6 and radvd?

For our networking course we were asked to set up a DHCPv6 server in a virtual machine. I choose to work on a virtual machine(on VMware) running Ubuntu Desktop 16.04 and Lubuntu 14.04 as test client ...
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1answer
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How to set up IPv6 with netplan on Ubuntu 18.04?

I purchased a dedicated server installed with Ubuntu 18.04 which was given an IPv6 Block. I used the guide How to set up IPv6 on Ubuntu 16.04 before. Since Ubuntu 18.04 uses netplan instead of /etc/...
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NetworkManager: How to share internet connection with IPv6?

I have Ubuntu (Armbian) running on an Orange Pi, and I'm using NetworkManager's internet connection sharing to share a wifi connection with an attached wired ethernet device. (The "wired connection" ...
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Ubuntu 16.04.04 LTS -> Active-Backup Bond not working with IPv6

I have setup a server that has a Bonded connection. IPv4 works great, but for some reason IPv6 is not working at all. I can't even ping the router. I saw this was a known issue on https://bugs....
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1answer
685 views

IPv6 is working, but IPv4 isn't

I've got a new laptop running Ubuntu 16.04 that worked like a charm for a couple of weeks but has now lost its appetite for connecting to the internet via Wi-fi. I know it's not a problem with my ...
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1answer
74 views

Ubuntu Server 14.04: Communicating two vlans with ubuntu server as router

I've been searching through the internet for a while now. And trying things. I can't get this to work. I setup two VM's with virtualbox bridged to eth0 interface. One running Ubuntu Sever and the ...
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Huge difference in apt download speed on HTTP and HTTPS. Why?

I have a server (Ubuntu 16.04-3) with three virtual QEMU/KVM servers (2 x Ubuntu 16.04-3 + one Ubuntu 18.04 beta). Apt download on all the virtual servers is extremely slow from HTTP sources (~ 100kB/...
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662 views

IPv6 ping6 Connect: Network is unreach

I have docker running on a Ubuntu Server host 16.04.4 (Kernel 4.4.0-116-generic x86_64). Since my ISP has DS-Lite, I tried to set up IPv6 for the docker machines and am afraid I messed up things in ...
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1answer
898 views

Ubuntu 17.10: re-enable IPv6

After successfully disabling IPv6 using this script : echo 'net.ipv6.conf.all.disable_ipv6 = 1' >> /etc/sysctl.conf echo 'net.ipv6.conf.default.disable_ipv6 = 1' >> /etc/sysctl.conf ...
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1answer
370 views

SLAAC won't disable on Ubuntu 17.10

I cannot properly disable SLAAC on my Ubuntu 17.10 as there are always 2 dynamic addresses present. NetworkManager is not installed at all. /etc/network/interfaces only has loopback configured.
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1answer
326 views

How to fix Firefox so that it load certain sites like Netflix?

So, I've been having this issue with the Netflix site on Firefox on Ubuntu GNOME 16.04.3 64-bit. While any other site works flawlessly, the Netflix site didn't load with a weird "Server not found" ...
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1answer
101 views

Trying IPv6 through Miredo, IPv6-only hostnames not working as I would like

I was fooling around with IPv6 and Miredo as my ISP is IPv4 only. I have Miredo working and can do things like ping6 ipv6.google.com or open Firefox to URL http://[2a00:1450:4003:808::200e] But ...
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1answer
79 views

Does Ubuntu Core support IPv6?

Does Ubuntu Core support IPV6?
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1answer
320 views

What does the @ sign mean after a tunnel interface?

I previously asked a question on setting up a ipv4 to ipv6 tunnel. I answered my own question and this is configuration output from my previous question here https://askubuntu.com/a/992872/13903 4: ...
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2answers
1k views

ipv6 tunnel in Ubuntu 17.10?

I used to be able to do the configuration below with no issues in /etc/network/interfaces but now it's not picked up anymore. How do I configure a ipv6 tunnel now? I see see the new netplan software ...
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How to use nautilus for sftp over ipv6?

I can use the command below in a terminal to get sftp. sftp -6 username@ipv6address%eth0 But when I put in sftp://username@ipv6address/ I get an error saying, "unable to access location" "...
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Disable IPv6 on Ubuntu 17.10 (Netplan) [duplicate]

I'm trying to disable IPv6 on all of the adapters on an Ubuntu 17.10 machine. I used to be able to do so (prior Ubuntu versions) by editing /etc/sysctl.d/99-sysctl.conf to add disable parameters as ...
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1answer
212 views

Can connect, but no internet on Ubuntu 16.04, works fine on windows 10 (IPV4/IPV6 problem)

I am having problems with my internet connection on Ubuntu 16.04. I can connect to the wireless network but i have no access to internet, In my laptop i also have windows 10 and it can connect and ...
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1answer
100 views

DHCPv6 assigned 64 prefix instead of 112 prefix

I'm trying to setup my DHCPv6 on ubuntu to assign an address with a 112 prefix. My configuration looks like this: subnet6 2001:db8:a0b::640a:0/112 { range6 2001:db8:a0b::6464:640a 2001:db8:a0b::...
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1answer
357 views

Running IPv4 only application on IPv6 only network

I have an Ubuntu 16.04 machine connected to an IPv6 only network. One application I want to run on this machine appears to not work properly with IPv6. I know 464XLAT is supposed to make such ...
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0answers
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Ubuntu 16.03:IPv6 configurations

I am new in Ubuntu.I need to configure IPv6 in Ubuntu and realize the connectivity between two Ubuntus in two VMwares. I have read the Wiki,but just not have a clear idea. I think that I ...
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1answer
610 views

Why my options in the files in sysctl.d are not permanent? I need to run `sudo sysctl -p` often

Following some tutorials to disable ipv6 in my laptop (Ubuntu 16.04), I needed to write in /etc/sysctl.d/99-sysctl.conf the following lines: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default....
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ssh -6 localhost/<ipv6 ip>?

I am trying to ssh to my IPv6 PC from my ISP side but I could not reach. So I tried it in my IPv6 PC as # ssh -6 localhost ssh: Could not resolve hostname localhost: No address associated with ...
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1answer
612 views

IPV6 (web server is unreachable) and (No route to host)

I'm configuring IPV6 address in order to validate my application in App Store (require IPV6 Only network) This is my configuration, it seems all is correct. THIS IS MY NETWORK INTERFACE Screenshoot ...
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2answers
5k views

Ubuntu 17.10 VPN

Enabling VPN connection from the Network manager automatically add's IPv6 address to DHCP Wired connection even if it's disabled on the settings. This causes the VPN to leak on all DNS address queries ...
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1answer
3k views

How to add an IPv6 address and default route with netplan in Ubuntu 17.10 artful?

What is the proper way to configure basic IPv6 connectivity in Artful? Basically, what are the netplan equivalents to ip -6 addr add dev eth0 what::ever/64 ip -6 route add default via what::eve0 dev ...
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1answer
386 views

Why shows netstat an entry for ipv6 although it 's already disabled?

I've disabled ipv6 according to the description in: http://askubuntu.com/a/484487/229026, (As far I know, this article should also apply to Ubuntu 16.04) but netstat -nautp is still displaying the ...
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0answers
245 views

IPv6 extremely slow on Ubuntu server?

I'm running into an issue on my server where IPv6 is unbearably slow to connect (often timing out entirely). For example, a recent wget: --2017-10-01 20:12:49-- https://ci.somesite.net/file ...
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1answer
2k views

How to disable IPv6 on Windows Subsystem for Linux?

I tried to disable IPv6 by adding in /etc/sysctl.conf: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 and then running sudo sysctl -p to ...
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0answers
408 views

How do you hide ipv6 address using proxychains with tor?

When using proxychains with tor, I am able to hide my ipv4 address with a random ipv4 address, though when checking my ipv6 address on http://test-ipv6.com/ it still gives me my real ipv6 address. I ...
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2answers
114 views

Configuration to a hidden IPv6 network via wireless

I am trying to configure to a new router that requires a IPv6 connection, I managed to connect via ethernet modifying the interface file but I have big troubles in connecting via wireless. Could you ...
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1answer
733 views

Why does dig not use the right IPv6 DNS server?

My DNS configuration looks like this: $ systemd-resolve --status Global DNS Servers: 192.168.1.1 DNS Domain: house.lan ... Link 2 (enp11s0) Current Scopes: DNS LLMNR/IPv4 ...
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2answers
1k views

Unable to enable IPv6 for telnet server

I am trying to enable IPv6 on the telnet server running on Ubuntu 16.04, but I cannot. My configuration files look like the following. /etc/xinetd.d/telnet service telnet { disable =...
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1answer
1k views

Why can't I disable IPv6 on Ubuntu 17.04?

I have disabled IPV6 but still see traffic from my Ubuntu 17.04 machine. $ cat /proc/sys/net/ipv6/conf/all/disable_ipv6 1 $ cat /etc/sysctl.conf |grep ipv6 net.ipv6.conf.all.disable_ipv6 = 1 net....
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1answer
900 views

wget and ipv6 problem?

When I try to download via wget I must use --inet4-only option. otherwise I will get this: mobin@mobinuntu:~/Desktop/bbb/bb-kernel$wget https://releases.linaro.org/components/toolchain/binaries/6.3-...