Questions tagged [ipv6]

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

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Slow DNS lookup after upgrading to 14.04

After upgrading my Kubuntu to 14.04 from 12.04, I got extremely slow DNS lookup in Firefox and Thunderbird. I have checked the communications with Wireshark. Launching e.g. http://vs.hu in Firefox (...
brazso's user avatar
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6 votes
0 answers
3k views

How to use "docker.io" containers in Ubuntu 14.04 with IPv6? [closed]

I'm trying this: At the physical host with Ubuntu 14.04 (container's gateway for both IPv6 and IPv4), I tried: root@docker-srv-1:~# ip -6 a a 2804:XXX:4:acbd::1/64 dev docker0 Of course, host ...
ThiagoCMC's user avatar
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Does nmbd binds on a IPv6-Only network?

After moving my Samba to a IPv6-Only environment, nmbd doesn't start up anymore... I tried this: interfaces = 2001:db8:1:1::/64 and with this: bind interfaces only = yes... But, nmbd doesn't ...
ThiagoCMC's user avatar
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How is information passed between ipconfig and the init process at boot time

I'm trying to assign an IPv6 address to my machine at early boot time (in order to boot a diskless system over IPv6) with ip -6 addr add $ipv6/108 dev eth0 at nfs-premount. This works fine, but as ...
moritz's user avatar
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138 votes
3 answers
349k views

How to disable IPv6 in Ubuntu 14.04?

I am using Ubuntu 14.04. And I have done the following to disable ipv6. I have open /etc/sysctl.conf using gedit and paste the following lines at the end of sysctl.conf. net.ipv6.conf.all....
A J's user avatar
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33 votes
7 answers
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How to disable IPv6 when connecting to an OpenVPN server using Network Manager on a dual-stack system?

I'm using the OpenVPN client through the OpenVPN Network Manager plugin on a dual stack (meaning configured both for IPv4 and IPv6 connectivity) Ubuntu 13.10 to redirect all traffic through the VPN (...
Damn Terminal's user avatar
1 vote
1 answer
3k views

Set primary IPv6 address

I've got a /64 of IPv6 addresses available to one of my servers (Ubuntu 12.04). I'm binding them like this: auto eth0 iface eth0 inet static address xxx.xxx.xxx.82 netmask 255.255.255.248 ...
Dan's user avatar
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16 votes
1 answer
2k views

Diskless Boot with IPv6

At our work we are using around 80 diskless machines running Ubuntu. We want to make the transition to IPv6, so now I'm trying to get our diskless system to work with IPV6. The transmission of the ...
moritz's user avatar
  • 171
11 votes
4 answers
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How to make Ubuntu honor "ignore-hosts" proxy settings for IPv6?

I just typed under "dconf-editor", System → Proxy → ignore-hosts, the following content: ['localhost', '127.0.0.0/8', '::1', '192.168.0.1', '2000::/3', 'fc00::/8'] But, Google Chrome (and ...
ThiagoCMC's user avatar
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10 votes
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How to add two IPv6 dns-nameservers into /etc/network/interfaces?

With IPv4, I can add two DNS Name Servers without any problem, like this: "dns-nameservers 8.8.4.4 8.8.8.8" Then on my resolv.conf I got: nameserver 8.8.4.4 nameserver 8.8.8.8 BUT, ...
ThiagoCMC's user avatar
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-1 votes
1 answer
3k views

How to enable ipv6 support in linux system [duplicate]

I am trying to enable ipv6 support to my linux system. Im trying to modify /proc/sys/net/ipv6/conf/all/disable_ipv6 this file but system is not allowing to do so.
Abhitesh khatri's user avatar
1 vote
1 answer
7k views

whois with IPV6 support

I just tried a whois on an incoming IPV6 address. The whois program recommends an upgrade. But to what? I already have the latest version in the repo. Is there a different program for IPV4/6 client ...
j0h's user avatar
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9 votes
2 answers
2k views

How to disable NAT for IPv6 (NAT66)?

The current Ubuntu LTS does not support NAT tables for IPv6 (i.e. there is no ip6tables -t nat), and I'm fine with that, in fact, a NAT-less environment is the "core" of my networks. But, the next ...
ThiagoCMC's user avatar
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1 answer
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native IPv6 setup

I got following information from my provider: Range: 2a00:1630:2:801::/64 Gateway: 2a00:1630:2:800::1 Netmask: /56 My config file: iface eth0 inet6 static address netmask 56 gateway 2a00:1630:2:800:...
SuperUser's user avatar
-3 votes
1 answer
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Errors with VPS.ME Free

I need your help. I'm a total noob about Linux, thats why I need you to help me by telling me what to do, step by step. My problem is that I have only IPv6 from vps.me hosting and I want to ...
Bystry's user avatar
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0 votes
2 answers
46 views

How can I decide whether I care about a kernel vulnerability related to IPv6?

I've got some Ubuntu 10.04 and 12.04 systems that have an inet6 (IPv6) address. However, our firewall is configured to deny all and some pass rules are added for inet (IPv4) addresses. Do I need to ...
aiwilliams's user avatar
3 votes
1 answer
5k views

Can't upgrade procps on 12.04

If I'm performing apt-get upgrade I get the following error: Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be upgraded: ...
s1lv3r's user avatar
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0 votes
1 answer
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OpenVPN - Cannot browse ipv4 websites

I have set up an openVPN tunnel on my VPS (OpenVZ - Ubuntu 12.04). The problem is when I'm connected to the vpn, I can only browse websites which support ipv6 like google. Ipv4 sites aren't loading (...
jitowix's user avatar
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27 votes
5 answers
112k views

How to disable IPv6 on Ubuntu?

I disabled IPv6 on an Ubuntu box which has ssh and rsync running. But both of these are still listening on an IPv6 address. How should I fix this? [email protected]:~# sysctl net.ipv6.conf.all....
ACC's user avatar
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3 votes
1 answer
24k views

Curl with ipv6 not working by default [closed]

I am trying to curl ipv6 adresses, but without success. If i try lets say: curl https://google.com I wait for a timeout and get network unreachable If i force ipv4, everything is fine. curl -...
Zippie's user avatar
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4 votes
1 answer
2k views

Problems with updating Ubuntu

when i call sudo apt-get update the process stops at 98% [Connecting to security.ubuntu.com (2001:67c:1562::15)] and nothing else happens. i've already done this because of the IPv6 problems reported, ...
Peter's user avatar
  • 141
11 votes
3 answers
49k views

Trying to enable IPv6 results in a "No route to host" error

I'm configuring a dual stack network on a KVM server using static IPv4 and IPv6 addresses furnished by my provider. I input all addresses, nameservers and gateways as required when installing Ubuntu. ...
Alessandro Menti's user avatar
11 votes
3 answers
53k views

Disabling IPv6 on a single interface

I'm slightly weirded out by the fact that Ubuntu won't process ipv4 DHCP unless you explicitly tell it to, but will happily take ipv6 RAs unless you tell it not to. Is there any way to change the ...
ijw's user avatar
  • 249
74 votes
6 answers
219k views

How to disable IPv6 permanently?

How can we disable IPv6 system wide via terminal commands? I've read editing /etc/modprobe.d/aliases and replacing: alias net-pf-10 ipv6 with: alias net-pf-10 off alias ipv6 off Is this safe to ...
Tinfoilhats's user avatar
1 vote
1 answer
9k views

How to delete inet6 Link address automatically?

There is an inet6 addr on the eth0 interface: eth0 Link encap:Ethernet HWaddr 00:0c:29:d9:46:f5 inet6 addr: fe80::20c:29ff:fed9:46f5/64 Scope:Link UP BROADCAST RUNNING ...
tonybuaa's user avatar
3 votes
1 answer
727 views

IPv6 autoconfig isn't working on 13.04

I have several computers with various operating systems on my LAN, and one of them with Ubuntu 13.04 64 bit, is the only box that can't autoconfigure itself an IPv6 address. rdisc6 times out on it, ...
alisonc's user avatar
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3 votes
1 answer
2k views

How to enforce IPv6 source address selection with addrlabel at startup?

I have a system with a primary IP address of 2001:DB8:1::1/64. This IP is achieved via stateless auto config and is static for our purposes. This system has a routed IP block of 2001:DB8:2::/64. I ...
Justin King's user avatar
3 votes
2 answers
10k views

No answer section using dig

I've got an assignment from school to setup a DNS server with 2 name servers in ubuntu server using IPv6, but I'm not very good at it. When I use the dig command, It doesn't show an answer section. ...
Lewis's user avatar
  • 131
1 vote
1 answer
2k views

How do I configure IPv4 connection to use a DNS accessible only over IPv6?

I'm trying to make my system resolve IPv4 addresses over an IPv6 connection because my IPv6 connection is more secure (yes, it really is. Long story). The IPv6 nameserver resolves IPv4 addresses; it ...
Shnatsel's user avatar
  • 1,188
0 votes
1 answer
3k views

IPv6: ping6 from foreign host works, but cannot ping6 on same host

I have a strange issue with ipv6 on Ubuntu 12.04. There are two hosts, directly connected to the internet. Both have assigned a /64 network. They are properly configured with a /128 endpoint each ...
t2m's user avatar
  • 1
0 votes
1 answer
3k views

How do I configure ufw to only allow outgoing/established connections for a IPv6 network?

How do I configure ufw to only allow outgoing/established connections for a IPv6 network? I am using an old computer with 12.04 installed to create an IPv6 router for my local network. I would like ...
Corey's user avatar
  • 245
4 votes
2 answers
10k views

get apt-get stop using ipv6

I'm trying to use apt-get update or any other apt-get command it gives me this error: Hiba történt „2001:db8:dbb:1:1:1:1:221:8049” feloldásakor (-9 - A címcsalád a gépnévhez nem ...
NaGeL182's user avatar
  • 237
2 votes
0 answers
2k views

Stateless auto configuration IPv6 in ubuntu 12.04

I have installed ubuntu 12.04. i heard that ethernet interface automatically get a link local address but in my ubuntu box it's not getting link local address. Command ifconfig -a output Link ...
Sumit Kamboj's user avatar
2 votes
0 answers
126 views

a strange issue with ping6 using the 2001:db8: address [duplicate]

I have 2 Ubuntu machines one acting as IPv6 wireless router (running hostap and radvd on wlan0) and the other is connected to that router. The router wlan0 interface has the address 2001:db8:1:1::1/...
Ibra's user avatar
  • 29
4 votes
1 answer
3k views

Destination unreachable with ping6 between two local machines

I have 2 Ubuntu machines one acting as IPv6 wireless router (running hostap and radvd on wlan0) and the other is connected to that router. the router wlan0 interface has the address 2001:db8:1:1::1/64 ...
Ibra's user avatar
  • 41
3 votes
2 answers
7k views

Why am I unable to ping the same interface after configuring an IPv6 address

I setup IPv6 in my Ubuntu 12.04 on eth0 using command ifconfig eth0 inet6 add 2001:db8:fedc:cdef::1/64 but when i try to ping eth0 itself using ping6 2001:db8:fedc:cdef::1 it always gives PING ...
Sumit Kamboj's user avatar
2 votes
1 answer
1k views

How to setup IPv6 on ubuntu host with two VMs

I want to setup IPv6 network with two VMs(virtual box) on a ubuntu 12.04 host. One VM is backtrack and second is window XP. I want to know that how can i setup a fully IPv6 network so that i can ...
Sumit Kamboj's user avatar
11 votes
3 answers
36k views

How to remove the sit0 network interface?

when I type ifconfig -a, there is a sit0, why it is here, and how to delete it? sit0 Link encap:IPv6-in-IPv4 NOARP MTU:1480 Metric:1 RX packets:0 errors:0 dropped:0 ...
Yishu Fang's user avatar
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2 votes
1 answer
2k views

Why does IPv6 kill my network in Ubuntu 12.04?

Ok, so I have nice Ubuntu 12.04 headless server running. It's very happy. It's my router/firewall/DNS/etc. eth0 is WAN, eth1 is LAN. I can easily get my IPv6 Hurricane Electric tunnel connected, ...
Tymanthius's user avatar
2 votes
1 answer
7k views

Dual stack Apache

I have an Ubuntu 12.04 server with a number of IPv4 addresses and a /64 of IPv6 addresses. I have it responding to its IPv6 addresses with ping6. I'd like the domains hosted on the server to go dual-...
Dan's user avatar
  • 291
0 votes
1 answer
437 views

Can I install NetworkManager Version 0.9.6.0 on 12.04?

The NetworkManager Version 0.9.4.0 from Ubuntu 12.04 doesent support fully functional VPN Connections over IPv6. (see Do any NetworkManager VPN plugins support IPv6? ) On Ubuntu 12.10 with ...
rubo77's user avatar
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1 vote
2 answers
502 views

Firefox and IPvv6

I read that disabling IPv6 speeds up browsing and is recommended from a security perspective. Is this true? IF I disable it, how many sites will I not be able to access? According the Mozillazine, ...
notablytipsy's user avatar
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3 votes
2 answers
4k views

PDFs don't render correctly with Firefox and pdf.js

While using Firefox on Windows, pdf.js worked beautifully. It was honestly amazing. But on (K)ubuntu, it fails to render the files - not just some, but any (which is why I'm posting here). For example,...
notablytipsy's user avatar
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1 vote
1 answer
1k views

IPv6 tunnels - any easy way to turn them on and off?

I've set up a tunnelbroker.net (Hurricane Electric) IPv6 tunnel from my laptop running 12.04. Works fine, and allows me to test the dual-stack configuration on my remote webservers etc. until native ...
Rob Hoare's user avatar
  • 113
1 vote
1 answer
2k views

Squid3 dns resolution error

Squid3 on ubuntu 12.04 returns ipv6 addresses instead of ipv4. I have no ipv6 network therfeore connection fails. DNS resolution directly on the server returns ipv4 addresses.
agbmenu's user avatar
  • 93
1 vote
2 answers
2k views

ipv6 just wont go away 12.10 server

After very long time using Ubuntu old LTS version I have re-installed to new LTS 12.10, but I can't get rid of ipv6 ! I have did: in /etc/modprobe.d/blacklist.conf: blacklist ipv6 blacklist ...
VladoPortos's user avatar
1 vote
1 answer
8k views

cannot delete IPv6 default gateway

The commands below should be pretty self-explanatory. Please note that the route for which i get failure is obtained by RA and has very less expiry ( e Flag in UDAe). @vm:~$ ip -6 route 2001:4860:...
PnotNP's user avatar
  • 3,079
8 votes
4 answers
65k views

Have to run sudo dhclient eth0 automatically every boot

I just installed ubuntu 12.04.1 alternative install (for raid 0 on some disks). I Have some problems with the net. I'm at school, we use cable, and it got IPv6. If I run ifconfig eth0 heres my output:...
Fyksen's user avatar
  • 293
0 votes
1 answer
2k views

How to configure DNSv6 on a LAN without internet access?

I have a LAN of IPv6 enabled hosts. I would like to setup a ubuntu as DNSv6 server for the local LAN addresses (there is no internet/tunneling stuff). I could manually edit the etc/hosts file for ...
michelemarcon's user avatar
2 votes
1 answer
3k views

How to do a Port Proxy?

As some software doesn't listen to IPv6 port, we often do a port proxy to solve the problem. For example, the remote desktop in Win2003, we just run netsh interface portproxy add v6tov4 listenport=...
Frederick Zhang's user avatar

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