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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916 views

centos: ping6 unknown host

I have centos 6.5 with ipv6 enabled and working (partially). When I'm trying to execute "ping6 bin6.it" it returns error "unknown host": [root@centos ~]# ping6 bin6.it unknown host Host is ...
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1answer
45 views

Debian - No wired connection after restart

Last night I was working on my computer, for reference I'm using i3, and decided to uninstall XFCE4, as I felt I didn't need it. The next morning I turned on my computer and have no wired connection. ...
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2answers
62 views

Resolving hostname takes 5 seconds

I've a master bind9 DNS server and 2 slave servers running on IPv4 (Debian Jessie), using /etc/bind/named.conf: listen-on-v6 { none; }; When I try to connect from different server(s) each ...
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2answers
131 views

How do I make OpenVPN split /56 IPv6 block into /64 subnets for each client?

I want OpenVPN to occupy, for example, 2001:0DB8:5912:1200::/56, assigning /64 subnets of it to clients (so they can serve as SLAAC routers if needed). What should I do? Is OpenVPN alone enough for ...
2
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1answer
161 views

IPv6 address changed after upgrade. Why? and how can I harden my .htaccess against this?

I noticed in my local webserver logs that the IPv6 address of my desktop changed after upgrading to Kubuntu 12.04. inet6 addr: identical:identical:identical:identical:changed:changed:changed:changed/...
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1answer
58 views

IPv6 ephemeral port range

In Linux, I can get and set the range of ephemeral ports through /proc/sys/net/ipv4/ip_local_port_range: $ cat /proc/sys/net/ipv4/ip_local_port_range 32768 61000 I want to control the ephemeral ...
2
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1answer
47 views

Unprivileged ping6 not working

I am trying to get my CentOS v7 server to run IPv6. Root works, it can ping using "ping6 ipv6.google.com", and ifconfig looks great; I see the lines: eth0: flags=4163<UP,BROADCAST,RUNNING,...
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OpenVPN with /112 IPv6 subnet, unable to route to eth0 and vice-versa

I'm trying to set up an IPv6-enabled OpenVPN server. The provider only gave me a /64 subnet : 2a06:1700:1::640/64. Here is the OpenVPN configuration : port 1194 proto udp dev tun0 server-ipv6 2a06:...
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0answers
23 views

Should DNS (PTR Records) be configured differently for different ipv6 networks?

I am configuring DNS forward and reverse lookup for IPv6(Redhat). For both /64 and /120 prefix i am using below configuration for PTR records. for address 6b00:8a00:a000:11a1::a2b:1c9f (Only a ...
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1answer
35 views

how do I add a second ipv6 address on Linux without making it default

I would like to add an extra IPv6 address so I can run a service on it but I want to retain the existing IPv6 address as the address to use for outgoing connections. When I add an ipv4 address with ...
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2answers
988 views

Link Local IPv6 address keeps being automatically assigned

I'm looking to prevent the IPv6 link local address from being randomly assigned. I'm not looking to disable v6 but rather statically assign my own link local. I've done ifconfig vboxnet0 inet6 add ...
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0answers
42 views

Generate IPv6 reverse PTR records for /64 subnet

I use SixXS and delegated the reverse PTR ip6.arpa zone to my own NS servers, so I am able to set up forward-confirmed hostnames within my subnet. This is great. A particular /64 subnet I designated ...
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0answers
17 views

BindAddress in ssh config on laptop

I have a section in my ~/.ssh/config for connecting to a server via IPv6. But as I have enabled privacy extensions for IPv6 and to avoid my ssh connections being cut I've added BinAddress to that ...
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0answers
11 views

IPv6 mapped address supported by the kernel?

How to know if the kernel currently supports IPv4 mapped IPv6 addresses ? I have tried using ping6 ping6 0:0:0:0:0:ffff:7f00:1 but I get Network is unreachable.
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1answer
20 views

Are IPv6 link-local addresses assigned by the kernel or by a userspace program

When IPv6 is enabled for an interface, it will get a link-local address assigned automatically based on the MAC of the network interface. But who assigns this address? Is it done in the kernel, or by ...
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0answers
44 views

Raspbian Jessie: /etc/network/interfaces doesn't apply inet6 address. How to diagnose?

I'm experiencing a strange issue, and I don't really know how to diagnose it, or how to fix it. My problem is, that the static ipv6 assignment that used to work suddenly isn't applied any more at ...
8
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2answers
64k views

Static IPv4 & IPv6 configuration on CentOS 6.2

I try to configure static IPv4 & IPv6 configuration on CentOS 6.2. The configuration below works perfectly : # ifconfig eth0 x.x.x.x/29 # route add defalt gw x.x.x.y # ip addr add dev eth0 XXXX:...
2
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1answer
59 views

Why are my if-up.d scripts running before DHCP(v6) has completed?

I'm using DHCP and have both IPv4 and IPv6. I want to run a script that updates an IPv6 DDNS service when my network is configured. I created a script at /etc/network/if-up.d/update_dns however this ...
2
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0answers
15 views

ipv6 rule priority duplication

When I add ipv4 policy rules using ip rule add the resultant rules get added to the end of the policy table with decrementing priority from 32767 eg: # ip rule add lookup 8 # ip rule add lookup 9 0:...
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0answers
40 views

How do I run a systemd oneshot service whenever my system gets a new IPv6 address?

I would like to run a systemd oneshot service whenever my system gets a new IPv6 address assigned to it from the network router (this would be on boot, and periodically throughout its uptime). ...
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3answers
3k views

How to disable IPv6 on OpenBSD?

I'm sure that in my network I will not use IPv6 only IPv4. So according to the KISS principle I will need to disable it. How can I do it? OS is OpenBSD 5.1.
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0answers
21 views

I am redirected to a router that is not part of my provider's configuration [closed]

Whenever I try to access a website with a .com domain it shows the 'unable to connect page' but when I access a site with my country's domain I get redirected to a Tenda 11N wireless router. I ...
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1answer
60 views

KVM bridged interfaces not going up - inet, inet6 , bridge

I am setting up KVM host which will have multiple virtual machines visible from the outside with a similar /etc/network/interfaces config to this one # The loopback network interface auto lo iface ...
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1answer
36 views

IPV4 getting removed after restart CentOS machines

I have CentOS machines (both 6.x and 7.1) and whenever I reboot them, automatically IPV6 is assigned to them and IPV4 is lost. Any idea why it is happening and how to prevent it? I Could not ...
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0answers
49 views

CJDNS `Network is unreachable`

I'm not shure if this question belongs here, but anyway. I was trying to run cjdns on my android phone (OnePlus One runnig CyanogenMod 13) (actually tried on several devices), but it ain't working. It ...
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0answers
41 views

Static IPv6 not retained despite configuration

I want one of my machine to get a static IPv6, which should be allowed by my ISP. When I configure the machine for a static ip, it works well for a few days/months, then I get assigned a different IP....
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3answers
17k views

How to add ipv6 default route

I have the following setup Linux 1 Linux 0 eth1 eth0-------------------eth0 14.14.14.80 19.19.19.20 19.19.19.10 2005::5/64 ...
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2answers
43 views

Fedora Core 4 won't get an IPV4 address

I have a fedora core machine, and it is picking up an IPV6 address, but not an IPV4 address. I have done dhclient -r eth0 but the ipv4 address has not come. I have reset the port using ifconfig, but ...
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0answers
62 views

How to avoid curl trying IPv6 name resolution

From a docker container when I try to curl 'another container name', curl first tries to resolve the name to IPv6. This causes few seconds delay because the web server is not reachable over ipv6. I ...
118
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9answers
67k views

Convince apt-get *not* to use IPv6 method

The ISP I work at is setting up an internal IPv6 network in preparation for eventually connecting to the IPv6 internet. As a result, several of the servers in this network now try to connect to ...
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0answers
185 views

OpenWrt wifi bridge with IPv6

I am running OpenWrt 15.05 on my WDR4300. My ISP is via cable with legacy-IPv4-only. For IPv6 connectivity I use HE.net tunnel to receive a static IPv6 /64 subnet. My office is in a different room ...
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0answers
119 views

Is there a browser that supports IPv6 Link Local addresses?

I'd like to know at last one browser that allows me to browse fe80::4216:7eff:fe9f:79ac%enp2s0f0, for example. I've checked there're many tickets open in bug trackers of big name browsers like Firefox ...
0
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1answer
11 views

How to disable autoconf feature of IPv6 usinf interfaces file?

I am using linux 3.2.0. I want to disable autoconf feature of IPv6. For that I have added following lines in /etc/network/interfaces file. iface inet6 eth0 static address <IPv6_address> netmask ...
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1answer
317 views

cannot read key “net.ipv6.conf.all.stable_secret” in sysctl?

I am running kernel version as followings on an Arch Linux computer: [root@router ~ ]$ uname -a Linux router 4.2.5-1-ARCH #1 SMP PREEMPT Tue Oct 27 08:13:28 CET 2015 and I noticed that every time ...
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1answer
50 views

Old IPv6 address does not disappear using another router

My computer connects to a router via an ethernet cable. I have then an global address IPv6 for example : a::face/64. Here is my network configuration at the auto-configuration mode : auto eth0 iface ...
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0answers
21 views

ipv6 connectivity problems

I've got persistent ipv6 problems with my laptop running kubuntu 15.10 : download speed is very slow, and some transfer just end up totally stalled or timed out (ipv4 runs perfectly fine). It's not a ...
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1answer
78 views

Linux routing IPv6 packets through incorrect interface

I have a Arch Linux system where link-local packets are not being routed properly. I have 4 interfaces on this machine (wan, lan0, lan1 and lan2). All three of the lanX interfaces are bridged together....
4
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1answer
149 views

Why are IPV6 privacy extensions not working in Arch Linux?

I have native IPv6 via my ISP, with a routed /64 block. IPv6 is working on my internal network. (ie. I can ping ipv6.google.com) All devices on the network have IPv6 addresses allocated, and with the ...
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1answer
38 views

Adding IPv6 breaks StackExchange [closed]

I added IPv6 on my Ubuntu 14.04.3 LTS laptop by adding an OpenVPN tunnel to my Ubuntu 14.04.3 LTS server that has IPv6. I am using masquerading on both IPv6 and IPv4. Using StackExchange used to ...
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1answer
46 views

Using IPV6 in Hetzener under KVM virtualization

I have a VPS which is being managed with SolusVM + KVM in Hetzener data-center. I got one IPv6 but don't know how set it up. I tried this, did not work for Debian 7 64 bit: iface eth0 inet6 static ...
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0answers
46 views

Manually configure Link-Local IPV6 regardless of ISP

The long and short of it is we have a system with a single ethernet port and we need to provide both an IPV4 connection (that can be completely incontrol of the user and varies per system) and we want ...
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0answers
55 views

DNS problem with ipv6 on centos6

I have a couple of open-stack instances that communicates with github.com. When any of these machines reboots , the file /etc/resolv.conf gets the ipv6 addresses of my DNS servers. Everything still ...
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254 views

Systemd networking: IPv6 networking not available at boot

I've a Debian machine running multiple static IPv4 and IPv6 addresses managed by systemd itself at /etc/systemd/network/10-static-eth0.network as follows: [Match] Name=eth0 [Network] Address=2a04:---...
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79 views

IPv6, dnsmasq dhcp-range

I'm trying to assign IPv6 addresses to my LAN clients with dnsmasq 2.62 on Debian Wheezy: enable-ra dhcp-range=interface:br0,fde4:709f:bee2:a87b::,fde4:709f:bee2:a87b::ff,ra-stateless The ...
3
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2answers
257 views

File exists error while restarting network interface (Debian)

I'm running a Debian GNU/Linux 8 server for school assignments. While trying to do service networking restart, it gave me this error: root@server:~# service networking restart [warn] Running /etc/...
2
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3answers
635 views

Validating IP addresses (IPv4 and IPv6)

Quite simply I'd like to verify that a string represents a valid IP address in a bash script. I think like many others I've fallen into the pitfall of trying to do this with a regular expression; ...
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0answers
136 views

why i can see ipv6 socket with ipv6 stack disable?

I try to disable complety ipv6 on a Linux Debian 7 (wheezy) However , things escape me. In my case, i test with grafana process (I have same issue with munin, rpcbind etc) Method 1 : with sysctl ...
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0answers
65 views

Unable to setup ipv6 on solaris 11.3

I am having some difficulty after moving to Solaris 11.3 and setting up IPv6 addressing. The interface I am using is net2. I have created an IPv4 address already on this. So to do this I would have ...
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110 views

IPv6 router advertisement seems to break OpenVPN setup

I have an OpenVPN setup on Debian Jessie, or Raspbian to be precise, that provides an IPv4 and IPv6 subnet for the clients. The server configuration of OpenVPN contains: dev tun server-ipv6 fdd2:af8b:...
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1answer
209 views

IPv6 delete route

Some times ago I played around with the IPv6 routes and I made confusion :) That is my routing table root@banana:~# route -6 Kernel IPv6 routing table Destination Next Hop ...