IPv6 is the successor to IPv4. Rather than 2^32 addresses (like IPv4), it has 2^128, which is 340,282,366,920,938,463,463,374,607,431,768,211,456 unique addresses (34 undecillion). IPv6 addressing is quite different to IPv4 and is not backwards compatible, but protocols that sit on top (HTTP, SSH, ...

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-3
votes
0answers
47 views

ipv6 tunnel doesn't route

I'm trying to setup an ipv6 tunnel through Hurricane Electric's free service but not getting any positive results. I'll detail below what I've done and what I see currently. This machine runs OSX ...
2
votes
1answer
30 views

OpenVPN with mixed ipv4 and ipv6 clients

I have a VPN server handling various clients; some with ipv4 only, some with ipv4 and ipv6, and some that will be ipv6 only. Some of these clients are roaming, so ideally they should connect to ipv6 ...
3
votes
1answer
49 views

IPv6 issues with Server 2012

We have a Windows Server 2012 domain. The server acts as our DHCP and DNS. About 2 weeks ago, Comcast changed something in their router I believe, enabling IPv6. Since IPv6 was never initially set up ...
1
vote
1answer
22 views

IPv6 record will not take for rDNS

I added the following to named.conf zone "3IP6.A.B.C.ip6.arpa" { type master; file "3IP6.A.B.C.ip6.arpa"; allow-update { none; }; }; I then created my dns zone record called 3IP6.A.B.C.ip6.arpa ...
2
votes
2answers
80 views

Is IPv6 configuration important? [closed]

My website's server currently uses IPv4 only. I know IPv6 will be important in the future, but: Is it important to use IPv6 now? Does my website get less visitors if the server does not support ...
0
votes
0answers
9 views

IPv6 in a SOHO network [migrated]

If the router in my SoHo network (a Netgear DGND3700) doesn't support IPv6 is there any benefit at all in enabling IPv6 across the server and clients in that network? The successor to that one (a ...
0
votes
0answers
21 views

IPv6 upgrade broke my SPF? [duplicate]

I run a small custom ecommerce website for a client. I've recently migrated from Ubuntu 12.x to Ubuntu 14.x at a major cloud provider. This came with the benefit of a free/mandatory upgrade to IPv6. ...
2
votes
2answers
49 views

IPv6 Stateless Autoconfiguration route advertisements

In our network, we have a Cisco router acting as the core router, connecting all our sites to the main site. We also have a Linux firewall connecting us to the Internet. Site 1 --\ ...
1
vote
1answer
40 views

How to scan ipv6 enabled hosts on my LAN?

I want to discover all my neighbors who enabled ipv6 protocol and still alive. I tried ip -6 neighbor show but it shows nothing. Can someone recommend a tool and show some examples? Thanks.
1
vote
1answer
62 views

What kind of situations should I enable IPv6 in my linux server?

As we know, IPv6 module is installed and enabled by default in our CentOS server. But I have never use it and many articles tell us to disabled IPv6 feature for performance or security reason. So what ...
1
vote
0answers
24 views

Why privacy ipv6 address cannot connect the internet in guest vm

I have a guest ubuntu 14.04 installed in kvm, host is a fedora 20. The eth1 nic of guest is in macvtap bridge mode. Ubuntu default enables ipv6 privacy extension, and prefers the temporary address: $ ...
1
vote
3answers
19 views

Is there a way to allow all external ip connections (i.e ipv6 as well as ipv4) in FreeRadius?

I need to accept all incoming connections to the FreeRadius server be it ipv6 or ipv4. I know that we can allow all ipv4 clients with: client 0.0.0.0/0 { secret = abcde shortname = xxxx } How ...
0
votes
1answer
57 views

very long “connecting” in chrome using ipv6

A connection to an ipv6 subdobain www6.example.com takes very long. In chrome the net tab shows 20s spend in "connecting". All other times are much faster. However only the first two connections are ...
1
vote
2answers
107 views

Managing IPv6 rDNS

Still very new to IPv6 and I talked to my datacenter and they do not do rDNS for IPv6. Unfortunately we currently do not support rDNS for IPv6 allocations. We can however delegate the IP block ...
3
votes
2answers
93 views

Publicly routable IPv6 linux container

My goal is to have a routable public IPv6 address for each of my docker containers. I want to be able to connect into and out of my containers using the IPv6 protocol. I'm using Linode and I've been ...
0
votes
0answers
3 views

Execute script on ipv6 prefix change [migrated]

How can I execute a script or program whenever my (world-routeable) IPv6 prefix changes? If there is (currently) no easy way to do this, a pointer to the corresponding Posix system calls would be ...
1
vote
2answers
74 views

IPv6 PPP Link fails forwarding Router Advertisements into local LAN

A Debian Server having eth0, eth1. eth2, ppp0 devices: 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether xx:yy:zz:yy:xx:yy brd ...
1
vote
3answers
62 views

ipv6 to ipv4 translation in switch

I have looked for a solution to this problem but everything that I have found never seems quite match this scenario. I have a small colocation space and I only get 5 IPv4 addresses. I also get an ...
1
vote
0answers
66 views

IPv6 Client Service

I got a Windows Server 2012 which provides DHCPv4 and DHCPv6. The NIC on the Server got 2 IPv6 addresses. I found out that the second IPv6 comes from the "IPv6 Client Service" which (only the ...
0
votes
1answer
60 views

lighttpd does not start at boot after enabling ipv6

A few days ago I configured lighttpd to listen on my VPS IPv6 address as well. It runs on a Debian 7 Xen VPS (Linode) with a 3.15.4-x86_64-linode45 kernel. The version of lighttpd is 1.4.31-4+deb7u3. ...
3
votes
2answers
286 views

Do you need separate ipv4 and ipv6 listen directives in nginx?

I've seen various config examples for handling dual-stack ipv4 and ipv6 virtual hosts on nginx. Many suggest this pattern: listen 80; listen [::]:80 ipv6only=on; As far as I can see, this achieves ...
0
votes
1answer
72 views

ipv6 reverse dns not working unless +trace is specified

I'm trying to set up reverse dns for ipv6 in my lan. The dns server which should be delegated is at 2001:5c0:1400:b::9 and an host for which RDNS should work is at 2001:5c0:1500:300::1. The problem ...
0
votes
1answer
56 views

How to start with IPv6 subnetting on linux gateway

We are currently having perfectly working IPv4 network with a typical layout - internal network with all servers splitted to VLANs in 10.0.0.0/8 (each vlan is /24) and external network with public ip ...
3
votes
2answers
99 views

How to set the order of ipv6?

an output on my server shows IPv6 in the following order: inet6 addr: 2xxx:xxx:aaac:3e::10/48 Scope:Global inet6 addr: 2xxx:xxx:aaac:3e::1/48 Scope:Global inet6 addr: 2xxx:xxx:aaac:3e::2/48 ...
1
vote
0answers
40 views

Problem with v6 subnet routing

I have a freebsd machine connecting to my sixxs ayiya-tunnel. As I decided to implement IPv6 in our complete network and not only one interface I got myself a routed /48 from sixxs. I'll use ...
0
votes
0answers
47 views

flushed IPs - cannot acces to my server

Edit: If think that there is no problem with IP. However, there is something very strange. Indeed, I've no logs at all. The latest logs was when I restarted my server after removing IPs. OS: Debian ...
0
votes
1answer
50 views

IPv6 configuration - cannot ping

I am trying to configure IPv6 network first time in my live. I have got on my main server following interfaces: br1 Link encap:Ethernet HWaddr 66:ea:5c:99:08:f5 inet addr:192.168.0.1 ...
0
votes
1answer
38 views

XEN virtual machine with IPv6 but without IPv4

How should I create a new virtual machine using xen-create-image if I just got the IPv6 from my hoster? When I tried xen-create-image --hostname=s1.example.com --size=70Gb --swap=8Gb ...
1
vote
1answer
31 views

End-to-Edge Protection on DirectAccess

Learning about DirectAccess. This is a diagram of End-to-Edge protection Once the data goes in the corporate network, it doesn't matter whether the corporate network is running on IPv4 or IPv4. ...
11
votes
2answers
400 views

How to disable AAAA lookups?

... to compensate for broken DNS servers that are outside our control. Our problem: We deploy embedded devices that collect sensor data at various, mostly IPv4-only sites. Some sites have poorly ...
1
vote
1answer
54 views

How does this ipv4 network card understand this ipv6 listening server?

So, I just setup a new server on a droplet and looking at eth0 with ifconfig I can see that the network card is setup for one IPv4 address and one IPv6 address (IPv4 changed for protection): inet ...
0
votes
1answer
94 views

Server 2012 Obtaining DHCPv6 Address, but has static configuration

This is very similar to the problem I had with 2008R2 (Win2k8R2 Obtaining DHCPv6 address, but has static configuration), but that solution doesn't work with 2012R2. The box is a new 2012R2 domain ...
6
votes
3answers
328 views

Banning IPv6 addresses

I am currently accustomed to using tools like fail2ban to keep unwanted traffic away from my servers by banning IPv4 addresses: too many bad log entries per IP, ban the IP. However when the world ...
0
votes
2answers
44 views

Client access to IPv6 - estimates? [closed]

If I host a service over IPv6 only, what percent of clients will be able access it? I know about these measures of roll-out among ISPs: http://www.worldipv6launch.org/measurements/ And Google's ...
-1
votes
1answer
182 views

Ubuntu 14.04 dropping ipv6 route and ifstate

i have the following issue: i have configured my server to use IPv4 and IPv6. everything works fine. but now somehow IPv6 stops working. ip -6 route is not showing the correct routes anymore ...
1
vote
0answers
82 views

how to design network for virtual machines with just one nic

for the past week or so i've been recovering from the shock that i have literally no idea how my isp's network works, by getting a new box and trying to do a sensible design from scratch. our design ...
1
vote
1answer
57 views

IPv6 radvd with vlans

Is it possible to configure the radvd config so that the router advertisement packets got a VLAN- tag? Theres a switch between my Router (software router, Ubuntu OS) and I only want some VLANs to ...
0
votes
1answer
74 views

IPv4 Nating and IPv6 Bridging

We have only 5 usable static IPv4 IPs and many IPv6 static IPs. We want Multiple nodes/pc to be connected with Internet using nating/router because we have limited number of IPs. We would still want ...
1
vote
1answer
407 views

Debian up in /etc/network/interfaces not working

I'm trying to add a secondary IPv6 address to eth0 on Debian Sid. I added the following lines to /etc/network/interfaces: iface eth0 inet6 static address [IPv6 address #1] netmask 64 gateway ...
-4
votes
1answer
53 views

Do anycast addresses imply IPv6? [closed]

From what I understand, as a random user on the Internet, you cannot really know if an IPv4 address is unicast or anycast. However if you ping that IPv4 from two hosts physically located on two ...
0
votes
0answers
22 views

Assigning Outbound ipv6 Addresses to Users via Squid-Cache Proxy?

I know that I can assign ipv4 listening ports that route to outbound ipv6 addresses for connections to ipv6 sites using Squid-Cache but the problem is there's a limit on the amount of listening ports ...
0
votes
1answer
79 views

djbdns/dbndns dnscache query ipv6-only nameservers?

I have (attempted to) set up dnscache on Ubuntu 14.04 (Trusty) to do dual stack for servicing requests AND querying authoritative name servers. To be clear, I'm using the dbndns package, which has ...
0
votes
0answers
23 views

IPv6 several prefix advertisement Global and Local

How to advertise 2 prefixes by router advertisement in BSD for example: One for Local IPv6, and one for Global I need both addresses on my clients simultaneously.
1
vote
0answers
73 views

Squid Proxy: How to link inbound IPv4 ports to outbound IPv6 Addresses

I'm using Squid and I need to accept inbound connections on an ipv4 address using an ipv4 port that each user account link to an specific outbound ipv6 address. So for example I want to open port 4000 ...
0
votes
2answers
62 views

ip6tables drop connections after request on port 80

I have little problem with my Ip6tables. When i apply rules bellow, so everything is fine. After I try http via webpage, all ok. After I will return to SSH try and ssh is disonnected and browser dont ...
-1
votes
2answers
71 views

OpenBSD ISC-DHCP IPv6 not working?

How to enable dhcp for ipv6 in OpenBSD 5.5. Default dhcpd don't know about IPv6, it says that option -6 is incorrect and do not understand ipv6 config. But it has version 4.X that IPv6 must be enabled ...
2
votes
1answer
170 views

ipv6 and ipv4 server preference

A webserver I manage is running Ubuntu 14.04 and is configured for dual stack - ipv6 & ipv4. It is my understanding that ipv6 connections have first priority after which it should fall back to ...
3
votes
1answer
101 views

On IPv6 linux router, autoconf and accept router advertisements for single interface

Apparently right now if you have /proc/sys/net/ipv6/conf/all/forwarding set to a value of 1 that completely disables the auto configuration of Interfaces and routes, but I have a system with one ...
0
votes
1answer
74 views

Setting up IPv6 on Apache2

Currently I have the "ports.conf" with the following content: NameVirtualHost *:80 Listen 80 <IfModule mod_ssl.c> Listen 443 NameVirtualHost *:443 </IfModule> <IfModule ...
2
votes
0answers
61 views

Why “scope link” ipv6 address can be pinged via interfaces which they are not active on

[root@2_01 ~]# /sbin/ip -6 addr show pubeth0 inet6 2001:1::6/64 scope global inet6 2001:1::1/64 scope global inet6 fe80::20c:29ff:fe69:f9e8/64 scope link [root@v2_01 ~]# /sbin/ip -6 addr show ...