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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16 views

Bind, IPV6, and Out of Zone Data

I am running into some problems getting bind properly configured to support IPV6 hosts. IPv4 is working fine, no issues. My zone file has both IP4 and IP6 data intermingled which I believe should ...
1
vote
2answers
51 views

Configure IPv6 - CentOS OVH - Can't ping

I can't ping my IPv6 from outside and inside of the server, i can't ping any IPv6. My IPv6 : 2001:41d0:2:XXXX::/64 I use CentOS 6.6 with a Xen Kernel that supports IPv6. My provider is OVH and i ...
3
votes
1answer
99 views

IPv6: ip-based or name-based vhost?

With IPv4 the recommended type of vhosts is name-based since you need only one IPv4 address. IP-based vhosts should only be used if name-based doesn't work (because of TLS for example) With IPv6 ...
0
votes
1answer
38 views

IPv6 Vs IPv4 for geolocation

disclaimer at first : this question is from a noob on IPv6 topic. Our web server initially had IPv6 active and Nginx not configure properly so the users with IPv6 got an error and website did not ...
-1
votes
0answers
30 views

How can i ssh with my ipv6 via putty [closed]

i configured my sshd_config as : AddressFamily any ListenAddress 0.0.0.0 ListenAddress :: ListenAddress [2001:bc8:2095:101::5]:512 i cant connect via putty. I tried the address without a ...
0
votes
1answer
22 views

Can't ssh after configuring sshd_config

I have configured my sshd configuration files to listen to ipv6 addresses, but forgot to uncomment ipv4 local addresses. Here is a snippet from my configuration file: AddressFamily any ListenAddress ...
0
votes
0answers
4 views

Access IPv6 computer from IPv4-only network. Is it possible? [migrated]

I recently changed from an ADSL 10 MB to a GPON 40 MB and since then I'm having a bad headache. My old ISP (ADSL) gave me always a valid public IPv4. Sometimes it changed but there was no problem ...
10
votes
2answers
1k views

Prefer IPv4 incoming connections over IPv6

We run a social/local service that benefits from geolocating the IP of users. The problem is that with IPv6, geolocation is quite a bit spottier than with IPv4. Is there a way to prefer incoming ...
0
votes
2answers
55 views

Delay associated with AAAA request

I have a standalone, isolated network running mixed Windows and Linux systems, with a Windows 2008 R2 server performing AD duties and DNS. I'm seeing 5-second delays with the use of getaddrinfo on ...
1
vote
0answers
39 views

Ubuntu 14.04 ignoring SLAAC IPv6 configuration

I am having issues getting an Ubuntu 14.04 server to pickup an IPv6 address through SLAAC. I have gone through the process of changing all the configuration settings I could find through google, but ...
2
votes
1answer
22 views

Apache VirtualHost wildcards with IPv6

Using Apache 2.4 on Ubuntu, I have the following in ports.conf: Listen XX.73.44.57:80 Listen [2001:XX:0:2c38::39]:80 <IfModule ssl_module> Listen XX.73.44.57:443 Listen ...
-1
votes
0answers
32 views

Tunnel ipv4 over ipv6 only network

I have a rather weird scenario and I'm wondering what is the best solution. It is as follows: I have a gateway which is only reachable via ipv6 from the internet, internally there is ipv4 and ipv6. ...
1
vote
0answers
86 views

Ipv6 over bridged network stops working after some time (Ubuntu LXC)

i hope you can help me. I am running several Linux Containers on a bare metal server which is provided with an Global Ipv6 address as well as an 64-bit network by my provider. I have configured IPv6 ...
3
votes
2answers
184 views

Why does ip6tables -A INPUT -j DROP blocks outgoing server connections

I'm willing to configure both iptables & ip6tables for IPv6. But for some unknown reason last ip6tables rule in my config block any outgoing connection for my server (apt-get, wget, ping, ping6 ...
0
votes
1answer
46 views

IPv6 users see different site than IPv4 users [closed]

I had a site hosted on 1and1 that I moved to an Azure VM. I found that some people who have IPv6 enabled in their routers (not sure if that's the only situation but it's the one that I came across) ...
0
votes
0answers
59 views

OpenVPN can't ping host outside local network

After an entire day spent to let openvpn's client get their ipv6 and ipv4 at the same time now i have a big problem. ipv4 works fine From my openvpn server i can ping6 every host From my openvpn ...
0
votes
1answer
62 views

nginx won't listen ipv6

I'm running a nginx server (1.8.0) and I want to listen both in ipv4 and ipv6. But even with the right listen statement (and a restart of nginx of course) a netstat -tlp | grep nginx return tcp ...
0
votes
1answer
16 views

ipv6 address configuration on serial interfaces

I tried to configure Ipv6 static routing on three routers, I configured ipv6 addresses on all three routers using ipv6 address auto config, The middle router have been configured with different global ...
2
votes
1answer
63 views

IPv6 web server unreachable

I've bought a new dedicated server with 2 IPv4 addresses and a /56 IPv6 subnet. When I ping to my domain names on the dedicated server I get a message back. But when I ping from outside nothing ...
0
votes
0answers
35 views

NGINX doesn't start on CentOS 7 reboot (fail on try to bind ipv6 address)

I have installed nginx / 1.8.0 on my server (CentOS 7.1), but does not start automatically after restart due to this error: 2015/06/20 10:34:11 [emerg] 827#0: bind() to [ipv6-address-here]:80 failed ...
0
votes
1answer
26 views

OpenVPN ifconfig-ipv6 in TAP mode

I want to set up IPv6 address on my OpenVPN server operating in TAP mode. According to documentation, ifconfig expects two parameters: l and rn. For TAP devices, l is local address, rn is netmask. ...
-1
votes
1answer
23 views

ufw status (what does the v6 stand for?)

My ufw status output looks like this: To Action From -- ------ ---- 22 ALLOW Anywhere 80/tcp ...
2
votes
1answer
121 views

Are there any use cases for supporting zone ids for public ipv6 addresses?

I am testing a product made by a vendor for communicating with external servers with public IP addresses. When testing the product I noticed that IPV6 addresses with zone ids, e.g. ...
0
votes
1answer
15 views

IPv6 dead before receiving ICMPv6 ping

TCPv6 and UPDv6 are dead until server received ICMPv6 ping. Further analysis shows that actually TCP and UDP packets won't even come to the server. But after receiving ICMPv6 ping, everything starts ...
0
votes
0answers
19 views

mac osx ping6 only with sudo?

today I encountered a weird problem on Mac OSX 10.8.5 and IPv6: I tried to ping6 a host that is known to be up and running (I am connected to the host in question through ssh using the same remote ...
1
vote
1answer
57 views

Force use of IPv6 address over IPv4 address

I'm attempting to serve a website from a machine that only has an IPv6 address. I have purchased a domain name and changed the AAAA record of the DNS resource record to my IPv6 address, and have ...
0
votes
0answers
39 views

Make LXC containers directly accessable with ipv6

First off I have a special IPv6 address allocated to my dedicated server, just 1. A ::1/128 one. But I can assign addresses to eth0 (eg ::2/128, ::3/128, etc). Now I would like to run LXC containers ...
1
vote
1answer
34 views

Cant set IPv6 Address on centos6

Im having this issue recently. the iproute2 utility cant add a ipv6 address /sbin/ip -6 addr add 2001:0db8:0:f101::1/64 dev eth0 RTNETLINK answers: Invalid argument that ip is just copied from ...
1
vote
2answers
98 views

What is the ipv6 equivalent of 0.0.0.0/0

When describing IPv4 networks, I can use 0.0.0.0/0 or just 0/0 to specify all networks. What is the equivalent notation for IPv6?
0
votes
1answer
62 views

How to assign multiple IPv6 Alias addresses to one network interface

I have an IPv6 Range which i am trying to assign on a centos6 server. I have updated my below files for IPv6 configuration: [root@test ~]# cat /etc/sysconfig/network NETWORKING=yes ...
0
votes
1answer
50 views

IPv6: I'm confused about addresses [closed]

I'm starting studying IPv6 and I'm having some troubles understanding some aspects. Let's clarify if I'm getting this right! A single host may have: - a unicast global address - a link local address ...
1
vote
2answers
89 views

How do I send network packets from an ipv4 address (with port forwarding) to an ipv6 address (no port forwarding) without STUN?

* I have the following situation: * Bob wants to interact with Alice directly (encrypted interaction, no intermediary server who will forward his packets). Both are behind NAT. Alice has a public ...
1
vote
0answers
15 views

Custom IPv6 stateless autoconfiguration suffix [duplicate]

When a router announces an IPv6 prefix via Router Advertisements, a host can use SLAAC to automatically derive the remaining bits from its MAC and use the combination as its globally routable IPv6 ...
1
vote
0answers
28 views

More Than One Static Address Binding for DHCP?

I have my DHCP server setup to be connected to three subnets (ie: 2001:abab:1234:1:: or 2001:abab:1234:2::) using three unique IP addresses, except in DHCP server binding properties I can only see one ...
3
votes
1answer
187 views

IPv6: No NAT / Local Addressing + ISP Offline

I've been reading some articles about IPv6 and I'm currently playing with some addresses on a VPS. Recently I was thinking on a typical home/office IPv4 network. We're used to have a local DHCP ...
0
votes
1answer
72 views

Bind9: Master->Slave Notify IPv6 with fallback to IPv4

I've a small Master->Slave DNS scheme setup between two machines running Debian 8 + Bind9 in dual IP stack. The master and the slave both own an IPv4 and IPv6 used by bind, enfored by the ...
1
vote
0answers
51 views

Windows Server 2012R2 DHCP Scope Preference

I have three scopes setup in DHCP. Subnets 0, 1, and 2; setup with the preference of 1, 2, and 3 respectively. Yet when I tell a client to renew its address it gets an address from subnet 1. What is ...
0
votes
2answers
83 views

Apache 2.2 won't start with an ipv6 address [closed]

I'm trying to only allow the localhost on a certain folder, it works perfect with ipv4 (Allow from 127.0.0.1) but as soon as I add ipv6 (Allow from [::1]) my Apache won't start anymore. I checked the ...
3
votes
1answer
188 views

Disable DHCPv6 client in Windows

I don't quite understand the link between 4 parameters related to IPv6 stateful and stateless autoconfiguration used under netsh int ipv6 set interface command context in Windows: advertise ...
2
votes
2answers
119 views

Why is 2002:: an invalid IPv6 addresss?

I'm currently learning IPv6 and during a test I tried to configure an interface with the global IPv6 address 2002:: and failed, stating that is an incorrect address. And I have noticed that if I try ...
1
vote
2answers
150 views

DNS: Root hint server 2001:500:1::803f:235 must respond to NS queries for the root zone

We are using IPv4 in our company. Our ISP does not provide IPv6 and this won't change in the next years. The Best Practices Analyzer (BPA) of our Server 2012 R2 DNS server warns about the IPv6 DNS ...
0
votes
0answers
79 views

IPv6 with IPv4 over RRAS SSTP VPN from Client that only has IPv4 access

I'm setting up Server 2012 R2 RRAS to be a SSTP VPN. I've got IPv4 working perfectly. My environment is dual stack (v4 and v6). When I enable IPv6 on the VPN my client gets a valid address but is ...
1
vote
0answers
67 views

Linux ipv6 forwarding

Situation I know how to do ipv4 forwarding, and expected ipv6 forwarding to work pretty much the same way. So I configured a VirtualBox host with the network address configured from my ISP. Right ...
0
votes
0answers
90 views

Setting up OpenVPN with IPv6 drops packets

I have tried a multitude of OpenVPN tutorials with zero luck getting OpenVPN up and getting clients to talk to the internet with IPv6. However IPv4 works just fine. The server is Ubuntu 14.10 and ...
1
vote
0answers
50 views

DNS not working with Ipv6

I'm trying to configure bind for ipv6 protocol.I have added the entries to the zone and configuration files but still the ipv6 IPs are not returned when i try for nslookup.Can someone guide me to ...
0
votes
0answers
69 views

How to configure DHCPv6 and DNSv6 configuration in Ubuntu 12.04?

I'm planning to configure DHCPv6 and DNS server in my network. I would like to understand whether both DHCPv4 and DHCPv6 can be configured using isc-dhcp-server service? When i tried nslookup ...
2
votes
1answer
38 views

Identify individuals behind SLAAC addresses

We're operating an IPv4 network (on ethernet & Wifi) in a student dorm with ~200 users and want to deploy IPv6 in the long term, with stateless autoconfiguration on a single /64 prefix. ...
-3
votes
3answers
103 views

Domain’s NS accessible via IPv6 only [closed]

Imagine a level-2 domain where some (albeit not all) NSes haven’t any A record but have AAAA instead. In other words, some NSes are accessible via IPv6 only. Ī mean, something like: @ IN ...
1
vote
1answer
47 views

How do I get puppet master to listen on IPv6?

So I have a RHEL 7 server on an internal network with IPv6, and I am able to SSH into it via IPv6 and it is also serving DNS to other hosts over IPv6. I have noticed that puppet master bind to IPv4 ...
-1
votes
1answer
45 views

IPv6 connections from outside the LAN are timing out; what is blocking the connection?

as I understand with ipv6 there is no NAT so every client on a network will get a different public ip address (so there is no need for port forwarding). so I checked on my network and indeed every ...