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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2
votes
2answers
42 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
22 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
154 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
33 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
30 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
55 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
68 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
96 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
53 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
18 views

Assigning random IPv6 ranges to ISPs as a security measure [migrated]

Pinging all the IPv4 address space takes about 5 hours (and can generate beautiful maps). Port-scanning doesn't take much longer and can reveal vulnerable services, such as remote administration of ...
0
votes
0answers
31 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
44 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
34 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
37 views

Android dhcp assigning bogus dns server [migrated]

I've been having problems with Android devices and DNS lookups on my WiFi network, so I've done some digging and found that android is assigning what appears to be a random link-local ipv6 address in ...
1
vote
0answers
32 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
32 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
30 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
78 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
28 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
27 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 ...
1
vote
1answer
66 views

IPv6: differences between “routed prefix” and “link prefix”?

What are the exact differences between "routed prefix" and "link prefix" for IPv6?How do these differences in a wireshark-Trace? (if you observe a Host with an assigned "routed prefix" or a Host with ...
0
votes
0answers
27 views

How can i configure a static ipv6-prefix to one linux host [duplicate]

I have a virtual Linux server (Kubuntu 14.04) and i will ask the hosting provider for a complete /64-Prefix for this machine (at the moment i have 4 individual IPv6-Addresses). How do i configure the ...
0
votes
0answers
65 views

Can ping from PC to cisco router's ipv6 address (from LAN side) but can't ping from one pc to other's ipv6 address

PCs are connected to Cisco switch and up link goes to Cisco 1841 router on router LAN side interface f0/0 ip add: 2001:xx:xx:xx:1000::64/120. IPv6 is not enabled. I am not able to give prefix length ...
0
votes
1answer
36 views

How to ping a host with different MTU size to simulate icmpv6 packet too big scenario?

As the Title states,I want to check whether my host will actually send a ICMPv6 packet too big if i send a packet with beyond the defined MTU size.I don't have a cisco router(extended ping) to try out ...
0
votes
1answer
43 views

Two global IPv6 addresses?

What is the scope of the second IPv6 address fdee:de36:ce2c:0:174:d4b5:64b7:33f9 ? Netsh confirms that both are global/public. Is there any reason I get 2 global IPv6 addresses? Wireless LAN adapter ...
0
votes
1answer
36 views

ipv6 static routing is not working

wondering ipv6 static route default route nothing working, only can ping the directly connected interface, but sh run command gave the static routes which I created to other networks, but on the sh ...
1
vote
1answer
80 views

DirectAccess: Client receiving icmp error from Ipv6 address

Pardon my naivety but I have never setup DirectAccess before, I've done some research prior and was unable to find a relevant resource. Let me provide a little background and then I'll jump into the ...
1
vote
2answers
75 views

Am I meant to allocate a /64 to every host?

I have been reading conflicting sources and seeing different behaviours about how a CPE router should be assigning IPv6 addresses. RFC3633 seems to imply that each host should get /64, while RFC6204 ...
0
votes
1answer
45 views

How to configure DHCPD server to bind static IPv6 address by DUID?

how can i configure the server to make static record DUID - IPv6 ? For example i have such DHCPv6 request: Client Identifier Option: Client Identifier (1) Length: 7 Value: 31303030303133 ...
0
votes
1answer
34 views

Windows translate external IPv6 to localhost IPv4

I have a machine running Windows server 2012, whose external IPv6 address is "2a01:4f8:190:7449::4". Let's assume it has no external IPv4 address, so the v6 address is the only way of accessing it ...
0
votes
1answer
62 views

How to disable temporary ipv6 address in win7?

I found that the ipv6 link local address was generated randomly in win7,not followed the eui-64 standard. Then I found this link and followed its guide. netsh interface ipv6 set global ...
0
votes
0answers
75 views

Does Cisco IOS support NPTv6?

I'm looking to do a small multi-homing setup which is currently achieved, with IPv4, using NAT. NPTv6 seems to be a good way to do this for IPv6 however I cannot find how to configure this on Cisco ...
0
votes
0answers
25 views

IPv6 DHCP for Hyper-V Guests

I have the following configuration: W2K12 with Hyper-V and DHCP Role installed, and I have IPv6 block. The goal is to assign IPv6 via DHCP to guest VMs, and make guest VM to have access to the ...
4
votes
3answers
153 views

Make reachable via a fixed address (e.g. IPv6) a server that is actually connected via a variable IPv4 adress?

Need: Internet host at a fixed IP address for full-stack self-hosting People want to perform self-hosting in an area where no ISP provide sufficient service with a fixed IP address. They provide one ...
1
vote
0answers
45 views

Ubuntu Router to connect two networks via IPv6

I am currently in the situation that I want to add one network of homogenous linux nodes to an already existing windows network. For administrative reasons the linux nodes are not going to be added to ...
0
votes
1answer
34 views

ip6tables snat don't work properly [closed]

I got three computers with these names: laptop, vds and home; vds is openvpn server; home is openvpn client. and, I got an ipv6 network 2a01:dead:beef::/64 vds has address 2a01:dead:beef::311 on ...
0
votes
0answers
37 views

Ip6tables firewall make server unreachable on reboot

I am trying to set up a very basic firewall on my server with iptables and ip6tables. My rules get loaded on restart with systemD. The OS is ArchLinux. When I just setup iptables everything works. ...
0
votes
1answer
180 views

My dns server default to link-local IPv6 address and it returns 1.1.1.1

I'm having this weird problem in my network after a power loss (few seconds) but all my network equipment has UPS and it was working fine when the power was out. Soon after the power was back I ...
1
vote
0answers
42 views

IPv6 Forwarding between interfaces

I am attempting to simulate an ipv6 wan (on an airgapped network). I have a CentOS 6 machine in the middle with eth1 and eth2 each pointing to an ipv6 network (call them "north" and "south"). North ...
-2
votes
1answer
71 views

How should IPv6 hosts register their name in DNS without using Active Directory?

I have about 25 devices on a complex network that is now IPv6 enabled. Since, in IPv6-land, we use names and not really long IP addresses, how are my boxes supposed to register their dns names ...
0
votes
0answers
99 views

Debian 7 (Proxmox 3.4-1) Venet IPV4/6 & IPV4 Bridge

I recently have been trying to get IPV4/6 working in my openvz containers (by venet) and as of now I have got them up (through trial/error and other data sources that I dont even recall at this ...
1
vote
1answer
71 views

Use manually assigned ipv6 address

I have a /48, and from this I assigned a /64 to this lan I have a windows 8.1, which I want to use an assigned ip for outgoing adress. But I keep getting an automatically assigned address. netsh ...
2
votes
1answer
110 views

Dual stack Lighttpd without repeating the SSL configuration

I'm trying out Lighttpd and I've stumbled across a small but very annoying problem; the IPv6 configuration is a total mess and requires you to duplicate your SSL settings two times; see for yourself : ...
0
votes
0answers
40 views

ISC BIND 9 not answering IPv6 queries

My ISC BIND 9.9.6 server is not answering IPv6 queries. I've done dig @::1 mydomain.org on the server itself and it times out. I've also done it using IPv6 DNS tools and everything fails. I do have ...
1
vote
1answer
121 views

ntpd servers stuck in init state when defined by hostname, but sync correctly when defined by IP address

I started having an issue on a couple of our colo servers which is causing a fair bit of head scratching. I as alerted to clock skew on a couple of servers, and when I went to investigate ntpq -=p ...
0
votes
1answer
122 views

How to configure dynamic DNS updates when using stateless IPv6 addressing?

I am using Server 2012 with AD/DNS/DHCP. I have successfully configured stateful DHCPv6 however this does not accomplish what I would like to achieve so I disabled it and I'm currently trying to get ...
1
vote
1answer
71 views

AD Dynamic DNS not working with Linux IPv6

I have an AD DNS/DHCP enabled server. I have mixed Windows and Linux machines/servers. IPv4 is working great with DNS/DHCP, even for the Linux systems. IPv6 is working great except that it won't ...
1
vote
1answer
164 views

Telnet over ipv4 proxy to ipv6 host

I have a dante socks server which is configured to listen in an ipv4 IP and to have an ipv6 external IP. I am trying to figure out how to verify if that really works. I tried to use curl but if I ...
2
votes
0answers
94 views

Server 2008 R2 NIC in “Unidentified Network” state after connectivity loss is restored

I am having trouble with 2 servers, both with the same symptoms. When they are reconnected to the switch after losing connectivity, they stay in an "unidentified network" state. Only after cycling the ...