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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1answer
23 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 ...
-3
votes
0answers
12 views

Socks5 c access to IPv6 [on hold]

How to implement it? have a vps with one IPv4 and 256yu IPv6. IPv4 - 111.112.113.114 Ipv6 - 2a01: 212: 2: 1 :: 11 64 IPv4 should work as soks5, it ports 256 111.112.113.114:12000 ...
6
votes
1answer
825 views

Debian, 6rd tunnel, and connection troubles

Long story short, I am having issues with IPv6 using a 6rd tunnel with my ISP, Charter Business. They offer a 6rd tunnel that I think I have properly set up, but the server doesn’t reply to every IPv6 ...
24
votes
2answers
685 views

Isn't it a huge security issue to include the MAC address inside of an IPv6 address by default

Many times you don't want to be identified while surfing. For one thing your browsing history might be sold without your knowledge, and with no benefit to you.
4
votes
3answers
118 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 ...
0
votes
1answer
38 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
37 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
14 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 ...
1
vote
1answer
75 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
0answers
19 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
23 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 ...
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votes
0answers
27 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. ...
7
votes
4answers
5k views

Advantages of IPv4 over IPv6

In theory, how IPv4 is better than IPv6? I need only advantages of IPv4 for study purposes. In another words - what are the pros of IPv4?
5
votes
2answers
541 views

When do browsers request and use IPv6 DNS records?

I'm glad my new Linode hosted server offers an IPv4 and an IPv6 address as well. And default DNS records, when using Linode as NS, shows both A and AAAA records example.com 86400 IN A 203.0.113.4 ...
18
votes
2answers
4k views

What does [::] mean as an ip address? Bracket colon colon bracket

When I run netstat there are some entries such as TCP [::]:8010 computername LISTENING What does that mean? It is impossible to search for...
0
votes
1answer
35 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
30 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 ...
1
vote
0answers
28 views

How to setup an ad-hoc network in Ubuntu using IPv6 address? [migrated]

Please guide me to setup an ad-hoc network setup between two ubuntu linux machines with the IPv6 protocol. I believe this command will help me to configure an IPv6 address but what about the gateway ...
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votes
1answer
50 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 ...
26
votes
8answers
45k views

“ipv6 equivalent” of 192.168.x.x (configuring a static ipv6 address)

Background: I have a windows 2008 machine and I want to make it a Domain Controller in a test domain made of two virtual machines. dcpromo pops up a warning if IP addresses for the machine are not ...
1
vote
0answers
22 views

Native IPv6 on Debian Router [migrated]

After my old Tomato USB router died I started using an old netbook with Debian Wheezy installed as my home router. I have two WLAN interfaces and one LAN interface. wlan0 has internet access and wlan1 ...
1
vote
3answers
1k views

Linux server not receiving default IPv6 route over PPP link

I'm replacing a pfSense router in a remote office with a small linux device, running Debian. The router only has to handle very basic iptables / DHCP and VPN facilities. It is configured so that the ...
0
votes
0answers
42 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 ...
2
votes
3answers
1k views

setting static ipv6 address in ubuntu

I'm trying to add an ipv6 address to an already existing interface, which previouosly only had ipv4. This is my config: auto lo iface lo inet loopback auto eth8 iface eth8 inet static address ...
0
votes
2answers
1k views

/etc/init.d/iptables-persistent start returns fail but seems to work

I am trying to activate iptables-persistent on an Ubunutu server. Config files are located in /etc/iptables/rules.v4 /etc/iptables/rules.v6 I have installed the iptables-persistent package. ...
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votes
0answers
23 views

Postfix: Different outgoing IPv6 for multiple domain setup

I am serving 3 domains on my linux VPS using Postfix MTA. I have 1 IPv4 and over 65k IPv6 adresses. Because you need correct reverse DNS to avoid the spam filters I want to force Postfix to use 3 ...
2
votes
1answer
951 views

Windows 7 Client gets incorrect IPv6 Prefix Length

I am currently setting up IPv6 and DHCPv6 for Server 2008 R2 on my private network for testing. I was able to get DHCPv6 to work by configuring a static, then setting up the scope. I was also able to ...
0
votes
0answers
3 views

Running ipv6 tunnel on windows 7 alongside local dns server [migrated]

I am running an IPv6 tunnel via Hurricane Electric in Windows 7, which has been working fine for ages. My router does not support IPv6 at all natively. I am also experimenting with running a local ...
0
votes
0answers
17 views

IPv6 tunnel broker, other devices unable to access ipv6 internet [migrated]

I'm trying to use a Raspberry Pi to set up as a tunnel broker via tunnelbroker.net. I have a simple set up that looks roughly like this: Verizon ISP Switch/IPv4 Router | |----- ...
0
votes
0answers
6 views

IPV6 at home: my ISP delegates me a static IPV6 /56 subnet, how can I set up an IP scheme & DHCP6 for my network? [migrated]

My network looks like this: (Cable Modem/Router) <-> (PfSense Router) <-> (Internal Hosts) The IP (changed for security) of my cable modem is: IPv6 Address ...
0
votes
1answer
78 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 ...
0
votes
2answers
55 views

IP Address reassignation (unused Ip address)

Available IPv4 address blocks are exhausted and price per IPv4 address is increasing. However I read that 2/3 of IP address remains unused because they were assigned improperly at first stages. Since ...
1
vote
2answers
1k views

When does Postfix use IPv6 and when IPv4?

I've configured my mail server for IPv6 and IPv4 but in the most cases it uses IPv4 while IPv6 is available on the remote host. I use Postfix in version 2.9. So my thought was that postfix uses IPv6 ...
1
vote
1answer
43 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 ...
2
votes
1answer
2k views

Understanding DHCPv6 Stateful Solicit message

I have been reading the full RFC 3315 and trying to generated spoofed nodes to ask for IPv6 address. (only for practice) Right now, I have a Ubuntu with wide-dhcpv6-server (the DHCPv6 server), one ...
2
votes
1answer
77 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 : ...
1
vote
1answer
42 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 ...
0
votes
0answers
28 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 ...
0
votes
2answers
96 views

static ipv6 route into a lxc container

I want to route an ipv6 ip to a lxc-container, but the packets are not forwarded. I do not want to bridge the lxc-containers to eth0 and i do not want to use autoconfig. Further i only have a /64 for ...
1
vote
1answer
47 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 ...
15
votes
3answers
6k views

What is the IPv6 equivalent to IPv4 RFC1918 addresses?

Having a hard time wrapping my head around IPv6 here. A lot of the lingo seems targeted at enterprise-level IPv6 deployments, discussing link-local, site-local, global unicast, scopes, etc. Not a ...
0
votes
0answers
33 views

Clarification on Tinc VPN Configuration

I've been looking at docs like the tinc manual and Arch's tinc wiki page and am still somewhat mystified as to how to configure my setup. The hosts (all Arch or Debian linux or rooted Android) to be ...
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votes
3answers
232 views

Connectivity of IPv6 With IPv4 host

I'm recently working on a project, in which we are provided two network one with IPv6 Connectivity only and other with IPv4 Connectivity only. These two networks are connected to each other with a ...
3
votes
2answers
258 views

IPv6 tunnel broker setup

I'm working on a solution to allow remote Linux nodes that are behind firewalls to be accessible for SSH and web server. Can anyone suggest an IPv6 tunnel scheme that would work with NAT firewalls? ...
0
votes
2answers
100 views

Does one keep its ivp6 address on different networks?

Assuming I connect on a ipv6 network in Europe and do the same later in the US, I won't keep the ipv6 I was assigned in Europe for use in the US correct? One will be assigned a new ipv6 address at ...
1
vote
1answer
101 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
72 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 ...
0
votes
1answer
60 views

Binding stunnel on both IPv6 and IPv4

I would like to make a local unencrypted service that listens on 127.0.0.1:8000 available via SSL on both IPv4 and IPv6 on port 8001. Unfortunately, stunnel configuration [Server] accept = 8001 ...
1
vote
0answers
25 views

how to set “Accrept snmp packets from these hosts” with IPv6 address

As I understood SNMP service on windows vista and above supports IPv6. I would like to set the accepted hosts with IPv6 address, how is it done? Using the SNMP service configuration of windows there ...
0
votes
0answers
72 views

Apache Reverse Proxy with IPv6 troubles

Problem: IPv6 Client attempting to contact Server behind reverse proxy fails. In this example, client and server reside on the same machine. Client's IPv6 configuration: ip --oneline addr show 1: ...