IPv6 is the newest version of the Internet Protocol. It is designed to supersede IPv4 as it offers many more addresses.

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How to IPv4 through IPv6?

My ISP (Unitymedia Germany) tunnels IPv4 traffic through slow and unstable CGNAT (they call it "AFTR", which seems to be a similar thing) but comes with reliable and native IPv6. Now, is there any ...
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31 views

What do I need to do to make IPv6 devices globally accessible using Uverse 6rd?

Summary: With UVerse's 6rd implementation, do I need to buy/install/configure a compatible wireless router in the DMZ to properly handle the IPv6 traffic in both directions (incoming connections too)? ...
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1answer
74 views

Throttled download speeds on new router with Comcast (ipv6 vs ipv4)

Issue with Comcast cable on Linksys or Cisco routers (and others) involving throttled download speed on ipv4. I recently upgraded my internet service to 100+ Mbs and also upgraded my router to ...
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19 views

Block (nullroute?) an IPv6 hostname using /etc/hosts

I'm trying to prevent my web browser from communicating with certain hosts (mostly ads and tracking). I have a list of such hosts in my /etc/hosts file. For IPv4 I can do: 255.255.255.255 ...
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2answers
33 views

IPv4 and IPv6 from different browsers on same computer

On my laptop, in Chrome, when I Google "What is my IP?", I get an IPv6 returned as my public IP address. On the same laptop, in Firefox, I Google the same thing, and get an IPv4 returned as my public ...
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1answer
36 views

IPv6 Web Site, But Fails IPv6 Readiness Tests

This is driving me bonkers. I have a Windows Server 2012 R2 machine running IIS 8.5. IPv6 is working fine on this machine. All the IPv6 test sites I browse indicate this machine is indeed running ...
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1answer
22 views

IPv6 network config on virtual box running two Srv2008R2 and Win 7

am trying to set up a test network on my windows 7 laptop to run in an IPv6 environment. basically i have downloaded virtualbox 4.3.12 latest version then created three virtual machines, two are ...
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14 views

windows 7 has ipv6 connectivity but not v4

My wife's windows 7 laptop had network connection problem out of the blue yesterday. It can access google sites like youtube, but nothing else. When I troubleshoot, I found that it has IPV6 ...
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19 views

Linux Networking: How to forward incoming IPv6 connections from the internet via a second IPv4 interface to other computers in a local network?

I have some kind of Debian server-gateway-zombie that has two network interfaces: eth0 and wlan0 (yeah, wlan0... I know.). eth0 is connected to a internet cable modem that assigns an IPv6 address to ...
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1answer
46 views

ipv6 ping host got destination host unreachable until run tcpdump

At first (all computer booted) when I ping the gateway (linux computer, two network cards(one is usb)) from a windows computer, I got: "Destination host unreachable", but when I run "tcpdump -i ...
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1answer
48 views

FTP: Unable to connect times out on directory listing

Been going round in circles for this for days now and i'm really stuck. My ftp had been working fine through filezilla, and through the ftp interface in PHP Storm Then all of a sudden the next day i ...
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34 views

IPv6 automatically gets disabled after every second reboot

I'm trying to set a static IPv6 address on Windows 7 and I connect just fine. But after 2 reboots (not one), it disappears. After much troubleshooting, I also see the DisabledComponents reg key ...
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1answer
68 views

Will I be able to register my own IPv6 address as an individual?

I know that at this moment, for all practical terms it is almost impossible to register a small portion of IPv4 addresses as an individual or even a small scale corporation. My question is if the ...
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1answer
35 views

Firefox and Chrome redirecting IPv6 to Google search

There are already answers how to teach those browsers to resolve the targets (enable ipv6 dns), but my problem is, when I enter an address (including http): http://2001:db8:0:1::10:1ff ...
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1answer
37 views

IPV6 DHCP server configuration

I'm new to IPV6. I'm trying to configure IPV6 server on my Linux VM using isc dhcp. we have the following content dhcpd6.conf file default-lease-time 600; max-lease-time 7200; log-facility local7; ...
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1answer
38 views

How can you access your router via IPV6?

Okay, first I wanted to do this just for the lulz, now it is a matter of principle because I need to understand it. My Router supports simultaneous IPV4 and V6. For thus, I have 2 default gateways: ...
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18 views

How can I test IPv6 security with a mikrotik router?

Noob here. I'm experimenting with IPv6, and I want to test security and encryption. Does anyone know if there is some way to send a secure test packet between my computer and Mikrotik router? ...
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1answer
116 views

Setting up IPv6 internal network with WiFi access point

first of all I'm completely new to ipv6 so please forgive me if I'll say something stupid. I'm trying to setup an ipv6 internal network to test an application I wrote ( yeah I can code for ipv6 but I ...
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1answer
46 views

How do I configure a mikrotik router to run on IPv6?

I am experimenting with ipv6 and would like to connect to my Mikrotik router via ipv6 on a local level. This would include connecting to it by an ip6 address, and interacting via icmp6. I have ...
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22 views

Gogoc and OpenVPN - can't seem to make them work together

I have a problem with my setup and I was hoping you guys could help me figure out what I should do. I'm currently running a 6LowPAN using RaspberryPi and Arduino nodes. Since I don't have native IPv6 ...
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34 views

PPTP VPN only using IPv6 Connections?

I followed this tutorial to set up a PPTP VPN: https://www.digitalocean.com/community/tutorials/how-to-setup-your-own-vpn-with-pptp Once complete, I connected to it with my desktop and noticed I ...
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56 views

IPv6 configuration: ISP is blocking Neighbor Discovery

My ISP offers IPv6 to interested customers, but doesn't provide any support in this regard. I've been given a /64 prefix (let's call it 2345:6789:11:22::/64), a gateway address (2345:6789:11:22::1) ...
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22 views

How do i get pdnsd to cahce both ipv4 and ipv6 records and use what's available?

This is how i run pdnsd mostly: pdnsd -4 -c /etc/pdnsd.conf -d -muo Unfortunately for some websites it looks for an AAAA record vs an A record and because AAAA is not cached by pdnsd it takes time. I ...
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3answers
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PTR record and A record should match. What if there is no A record?

If I understand RFC1912 section 2.1 correctly, these rules apply for PTR records: 1) Every working IP should have a PTR record 2) PTR and A records should match (although this is not checked ...
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1answer
96 views

Configuring a static IPv6 address that inherits delegated prefix

My ISP (comcast) delegates a prefix, my router is passing along the prefix delegation (pd) onto the LAN. My Debian machine is getting the prefix and appending using EUI-64 address. That's nice but not ...
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2answers
148 views

Get IPv6 correctly through another router

My ISP is Unitymedia NRW, Germany. It it a cable (like TV) ISP which has given me a Technicolor TC7200 modem/router. The ISP uses DS-Lite, so I only have a public IPv6 address, and no IPv4 address. ...
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1answer
35 views

IPv6 gateway configuration

I'm running a dedicated server at OVH with 16 virtual machines on vmare ESXI. The vms are running debian 7. Network 2001:xxx:2:9508::/64 Gateway 2001:xxx:2:95FF:FF:FF:FF:FF according to the OVH ...
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1answer
66 views

Configuring IPv6 on Debian - Global temporary address

My mac generates a daily temporary ipv6 for outbound connection usage, is there something similar that's available on Debian? Thank you! -Pablo
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2answers
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Running DHCP for ipv4 and ipv6 on different servers in the same network

I have a network where ipv4 addresses are assigned via DHCP on the router. The router, however, is capable of routing ipv6 but does not support ipv6 DHCP. Would running 2 DHCP servers (one for ipv4 ...
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What's the responsibility of an IPv6 owner?

Living behind a consumer-grade router for the memorable past, I guess I took the side-effect of NAT for granted, in that I had the burden of forwarding ports when I needed to, instead of have to ...
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1answer
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IPv6 subnetting - coverting decimal to hexadecimal

I came across a question on IPv6 subnetting, You work as a branch network administrator of a large company with offices in many cities around the world. The corporate network is currently in ...
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53 views

Why does Google Chrome listen on port 8000?

Occasionally when starting up a development server (again), it will die with the message that the port 8000 is already in use. Running $ lsof -n -i4TCP:8000 | grep LISTEN then reveals Google ...
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1answer
52 views

Is it possible to get two IPv6 networks to communicate over IPv4 Internet in this case?

I have a setup of a laptop connected to a cellular IPv4 network (3G usb dongle) and PC connected to another IPv4/IPv6 network. Both have been configured to run as IPv6 routers and each has its IPv6 ...
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1answer
75 views

Getting LAN clients to use IPv6 tunnel of Debian router

I have a Debian Jessie powered server which acts as router for our home network. I have succesfully managed to set up an IPv6 tunnel using TunnelBroker and traceroute commands return succesfully. ...
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1answer
65 views

Enabling IPv6 causes certain websites to go dark?

I'm trying to enable IPv6 since my new ISP (CenturyLink) supports. When I do, however, I am unable to connect to half the websites I visit, even if they're well known and well developed. (Yahoo.com ...
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1answer
86 views

Is IPV6 blocking my DHCP on Fedora?

I’m running Fedora 20 with KDE on a laptop I use for work. When I’m at home I use DHCP and when at work I have to statically assign an IP. When I came home the other day for some reason it doesn’t ...
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1answer
23 views

Choose different host part during IPv6 auto configuration

My Internet provider assigns dynamic IPv6 prefixes, which changes every few days. Is it possible to change the host part during auto configuration, e.g. using the prefix from the router ...
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1answer
33 views

Behavior of IPv6 Privacy Extensions

IPv6 privacy extensions are defined in RFC 4941. From that I understand that the temporary interface identifier is not only chosen anew when the temporary lifetimes expire, but also when the link ...
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2answers
36 views

Virtualbox running Ubuntu and ipv6

I'm just playing around with ipv6 and I was trying to use netcat over ipv6. I tried the following and it works. $ # terminal one $ nc -6 -l 7171 $ # terminal two $ nc -vvv -6 ::1 7171 ...
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1answer
184 views

Google Chrome freezes using IPv6

I've got a bit of a problem with Google Chrome. A few weeks ago I switched to another ISP that offered IPv6. Since then Chrome is randomly freezing when accessing certain websites (freezing as in "not ...
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10 views

Revoking a dhcpv6 address lease

Is it possible to revoke a dhcpv6 address lease before it expires? For instance, if the prefix changes, is it possible to distribute new IPv6 addresses?
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2answers
123 views

Debugging IPv6 routing issues

I have been given a native (no tunneling etc) IPv6 /64 block by my ISP. My pfSense router has successfully got an address, and from its WAN interface I can for instance ping ipv6.google.com and get a ...
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0answers
23 views

Issues configuring IPv6 on Red Hat 5.8

I'm new at linux and i'm trying to configure IPv6 on a Red Hat 5.8 due a specific application I'm working on. This Linux is installed in a VMWare 8 and the IPv4 is working fine! I can ping the host ...
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0answers
56 views

What might be causing specific IPv6 HTTPS servers to send an excessive number of RST packets?

Client browsers on my IPv6-enabled home network hang and time out when attempting to load https:// URLs from specific IPv6 sites, such as ones operated by CloudFlare. In those situations, the live log ...
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1answer
114 views

Reinstalled Windows 7 - Now cannot connect to any activation server or Microsoft Exchange

I reinstalled Windows 7 this morning, and now I am unable to connect to any activation servers for any Adobe software, and I cannot connect to Office 365 Microsoft Exchange server in Outlook 2013. ...
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1answer
56 views

IPV6 and MAC discovery

Is there a way to get the MAC and IPV6 Global link address for the network, just as ARP does with IPV4 in Ubuntu. I tried to retrieve IPV6(Link Local Address) using THC-IPV6 tool. But retrieving MAC ...
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1answer
38 views

ip6tables: how to handle periodically changing prefix?

My ISP provides me with native IPv6 (unfortunately DS-Lite for v4) and I'm using SLAAC for the clients in my local network behind a broadband router. As I don't trust the router (which is configured ...
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48 views

I can only connect to IPv6 websites

my problem is, that I can only connect to servers and their websites supporting IPv6 (such as google.com or facebook.com). On other sites, a ping request times out. Additional information: 1. My ...
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1answer
214 views

Understanding my router IPv6

I got my new Internet contract today. This is the first time I use this router and deal with IPv6. I want to host a local website on a home server. I went to the configuration page of the router and I ...
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2answers
81 views

My router has only IPv6 and I need to host websites

I have never dealt with IPv6. Today I got my internet installed from an internet company and they brought the router. When I accessed the router to see its public ip address, I found that there is ...