Questions tagged [ipv6]

Questions about IPv6, the newest version of the Internet Protocol. This tag should be used when asking about personal/home network IPv6 addressing, or basic IPv6 knowledge. Questions related to company-grade IPv6 networks are off-topic and should be asked on Network engineering SE.

412 questions with no upvoted or accepted answers
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votes
1answer
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Allow traffic through a firewall to a dynamic IPv6 address

Suppose I have this configuration on IPv4 right now: My router (a Linux box) is connected to the Internet on eth0 and my LAN on eth1. I want to forward port 80 to 10.1.2.3. Here's how I'd currently ...
8
votes
1answer
575 views

Forcing *BSD to accept both IPv4 and IPv6 traffic on a single socket

I have tried a ton of stuff and keep coming up entirely empty handed. Allow me to frame the situation: I have a *BSD Jail setup in FreeNAS that runs a Plex Media Server (Plexpass). It has IPv6 ...
7
votes
1answer
2k views

How to prefer ipv6 over ipv4 only for specific websites?

I only have ipv6 connectivity via a HE tunnel on my router, so normally I want to prefer ipv4 over ipv6. For some websites however, I would like to prefer ipv6. Right now I have just set ...
6
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0answers
6k views

What is IPv6 connection sharing and why do I want it?

I can't easily find any good information on what IPv6 connection sharing is, nor how it affects my local network topology. I can only find a bunch of information on how to enable it and how turning it ...
6
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1answer
5k views

Does Windows Firewall block ICMPv6 by default?

After a long struggle trying to establish IPv6 connectivity with Windows box (and failing) I noticed that Windows Firewall blocks a lot of ICMPv6 packets. Closest predefined rule I could find does ...
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0answers
2k views

How can I disable IPv6 DNS in Windows 10?

My proxy server (though ping for 300ms+) have IPv6 addresses. I usually use it. So disable whole IPv6 is not a solution. Auto detected IPv6 DNS annoys me for wrong/lacked/polluted records. Windows ...
5
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0answers
3k views

How do I remote SSH into an IPv6 address behind a router firewall?

I have this fancy new ubuntu server I just built assembled, and I'm trying to set up ssh from anywhere so I can keep it headless. I've been able to set it up locally, and as long as I'm on the ...
5
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0answers
716 views

Forward IPsec tunnel from IPv4 endpoint to IPv6 endpoint

I have a new ISP and only have a Dual Stack - lite connection now. That means I can't access my router via IPv4 anymore, since the external IPv4 address is private. I have native IPv6 connectivity. ...
4
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0answers
2k views

Remote desktop to a machine on ipv6 from ipv4 network

Background I have a ipv6 connection at home my prefix is 2a02:xxxx:xxxx:xxxx::/64 I do have a ipv4 address but this seems just to be a shared IP and I have no control over it. My ISP is Virgin Media ...
4
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0answers
929 views

Login to Hamachi using IPv6 times out

My cable modem uses IPv6 and so does my LAN. I want to connect my laptop to the hamachi service. However, the laptop tries to connect via IPv4 and this attempt fails. The network configuration of my ...
4
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1answer
432 views

How can I make a program use the public instead of a temporay IPv6 address?

I currently am and want to keep using the privacy extension (Windows 10 default). > ipconfig Windows IP Configuration Ethernet adapter Ethernet: Connection-specific DNS Suffix . : home ...
3
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1answer
240 views

Linux not preferring ipv6 on dhcpv6 network

On my home network, I'm using a (Raspbian) Raspberry Pi as a wifi router with hostapd, isc-dhcp-server, radvd, pihole, and dnscrypt-proxy installed. I do not use dhcpcd, I use dhclient. As I only get ...
3
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0answers
700 views

IPv6 link-local multicast vs. IPv4 broadcast

I know that there is no broadcast in IPv6. However, there is the concept of link-local multicast using the ff02::1 IP address, reaching all hosts in the very same local network. So what is the ...
3
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2answers
3k views

How to set up OpenWrt traffic rule for port forwarding IPv6 server on my LAN?

I would like to allow inbound IPv6 traffic on ports 80/443 for a globally routable web server on my home network. What's the best way to do this with OpenWrt, which by default blocks incoming IPv6 ...
3
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1answer
480 views

Can I prioritize IPv6 traffic over IPv4 traffic on Linux?

Is there a way I can give traffic over IPv6 a higher priority than traffic over IPv4? Purpose is 2-fold: Promote IPv6, and be able to connect even when my server is swamped by IPv4 users.
3
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1answer
2k views

ignore ipv6 router advertisements for static addresses with bonded interfaces

I need to attribute static IPv6 addresses (not use autoconfigured addresses, and ignore router advertisements). This can be done as follows for a standard interface like eth0 iface eth0 inet6 static ...
3
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0answers
2k views

Is there a way to enable/disable IPv6 without restarting Chrome?

chrome://net-internals/dns#dns has a button which allows us to enable IPv6 for Host resolver: This is how it looks like after clicking Enable IPv6: How do I revert to the previous state without ...
3
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1answer
1k views

Can't ping another Teredo client behind the same NAT

I have 2 computers that are about as similiar as they can be Both run Fedora Linux 15 x64 Both are behind the same IPv4 only NAT (my house) Both run Miredo (Teredo Tunneling) and have unique ...
3
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0answers
2k views

IP Helper service uses 50-60% CPU every 1 minute for 3-4 seconds on Windows 7

I have checked everything - all the processes in the process explorer. IP Helper service is causing CPU usage of over 50 % every 1 minute for 3-4 seconds then comes back to normal. In the task manager,...
2
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0answers
53 views

No ping6 btween devices, 6lowpan network with raspberry pi

I am trying to make a 6lowpan network with raspberry pi device(s) and embedded systems. I enabled bluetooth_6lowpan (modprobe bluetooth_6lowpan and echo 1 > /sys/kernel/debug/bluetooth/...
2
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1answer
48 views

I can't access most sites using IPv6. Is it an issue with “Level 3” network?

Note: I'm not a network expert, and I don't have deep knowledge about IPv6. Recently, IPv6 connectivity seems not to be working here. (Tested through Firefox) The funny thing are, when doing a ...
2
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0answers
137 views

Is ip possible to disable ipv6 for a certain network namespace?

I'm looking closely at network namespaces and because of a network setup with multiple gateways where only some of them are ipv6 enabled, I need to disable ipv6 for a certain network namespace that ...
2
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0answers
660 views

IPv6 Config on Asuswrt-Merlin (374.43 LTS releases)

For my home LAN I use an ASUS RT-N66U running the Asuswrt-Merlin (374.43 LTS) fork which is a nice simple and stable firmware and also updated regularly. My ISP is BT in the UK. I have been using ...
2
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0answers
126 views

NFS Server IPv6 best practices?

I have a NFS server that only has exports for 10.0.0.0/16. I'm enabling IPv6 on all my network (homelab network), and want to switch all services to prefer ipv6 if possible. With that being said, ...
2
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0answers
525 views

Windows 10 with IPv6 ULA and NAT thinks it's not connected to the IPv6 Internet

My little LAN is connected to two ISPs and I internally run ULAs so I can make explicit client-to-ISP assignments by centrally NATing my clients onto the respective ISP prefix. All Windows ...
2
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2answers
1k views

OpenWRT IPv6 Firewall Redirect Port

Does anyone how to redirect an incoming port to another port for an IPv6 address in OpenWRT? There is no NAT involved just an ordinary global IPv6 address. What I am trying to do is change the port ...
2
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0answers
255 views

Why are OpenVPN clients getting IPv6 address non-randomly?

My OpenVPN IPv6 clients are getting assigned addresses sequentially from 1000. For example, client 1 gets: 2006:xxxx:xxxx:xxxx::1000 and client 2 gets 1001 and so on. Also, they keep getting the same ...
2
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0answers
274 views

Accessing VirtualBox guest web server via IPv6

Host: Mac with Chrome Guest: Ubuntu 16.04, bridged adapter Guest: karl@karl-VirtualBox:~$ ip -6 addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 state UNKNOWN qlen 1000 inet6 ::1/128 scope ...
2
votes
1answer
99 views

Solved: whatismyip.net shows ipv6 for my w10 box but ipv4 for my w7 box behind the same router

I am located in Germany but the ipv6 address is from California. I suppose there is some proxy active as I have played with kaspersky and hotspot shield recently. I have disabled both of them though ...
2
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0answers
967 views

SSH Slow to Connect on IPV6

Firstly I've looked at all the existing answers and none have fixed my problems (UseDNS etc.) The problem is when I try to connect to my VPS with SSH (Putty is the same) there is a long delay (~1+ ...
2
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0answers
113 views

Setup IPv6 on two routers with file sharing

My current network is as seen below (plenty of more wifi devices but you get the idea). +--------+ ...
2
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0answers
525 views

How to close netcat server after some data has arrived?

I am sending UDP data over the WLAN medium and using IPv6 Multicast. I am timing the sending using: time yes|cat /tmp/hello.txt | nc -6 -u -q 1 ff02::1%wlan1 30002 the client closes after a second ...
2
votes
1answer
1k views

SSL for IPv4 over IPv6 forwarded connection

regarding this question there is the following network setup. At home there is a cubieboard running an Apache server behind me router. Problem is that my ISP only gives me a IPv6 address and uses DS-...
2
votes
1answer
996 views

Teamviewer WOL does not work

I try to wake my PC from my mobile with the Teamviewer for Remote Control app. And it doesn't work. I set up the WOL regarding the Teamviewer WOL manual: The Network Adapter is configured to wake ...
2
votes
1answer
939 views

MacOS not able to ping LAN-servers over IPv6

Since June I got an IPv6 subnet from my ISP. I'm using an Asus AC-66U router which is configured to get a native IPv6 prefix. The prefix length is 56 and the router is configured for stateless ...
2
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0answers
790 views

My syslog is full of errors from NetworkManager about setting the MTU for wireless adapter

NetworkManager keeps trying to set the MTU for my wifi connection to 9216 and then complain about it: NetworkManager[9173]: <error> [1469713916.019478] [platform/nm-linux-platform.c:2489] ...
2
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0answers
945 views

How do I use mDNS for ssh -6?

Hello I have the following setup: Ubuntu 14.04 LTS Laptop A lot of Raspberry-Pi Model 2 with WLAN The complete setup is based on 802.11 WLAN AD-HOC mode. None of the Pis nor the Laptop uses any ...
2
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0answers
5k views

How to configure dnsmasq to send DNS server Info via DHCPv6

There is a known problem with a IPv6 Windows Client that it does not accept the DNS Server Info sent by Server via Router Advertisements, even though the IPv6 address assignment works. DNS Server ...
2
votes
1answer
864 views

How to setup an OpenVpn tunnel to IPV4 from a dualstack lite (ipv6 address only) cable modem

As of today, I am on a nice and fast new cable modem connection. Unfortunately, that connection is natted to an external shared IPV4 by my ISP. It is only possible to reach my modem via a unique IPV6 ...
2
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0answers
1k views

DD-WRT and native IPv6

There have been a couple of questions on this topic but as things have evolved somewhat since then, so I'm opening a new thread. My ISP has started offering native IPv6 and I'm trying to get DD-WRT ...
2
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0answers
4k views

How can I prevent Cisco Anyconnect, client-side, from setting any IPv6 routes?

On the client side, how can I prevent Cisco Anyconnect from setting IPv6 routes. I'm admin on the client-side, so this shouldn't be a limiting factor. Currently upon connection routes get set for ...
2
votes
1answer
529 views

Native IPv6 on Debian Router

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 ...
2
votes
1answer
2k 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 ...
2
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0answers
308 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 ...
2
votes
1answer
532 views

IPSet with IP6Tables ERROR

Can someone please solve my headache and tell me how to fix this? [root@www ~]# ip6tables -I INPUT -m set --match-set blacklist6 src -J DROP ip6tables v1.4.7: Couldn't load match `set':/lib64/...
2
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0answers
3k views

How do i make Chrome use an IPv6 address from my hosts file?

I have a Windows 7 machine that's running Ubuntu in a VM. The VM has an interface configured as an IPv6-only, host-only network. The network is statically set up, and all that seems to be working. ...
2
votes
0answers
411 views

DMZ Linux host in IPv6 network with changing prefix

I have the following scenario: My home network is connected to the internet via IPv6, the router advertises the network prefix in the network so devices are auto-configured. The network prefix ...
2
votes
0answers
959 views

How to make FTP Server in Mavericks listen on IPv6 interfaces?

Althought native IPv6 connectivity is not yet possible with my ISP, I can access IPv6 websites via 6to4 tunnel. The Server App in Mac OS X Mavericks comes with FTP features. However it seems to accept ...
2
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0answers
1k views

Window Server 2012 throttling incoming IPv6 network file sharing operations

Short version IPv4 download from server: fast IPv4 upload to server: fast IPv6 download from server: fast IPv6 upload to server: slow Full version I am copying files from a GBe desktop to a GBe ...
2
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1answer
541 views

Prefer IPv6 over IPv4 in Windows Server 2003

I am running Windows server 2003 and my Firefox browser keeps using IPv4 instead of IPv6. Well at least http://ipv6-test.com/ says that my browser uses IPv4. How can I force it to prefer IPv6 over ...

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