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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.

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IPv6 Token for Windows

I am try to figure out, how I can set a fixed Interface Identifier on Windows. On Linux we can set it as example with: NetworkManager $ nmcli connection modify MYWIFI ipv6.token "::1:1:1:1" From ...
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1answer
71 views

Permission denied when connecting via ssh (ipv6)

I use a key to authenticate. When I connect using ipv4 it's working. Using ipv6 I can not login (using password or not). Do I need a seperate rsa-key to manage ipv6 ssh's?
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1answer
52 views

IPv6 ping only possible when target machine pings back

I have a typical "a can ping b but b cannot ping a" problem. I use IPv6 for the ping. What is special in my case is that "b" can ping "a" immediately after "b" pings "a". After some trials, I realised ...
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1answer
62 views

putty - network is unreachable error

Yesterday I bought a cloud server from vultr.com (ipv6 version). I'm trying to connect to my server via PuTTy; however, when I entered the ip address of my server and hit enter, it gives the error "...
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1answer
46 views

Windows losing IPv6 address after ~10 minutes

When I initially connect to my home network my windows PC is assigned an IPv6 address - however after a few minutes it loses this address! I seem to have similar behaviour on multiple hosts using both ...
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1answer
35 views

When connecting 2 routers to my network I end up with 2 IPV6 addresses. How can I control / stop this?

I'm trying to use a spare router as a wireless access point on my network - I've given it a static address and disabled DHCP, however when I plug this into the network I end up with two ipv6 addresses!...
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1answer
25 views

How to resolve ipv6 ssh on Ubuntu 16.4 with possible interface ambiguity

I have a new Ubuntu 16.04 install. I want to ssh into a MacBook Pro via IPV6. I can ping the Mac from Ubuntu, but it requires me to specify -I. $ ping6 -c 1 -I enp0s25 fe80::14fc:cec5:c174:d88 PING ...
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2answers
395 views

Ubuntu IPv6 ping self gives unknown host

I'm stuck trying to get IPv6 working on a new Ubuntu 16.04 (Xenial Xerus) install. My scenario is very basic - trying to ping the local IPv6 address. $ ifconfig enp0s25 Link encap:Ethernet HWaddr ...
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1answer
57 views

How to prefer communication in the local subnet using IPv6 ULA instead of IPv6 GUA?

all my devices own IPv4, IPv6 LL, IPv6 ULA and IPv6 GUA adresses like this: 3: wlp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 88:b1:11:...
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35 views

Container port/service accessible from all host IP's with docker custom bridge linked to IPv4 alias on Synology NAS

Good day all. I Have a question regarding Docker on a Synology NAS (Linux). I have a Ubiquity Unifi Controller container running on this NAS. (jacobalberti/unifi) This image needs specific ports to ...
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29 views

ASUS AC1900 Router Speed difference between IPv4 & IPv6

When I connect directly to my modem my DL speed is 300Mbs and UL is 23Mbs. When I introduce a router (I have tried 2 ASUS TM AC1900 & MikroTik), my IPv4 speed stays consistent but, my IPv6 speed ...
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0answers
19 views

IPv6 subnetting prefix

Is the percentage notation different than the slash notation in IPv6 subnetting prefixes? When using the terminal function ipconfig on Windows I have noticed that there is a slightly different ...
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2answers
40 views

Change IPv6 temporary address interval? Generate new IPv6 address?

1) On Ubuntu / Debian systems, how do you change the temporary ipv6 address interval? The time duration it takes before the system generates and changes the ipv6 addresses? 2) How do you manually ...
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0answers
37 views

IPv6 does not work in Docker swarm?

I have an Ubuntu server 16.04 LTS running both IPv4 and IPv6 (dual-stack). This server is also running Docker. However, I have problems whenever I try to access the containers in the swarm, but only ...
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2answers
273 views

IPv6 home set-up | OpenWrt 18.06.1 - how to?

I am struggling with the IPv6 home set-up. I don't understand networking much to be honest. My ISP informed me last year he is IPv6 fully capable. I did not manage to set it up in my router since ...
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1answer
99 views

tcpdump read both ipv4 and ipv6 packets from pcap

I'm trying to gain some info from payload of tcp and udp. The filter (tcp.stream && tcp.flags.push == 1) || udp.stream in Wireshark gives me both ipv4 and ipv6 packets. But I can't figure ...
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1answer
658 views

Is the Windows Firewall mode “Private” obsolete with IPv6 for home users?

Home users are generally expected to set the Windows Firewall to the Private profile when they are connected to their home network. The most common setup is being connected to the ISP provided router. ...
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1answer
77 views

Cannot connect to host even though it is reachable

There are 4 machines in my network, connected via a consumer router with default config (also acting as DCHP server). All machines can ping all other machines with both IPv4 and IPv6, except one (let'...
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1answer
55 views

IPV6: Ubiquiti Router, Ubuntu Client

I have a Ubiquiti router on which ipv6 appears to be working fine. The output of radvdump, along with various other relevant data, is below. My trouble is with ipv6 on an ubuntu 16.04 machine behind ...
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0answers
42 views

Accessing IPv6 Only Network from IPv4 Network?

My ISP has provided me IPv6 only internet connection. If I connect from my IPv6 PC to IPv4 Internet I have no issues, because the ISP does all the IPv6 to IPv4 conversion. However, at home, on this ...
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1answer
111 views

IPv6 prefix delegation

I'm a complete noob at IPv6, but have some practical experience of IPv4 (just because I had to deal with it). My home router is behind CGNAT so they don't offer public IPv4 addresses, but I'd asked ...
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1answer
77 views

Can I use the home computer as the website server for offering the website?

My thinking is, the IPv6 resources are great many. can I use my home PC as a server, then config the IPv6 address on it. and bind the domain to the IPv6. then I can provide my website to the public. ...
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0answers
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Why might pfsense be removing the link-local ipv6 address for my wan interface?

I am a Comcast customer, using IPv6 through a pfSense hardware appliance (PCEngines APU, running version 2.4.3-RELEASE.) I have setup my IPv6 on pfSense to ask for prefix delegations, which ...
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1answer
77 views

OpenVPN clients have no connectivity over IPv6

I'm trying to add IPv6 tunnel support to a OpenVPN server (i.e. clients can access the IPv6 internet through VPN). The router that runs OpenVPN (Netgear WNDR4500v1 running Tomato v1.28-140) has IPv6 ...
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1answer
24 views

Can NAT64 be accessable on the internet with an ipv6 address?

I try to grasp how NAT64 is working. NAT64 is only used for an ipv6 host which initiates the communication with an ipv4 host. I read that a client access the NAT64 with a prefix address 64:ff9b::/96, ...
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0answers
118 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 ...
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0answers
50 views

Windows Server Essentials 2012 resolving DNS to IPV6

I am having an issue when I ping the server by name it resolves into an IPV6 address. I have disabled IPv6 resolution in the DNS settings on the server, then reset the DNS service on the server and ...
2
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1answer
43 views

How to know primary and secondary DNS servers for IPv6?

In my router's WAN page, it says my Primary and Secondary DNS servers are 84.xx.xx.xx which belong to my ISP's DNS servers. However, my router is connected to IPv6 and lists my DNSv6 server as fe80::1 ...
2
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1answer
62 views

Multiple VLANs per NIC Failing on IPv6

I run a dual-stack (IPv4 and IPv6) home network, with a few VLANs to segregate IoT devices (VLAN 20) from normal users (VLAN 10) from network hardware (untagged VLAN). I'm currently hosting local DNS (...
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2answers
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What is hard coding in reference to ipv4 and ipv6?

I am trying to wrap my head around IPV6 networks. I have a static IPV4 from my isp and when I am building apps I use what I am assuming is a "hard coded" address. Like the below: //The * are replaced ...
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2answers
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What mechanism does Windows use to register its address in DNS?

In this Microsoft white paper IPv6 for the Windows Administrator: How Name Resolution Works in a Dual IPv4/IPv6 Scenario it's shown that Windows will attempt to register it's addresses with a DNS ...
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0answers
47 views

HurricanElectric tunnel begin to work only after a traceroute is done

I give you a little description of the network Structure and what I would like to be done and why! Unfortunately my ISP (one of the top in Italy) provide the IPv6 but only for navigate out, if you try ...
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0answers
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HomenetGroup completely gone [duplicate]

I'm running Windows 10 Professional, and my homenet group has never been there, and I can't locate any component of it. "services" doesn't show any service with the name of "Homenet..." that I could ...
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1answer
59 views

Access external Network from a computer in the network

My network architecture is like this: Now I want to be able ping PC1 and PC2 from Debian computer according to the architecture above. Which configuration in the routing table, Iptables or other ...
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0answers
19 views

Forward data from host to a simulated network node in guest

I want to forward some UDP or TCP packet from a program on my host OS to another program that is running on the guest OS. HOST OS: Debian 9 GUEST OS: Ubuntu 14.04 on Vmware player In fact there is a ...
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0answers
56 views

IPv6 firewall configuration

For the life of me I can't figure out how to configure a firewall to correctly use IPv6. First, let me explain my setup. I have created a small test environment in order to play around with IPv6 and ...
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0answers
115 views

Trouble with IPv6 under KVM host with bridge (Centos 7)

Trouble with IPv6 under KVM host with bridge on Centos 7 I have ip6tables that are cleanly flushed with: #> ip6tables -F ND should be allowed Then, if I do: #> ip -6 neigh 2a0d:2407:14::1 ...
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2answers
230 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 ...
0
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1answer
50 views

How do i setup a vpn server on a vps with only a ipv6 address?

I have a VPS but it only has a dedicated IPv6 address, i want to setup a VPN on it for me to connect to. How can this be achieved ?
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1answer
62 views

Router for RA, Linux for DHCPv6

I have a Mikrotik router. It has a DHCPv6 server, but it only gives out PD with it, it doesn't give out stateful addresses. I'd like to configure a Raspberry Pi (Debian) box for just the missing piece....
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1answer
69 views

netstat -r output, internet vs internet6, different gateway formats

What's the difference between internet and internet6 routes? I'm assuming internet6 stands for IPv6? netstat -r Internet: Destination Gateway Flags Refs Use Netif ...
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1answer
225 views

Why can't I ssh to a local (single-label) hostname: “ssh: connect to host myserver port 22: Invalid argument”?

(I figured out this is related to nscd; please see the bottom of the question) I'm trying to connect to a headless server via my laptop; they share a wired link via a Linksys wireless router and TP-...
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2answers
156 views

How can I trace an IP address (ipv4 or ipv6) back to my home network?

I am trying to see if my Netflix account has been hacked. I can see the IP addresses that are streaming from the account. However, I'm not sure how to trace the IP address to see the source. I'm ...
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2answers
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Force Windows to forget DNS server

My home network does not support IPv6. If I connect to one that does, and then go home, Windows keeps trying that DNS6 server until it times out. I've tried ipconfig /release6 but it doesn't work. ...
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1answer
103 views

Windows route selection and “route print -6” vs “netsh interface ipv6 show route”

So I'm using Windows 10 and I need to redirect some IPv6 multicast traffic to a specific interface (a USB-Ethernet adapter to be more specific). By default all multicast traffic is going to my WiFi ...
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0answers
191 views

Security cameras on IPV6

This is really a two part question. First the problem: HughesNet provides ONLY IPv6 access. They do NAT your local network and even provide an IPv4 address. But the IPv4 address is for looks only - ...
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1answer
931 views

How to SSH to IPv6 only VPS if my ISP only supports IPv4?

I have a server on Vultr ($2.50 plan) that only supports IPv6. But, my ISP right now only supports IPv4 and I can't SSH into that box to do work. How do I SSH into this server? What are the tools/...
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1answer
76 views

Is it possible to create an IPv6 subnet when my router have /64 prefix?

My ISP gives me a Zhone Router with an IPv6 address using /64 prefix. The wireless of the Zhone router sucks badly, so I bought a new router with IPv6 capabilities to amplify the range of wireless in ...
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0answers
114 views

Linux machine cannot ping6 or ping Windows machine

I am trying to communicate via IPv6 between a Windows 10 machine and a Redhat 7.5 Linux machine. I am testing my connection by trying to ping both machines from each other's terminal. I can ping both ...
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4answers
467 views

Can ping by hostname, can RDP by IP, but cannot RDP by hostname?

I'm trying to Remote Desktop to another Windows PC. Both computers are in the same WORKGROUP. I can ping the remote computer by its hostname, which responds with its IPv4 address. I could get that ...