Questions tagged [ipv6]

Internet Protocol version 6 (IPv6) is the latest version of the Internet Protocol (IP), the communications protocol that provides an identification and location system for computers on networks and routes traffic across the Internet.

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using rlogin with ipv6 address

I am trying to connect to the remote host via rlogin rlogin -l root -p 513 fe80::cccc:1f%eth0 But I am getting the message: kex_exchange_identification: read: Connection reset by peer What should ...
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Create static ipv6 address without 'noprefixroute' using NetworkManager

I have created a static ipv6 address on my firewall (armbian) LAN ethernet. I used NetworkManager. The problem is the address shows as: inet6 2001:DB8:c101:b700::1/64 scope global noprefixroute The ...
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1answer
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Why does lsof indicate my IPv4 socket is IPv6?

I am looking at the output of lsof -i and I am getting confused! For example, the following connection between my java process and the database shows as IPv6: [me ~] % lsof -P -n -i :2315 -a -p xxxx ...
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Kernel-based IPv6 SLAAC not working?

My ISP's DHCPv6 is broken. As a work around I figured I'd try IPv6 SLAAC since I do see router advertisements coming in on my WAN interface. I believe I've configured accept_ra, accept_ra_pinfo, and ...
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dhcpcd dhcpv6 times out after Router Advertise, never sends a DHCPv6 Request

I use a linux host as an IPv4 router and looked into enabling IPv6 (it's the future, I'm told). I already use dhcpcd as a dhcpv4 client to get an address from my ISP, so I figured I'd use it for ...
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Run script on obtaining custom vendor option in Stateless DHCPv6 client

I am using Ubuntu and this question is regarding DHCPv6. After obtaining RA (router advertisement) with O-bit ("Other configuration" flag) set to 1, an information-request is sent by the client. ...
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IPv6 Doesn't Route Outside Of Libvirt Network

I have VM which has a single interface that itself only has IPv6 available from libvirt's dnsmasq: 2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default ...
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Turning off ipv6 in CentOS 7

I am attempting to reduce network traffic. Every time httpd on our CentOS 7 box makes a dns query, I can see that both an A and an AAAA request type hitting our internal dns server. Since we are not ...
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How to connect ipv6 address with ssh?

My local network is simple. sudo ifconfig enp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.31.52 netmask 255.255.255.0 broadcast 192.168.31.255 inet6 ...
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Correct routing of IPv6

I have a Raspberry Pi connected via eth0 to a router and via eth1 to my computer. I use systemd-networkd to masquerade IPv4 to my computer which works like a charm. Because of some reasons I now need ...
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Debian ignores static IPv6 configuration

Original post I'm trying to configure a static IPv6 address for my Debian container (running on LXD) but the system keeps ignoring my configuration. Currently my /etc/network/interfaces looks like ...
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DS-Lite: Extended NAT binding table

I‘m trying to set up a DS-Lite AFTR. Because of the overlapping addresses of the tunnel connections to the B4s, a normal NAT table does not work (already tried iptables -t nat -A POSTROUTING -j ...
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How to establish an ip tunnel to multiple addresses?

I want to establish a tunnel (ip4ip6) to multiple IPv6 addresses. I'm trying to do something like this: ip tunnel add sometunnelname mode ip4ip6 local 2001:db8:abab:fefe::1 remote 2001:db8:abab:fefe::/...
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Failing service during boot, which one + solution?

System: Linux Mint 19.3 "Tricia" - Cinnamon (64-bit), based on Ubuntu 18.04, kernel 5.3.0-24-generic Problem duration: literally for a year or so. Problem description: since I have too large a ...
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1answer
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Adding IP6 link local address to gretap interface

I've created a GRETAP interface which is working: $ ip link show t104016114 15: t104016114@NONE: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1242 qdisc fq_codel state UNKNOWN mode DEFAULT group ...
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Losing IPv6 connection after starting OpenVPN

I am running a Pi-Hole Server on a VPS instance. To protect it from being an open relay i configured OpenVPN on IPv4 and only routed the DNS traffic over the VPN. My home network ist connected to that ...
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1answer
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“deprecated” in ip addr sh?

When I run ip addr sh I see my secondary IPv6 addresses have deprecated next to them, whilst my primary IPv6 does not. Could someone help explain this ? inet6 2001:DB8::aaaa/64 scope global ...
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IPv6: Why ping to another IPv6 host doesn't work when loopback interface is DOWN

While it is said the only job of lo interface is to test its own connectivity, why doesn't pinging another IPv6 host work when the lo interface is made DOWN. Network configuration: host1(eth0) - ...
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Does ss5 proxy server support IPv6?

Doesn't seem to work. My server have IPv6 activated and working. curl -6 directly also works, but not with the proxy. I have check the log and the error is "no IPv6 support"
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How to disable ipv6 when bridge module is required?

In linux, if you need to bridge NICs, bridge module will be loaded automatically. But one of bridge's dependency is ipv6. Is there any way to overwirte ipv6 dependency since I only need ipv4? I ...
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1answer
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Wireless card keeps connecting then disconnecting

I have a Broadcom BCM43142 chip, it works normally as of Debian 9. But after upgrading to Debian 10, it displays this weird behavior of automatically disconnecting from WiFi, reconnecting successfully ...
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Why isn't my NAS advertising its IPv6 addresses?

Before my old router died, my NAS could accept incoming connections for any of its global (self-assigned) IPv6 addresses. After switching to my ISP's modem/router, incoming IPv6 connections no longer ...
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1answer
60 views

Why do I have to add a /128 ipv6 address explicitly to a device if I have a /64 already?

On a Fedora server, I have the following line in my /etc/sysconfig/network-scripts/ifcfg-eth0:0: IPV6ADDR=<REDACTED>:48ea::1/64 Now binding to that specific address works: $ nc -l <...
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IPv6 simple home LAN server confiiguration

How do we configure a IPv6 host for access through its global IPv6 address? If that's what we do.This is a server running services for a small home LAN that I want to access when I'm away. I have ...
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IPv6 Neighbour Table Overflow: Stop Router from caching multicast addresses

TL;DR: How do I prevent IPv6 neighbour solicitations from creating multicast entries in the neighbour cache? I recently installed the somewhat obscure Padavan RT-N56U firmware (Linux 3.4.110) on my ...
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Wireguard IPv6 connectivity not working

I have set up a Wireguard server on a VM running on top of Ubuntu and a couple of clients. I have also installed Pi-Hole on the same VM and I am using the public IP address for DNS resolving ...
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2answers
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Stable-private IPv6 address with systemd-networkd

I am trying to setup an IPv6 stable-privacy adress on a box with systemd-networkd. The box is an rpi runnning archlinux-arm but this is the same than for archlinux So following the wiki @archlinux....
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1answer
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Enable ipv6 on Debian 10 if there is no /proc/sys/net/ipv6 folder

If I run ifconfig I can see that there are no ipv6 addresses assigned to any of the interfaces. I get an error telling that the address family is not supported if I try to create AF_INET6 socket. I do ...
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NFS IPv6 - configure server,client,firewalls, update

I'm having trouble configuring NFS server and client for IPv6. There is no problem using IPv4 in this but with IPv6 no such luck. My current try is this: server:/etc/exports /export/hat 2001:.../...
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ipv6 in qmi cellular proto openwrt

i want get ipv6 in qmi cellular protocol in openwrt my gsm modem is EC-25 and i check this that gsm modem show my isp ipv6 but qmi proto not set this ip for wwan0 how i can config this proto for ...
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DHCP-PD on wan side with Stateful DHCPv6 assigned globally routable ips on lan side. Need to dynamically configure DHCPv6 on lan side

Context I'm currently neck deep in building an internet gateway out of an old fanless, headless Intel Atom/ITX computer I had laying around. These are my requirements: have an ipv4 and ipv6 ip ...
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How does one publish default router preferences using OpenBSD 6.5's rad daemon?

How does one publish default router preferences as defined in RFC 4191 using rad in OpenBSD 6.5? I've read the friendly manual and scanned the source with no success.
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How to share an IPv6 connection to the whole LAN?

My ISP still doesn't support IPv6, and I currently use OpenVpn or OpenConnect VPN to get IPv6 connection. Now that there is a Ubuntu server running VPN client UNDER an OpenWRT router. Is it possible ...
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nfs export to ipv6 client

My NFS exports are accessible via IPv4 to a number of hosts on my LAN. I want to make these exports available via IPv6 so that I can mount them to my laptop when I'm away. When I'm away I can access ...
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1answer
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Why does localhost resolve to ::1 but not 127.0.0.1

With getent hosts localhost, I only get ::1, although I expect 127.0.0.1. I have IPv6 disabled, so getting ::1 is even more surprising. To add to the confusion, when I ping localhost, pings are sent ...
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Testing external access via IPv6

I want to access some services running on one of my home LAN hosts. I have forwarded through my router but since my router does not support loopback I have to re-configure access when I am away and ...
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Enabling DHCP for IPv6 in netplan with networkd doesn't seem to do anything

I'm currently configuring the network interfaces for a Ubuntu 18.04 server, using netplan with the networkd backend. My hosting provider provides me with an IPv4 and an IPv6 for this server, however ...
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1answer
4k views

How can you run OpenVPN client inside a docker container?

I want to run a OpenVPN client inside a docker container. I tried as following in an ad-hoc test: docker run -it --rm --cap-add=NET_ADMIN --device /dev/net/tun -v $PWD:$PWD ubuntu bash in the ...
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How to avoid extra routes from Network Manager?

On my home wireless network, network-manager adds extra routes compared to wpa_supplicant, which causes IPv6 hosts on the local network to be unreachable. Route table is shown below, note that network-...
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1answer
245 views

git ssh to ipv6 address on non-standard port

I am trying to access a git respository at a IPv6 address that has a SSH server listening on port 1111(for example). Access is controlled by SSH key and I can open a SSH session on the gitserver ...
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RFC4821 Path MTU discovery for IPv6 on Linux

I have configured an IPv6-over-IPv4 tunnel via Hurricane Electric on my Linux machine. While I can ping ipv6.google.com: bash-4.4# ping ipv6.google.com PING ipv6.google.com(lhr48s09-in-x0e.1e100.net (...
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1answer
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How to configure my laptop wireless adapter for DHCPv6

The network topology is as simple as it gets: After some correspondence my ISP flipped some switch to enable the router to get what the router calls a "Default IPv6 Gateway." My Ethernet-connected ...
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Unable to wget for ipv6

I tried wget using the following command wget -6 https://[fe80::] But it displayed the following error Connecting to [fe80::]:80... failed: Invalid argument.
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Test IPv6 windows + VirtualBox (Ubuntu) [closed]

I have client(Linux)-server(Windows) application. I have Windows 7 as a main OS and Ubuntu 18.04 on a VirtualBox. I need to test that the client can connect to the server through IPv6. How do I setup ...
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how to assign an IPv6 static address [closed]

I have several IPv6 devices (custom built Linux) and my development machine (Fedora 30). They are all connected to a switch. I'm able to login to the devices through a serial port, i.e. I can talk to ...
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unable to ping ipv6 device with linklocal address

I have an IPv6 device with link local addressfe80::204:9fff:fe04:7fb5 (output of ifconfig is below). My machine has an address fe80::d939:2d31:6fe2:c203. I tried to ping both ways (from machine to ...
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Adding Options To IPv6 SLAAC RA-learned default routes that survive RA-updates

I use IPv6 SLAAC to distribute routing information in my network. The default route has a lifetime of 1800s and is getting regular updates through the router. However, if I modify the default route, ...
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1answer
2k views

How do you remove bad DNS server IPs from systemd-resolved?

So I was testing a router and it added some random IPv6 addresses to all the machines on my network, including my DNS server. Somehow those IPs were broadcasted around as valid DNS servers (not sure ...
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1answer
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How to connect to a IPv6 service using IPv4 connection on CentOS 7?

I'm trying to work out how to connect an inbound IPv4 connection to a port listening on a IPv6 port on a CentOS box. To demonstrate on a vanilla CentOS 7 server: Confirm bindV6only is disabled $...
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How to add static ipv6 route with systemd-networkd

I'm trying to achieve the equivalent of the ip command below via networkd without success. ip route add default via fe80::1 dev eth0 My networkd configuration looks like below and brings up the ...

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