Questions tagged [ipv6]
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, etc) remain unchanged.
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Block an IPv6 Address where only whitelisting is available
Came across a use case where I need to block an IPv6 address from accessing a site. It is fairly simple to block an IPv4 address by skipping the specific address from the whitelist range. Does any one ...
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Tunneling a IPv6 prefix through WireGuard
I'm learning how IPv6 works, and I'm trying to tunnel a public /80 IPv6 prefix from an OVH dedicated server to my house.
Here is my WireGuard configuration to hopefully better visualize what I'm ...
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IPv6 - Are the last 16 bits of the network ID always reserved for subnetting?
I was reading about IPv6 address structure and it has two portions one for the network (Network portion/Network ID) and another for host (Interface ID/Node Part) something like IPv4 has regardless of ...
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Specifying an IPv6 MX record via djbdns or djbdns-fefe?
I'm trying to set up IPv6 MX records in my djbdns environment. I also am experimenting with djbdns-fefe for this same purpose.
According to the djbnds-fefe documentation, "... tinydns-edit won't ...
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IPV6: Linux-Clients does not register Hostnames via DDNS
I have a problem to get Hostnames registered in DNS (Windows AD DNS-Server) when they request a IPV6 (NA). While IPV4 gets fine i can see in syslog an "added reverse and added forward mapping&...
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Connecting two Comcast networks together in the same building
Just looking for some heads up on this idea I have... I have two office locations for the same company in the same building. Each has a separate Comcast Business account / service.
I want to connect ...
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Windows Server 2016 binds to ipv4, but not to ipv6
I'm running Windows Server 2016 on an Intel S1200SPLR board. I try to run it with IPV6, but so far, it does not bind to any adapter, only ipv4 works. I only got a virtual DC to keep its DNS server ...
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Assign the whole ipv6 /64 subnet to an ubuntu vps [closed]
Well I know this is not a normal set up, I am just investigating possibilities.
I have hired a VPS from a provider who assigns me an ipv6 address in addition to ipv4. With a fresh Ubuntu installation ...
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Real IPV6 IP address in haproxy
We have a haproxy configuration with IPv6 frontend and backend. Its configured in TCP mode. When traffic is coming from an IPv6 ip address, in haproxy logs, its showing correct IPv6 IP address but in ...
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Portable router doesn't forward broadcast MDNS IPv6 messages
I have a device (a motec ECU) that is connected throught a wired eth, which uses IPV6 with MDNS broadcast messages (ff02::fb) to get discoved in the network.
If I connect a laptop directly to the ecu ...
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Why AnyIP feature does'nt seem to be working on my ubuntu machine?
I have an ubuntu VPS with a /64 ipv6 subnet assigned to it from the provider. When I connect to the fresh server the networking daemon configuration is:
/etc/network/interfaces:
# Generated by SolusVM
...
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Why do I only have a link-local ipv6 address?
I thought ipv6 solves the address problems. I was under the (obviously false?) assumption that I'd get an ipv6 address assigned to my machine at home and I would be able to use if (my ISP supports ...
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How do I configure netplan in Ubuntu 22.04 with dynamic IPv4 and static IPv6?
With Ubuntu 22.04, the gateway option is deprecated and nearly every example I find for configuring netplan with static IPv6 uses gateway.
My ISP's default /etc/netplan/01-netcfg.yaml only includes ...
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Forward all IPv6 traffic from a specific port to an other server
This sounds like a frequently answered question, but probably I used the wrong search terms.
I have two independent Linux servers A and B. I moved an application (rsync), which uses TCP Port 4444 for ...
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Why does local IPv6 work for net-snmp, but glocal one doesn't?
My Linux-based NAS contains Net-Snmp v5.9.3. I found that both IPv4 and IPv6 work fine for the whole NAS functions except SNMP functions. Basically, Net-Snmp works fine except the following issue:
...
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Redirect nginx port 80 to http2 443 fails [duplicate]
Searched tons of links on the web, I don't get why this conf doesn't redirect properly from http://example.com to https://example.com
My nginx conf:
# HTTPS
server {
listen 443 ssl http2;
...
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Accessing docker-compose containers via ipv6 from the outside of the docker host
I have the following (simplified) docker(-compose) setup and would like access the nginx container from the laptop. A ping from the laptop to the docker-compose gateway (fd..2222.0.0.1/80) works fine ...
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Forwarding all trafic with ipv6
I have two ubuntu server, one server from Iran and other from England
On the England server run V2ray vpn and i should have some tunnel from iran server to foreign country for best quality of speed ...
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Two ipv6 tunnels from different providers on the same host
My question is related to this question but with little difference:
I have an Ubuntu vps with a singe IPv4 on the main interface. I would like to have two separate IPv6 tunnels on this machine that ...
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DNS fails for IPv6 (macos)
I am trying to assign IPv6 addresses to loopback lo0 and access them through curl / browser with custom domain.
I've created ULA on lo0:
ifconfig lo0 inet6 fd56:dd46:5a5d:f2b5:3a51:916d:40ee:1b4a/128
...
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How many public useable IPv6 ips in a /64 range?
so I know that a /64 IPv6 range has 18,446,744,073,709,551,616 addresses, but I was told a majority of these IPs can only be use for local ips on LAN.
How many useable public ipv6 ip addresses are ...
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Static IPv6 LAN address while using SLAAC for global unicast
I have some IPv6 nodes in two IPv6 networks. There is a single IPv6 router, link-local to all nodes.
The router sends out router advertisements(RA) containing two prefixes for the two networks. The ...
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Why does ip6tables lose packets after PREROUTING to a different interface?
I'm using ip6tables to nat packages to an IP on a different interface (localhost), but all packets sent there are lost.
I have the same iptables rules for IPv4 where everything is working fine.
Setup
...
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No internet from OpenVPN (IPV6)
I've searched over this and this but still, I don't achieve to access Internet from VPN clients.
My VPN is giving a local IPV4 (10.8.x.x) IP that allows to access local infrastructure. It allows give ...
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Adding IPv6 address to Windows Failover Cluster yields empty SMB share
I have a Windows Failover Cluster set up with a file Server. There are two nodes and two networks.
Network 1 used for LAN SMB access and Network 2 used for private SMB storage for a bunch of Hyper-V ...
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Multiple IPv6 tokens on one interface
For a while, Linux has had support for IP tokens, meaning, you could do the following ...
ip token set ::10 dev eth0
and no matter what IPv6 prefixes the machine receives, it will always use ::10 for ...
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How can I bind whole IPv6 /64 block to a CentOS 7 server?
I know there are multiple questions about this but none of them fixed my problem. Please don't close my question.
I had created a bash script for itself adding it one by one with ifconfig. I was using ...
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mx record with IPv6 AAAA host
I need to setup a mail server or mx record with a IPv6 address
I have written a AAAA record which is working fine (pings, ports) here
I have setup hmailserver and checked all ports(587, 143) with ...
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Keep single IPv6 global unicast address on interface when prefix change
Looking for an option to update address (configured via SLAAC) on interface when new RA was received (maybe with some timeout)
I've tried to set net.ipv6.conf.interface.max_addresses, but on network ...
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Libvirt IPv6 routing to nated network
I'm having trouble getting IPv6 to work for my KVM/qemu guests.
I have two bridges setup, one routed (external, non libvirt) bridge for public dedicated ipv4 + ipv6 which works for both protocols.
...
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Accessing server behind wireguard not possible
I am running a VM at hetzner (named gateway in the diagram below) that is used as a wireguard server. I hand out public IPv6 addresses via wireguard to clients. It is possible to ping all systems from ...
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Assign a public IPv6 to a Docker container
I have an IPv6 address, in this case 2603:c021:4004:7400:4bc5:c726:7f5a:1c31 in the subnet 2603:c021:4004:7400::/56.
I would like to assign that IP address to a Docker container, so that upon making a ...
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Oracle Linux 8 - IPv6 Address disappear after kubespray installation (with NetworkManager)
I have a strange problem after installing a kubernetes cluster with kubespray (2.19.1) on oracle linux 8 (latest packages and vagrant image).
I use this vagrant file (got a bit ugly from time to time ...
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IPv6 port scanners hang after scanning a closed port
I am testing nftables firewall rules using two virtual machines, one with the active firewall and one that tries to connect to it.
For example with netcat and no firewall:
nc -6 fe80::9d08:b3e2:47fa:...
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Quagga OSPFv3 does not update IPv6 routes
NOTE: I've posted this on SuperUser but reposting here because I think it may be more suitable.
I'm trying to configure Quagga to use OSPFv3 to create proper IPv6 routes between two OpenWrt routers ...
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How to track down IPv6 DNS server configuration with Wireshark?
What Wireshark filter should I use to track down IPv6 DNS server advertisements on the network? I don't see any DHCPv6 traffic on my network, so I assume that the config of clients is happening ...
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How to setup RRAS as IPv6 Router and enable Router Advertisement
I have a Windows Server running on the local network acting as the router and VPN server. It has an IPv4 address with NAT enabled to provide internet access to devices on the network.
It also has a ...
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No IPv6 connectivity on the router behind the NAT
I have the following scenario. My ISP does not provide IPv6. As common practice, I've created a SIT tunnel with Hurricane.
My network is the following.
WAN (eth0)
------------ router A
...
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What are the downsides of using IPv6 Multicast for majority of all communication including one-to-one?
Given IPv6 Multicast allows for a sub-pub communication model, it seems like a no-brainer for the vast majority of communication, but its very rarely used beyond video streaming, and I'd like to know ...
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Allowing inbound IPv6 traffic to a host and port when the IPv6 prefix is dynamic?
With IPv4, you used to be able to give a host a static local IP address on the LAN, and use a firewall rule on the firewall/router to forward a port on the (possibly dynamic) Internet-facing IP used ...
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How to configure IA_PD prefix length with dhclient?
My home internet connection is going through a router provided by my ISP. It gets a ::/56 ipv6 prefix assigned dynamically by my ISP every night.
Behind that router I have a debian bullseye box for ...
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Why do i see ipv6 addresses on haproxy logs?
We have received complaints that some users cannot access the site during the day. Somehow they see maintanence page. When we examined the haproxy logs, we saw that all 503 error's requests' source ...
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DHCPv6 address xxxx/128 timeout preferred 140 valid 450
A couple of days ago, I activated the IPv6 for an EC2 instance. But, yesterday the instance was down twice.
When checking the syslog file, I found these repeated message:
ens5: DHCPv6 address xxxx/128 ...
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ipv6 address gets lost
I am running debian buster.
The machine has one network card and IPv4 is set static, whereas IPv6 is provided by DHCP.
To be honest, I am not sure in what file this is configured, as I configure it ...
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Proxy works on browser, but in python requests and wget get stuck
I have an ipv6 proxy that I generated by a vps, the problem that the proxy only works in the browser, the site supports ipv6, and I have already used this type of proxy by subscription of a provider ...
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IPV6 addresses not working on debian 11 - oracle cloud
I have an instance in oracle cloud with debian 11
The network configuration for IPV6 is:
iface enp0s3 inet6 static
address xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx
netmask 128
gateway fe80::1
dns-...
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How to setup tunnel/vxlan using "ip encap" for ipv6 on Linux?
Using light-weight tunnels allows the same (tunnel)device to be used for many destinations (among other things). For vxlan/ipv4 it works;
ip link add vxlan4 type vxlan dstport 4789 dev eth1 ttl 4 ...
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tunneling through IPV6 network to access IPV4 VPN server?
Scenario:
I have my computer [C] at home which has public ipv6 address but only private ipv4 address.
My mobile phone [P] has ipv6 address and can visit ipv6 sites.
Now I'm running an ipv4 only VPN ...
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how to do remote access in virtualbox (configure as bridge) with ipv6
I installed Ubuntu Server 22.04 in a VirtualBox set up as Bridge.
ipv4: 192.168.55.226
ipv6: 2804:389:a09c:d31a:a00:27ff:feca:3cad
How do I remote access my virtualBox by ipv6?
2804:389:a09c:d31a:...
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No access to nginx container in Docker via IPv6
I am struggling to have my Debian VM (5.10.0-15-amd64) accept incoming requests for a plain nginx webserver hosted on Docker. When binding the IPv6 address directly within the docker-compose.yaml file ...
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