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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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Why do I get No buffer space available when trying to use a gre tunnel?

I am trying to tunnel from a vps to another vps via ipv6 and this is my /etc/rc.local sudo ip -6 tunnel add gre1 mode ip6gre local *LOCALIPV6* remote *REMOTEIPV6* ttl 255 sudo ip addr add 10.0.0.2/30 ...
Hypothesis's user avatar
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Is there a way to access a port by using any address within a /48 ipv6 subnet that bound to an interface instead of using the exact address? [duplicate]

I have a VPS that has a /48 ipv6 routed subnet and running a service listen on ::. However, if I connect to this service using any ipv6 address within that /48 subnet will not work. Only the exact /48 ...
Smith's user avatar
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1 vote
1 answer
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Can I see from an outside perspective if a IPv4 and IPv6 address are mapped to the same server?

I am using a shared webhosting, for which I have an IPv4 and IPv6 address pointing to the server. I am wondering, if any user can see from the outside that both addresses point to the same server? Are ...
flip's user avatar
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1 answer
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Weird behaviour of IPv6 on our servers

I need help solving IPv6 issues on our servers. We currently have two servers—the original one will be turned off in the coming days, and we will switch to the new one. However, we've encountered a ...
Martin Mystik Jonáš's user avatar
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1 answer
89 views

ERR_SSL_PROTOCOL_ERROR when trying to tunnel IPv4 https traffic to a caddy server runing on an IPv6-only machine via socat

I have a home server that is only provided a public IPv6 adress. It serves a searxng (dockerized) behind a caddy reverse proxy (also dockerized). Access from the outside if the accessing device has ...
TorbenKorx's user avatar
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0 answers
44 views

Route53 IPv6 Outbound Resolver not forwarding

I can't seem to get Route53 to correctly forward DNS requests to nat64.net when using IPv6. The host in this case is Ubuntu 22 (though I think this is about AWS). Here's the background: I've created ...
MattW's user avatar
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0 votes
1 answer
28 views

"Property CidrBlock or Ipv4IpamPoolId cannot be empty" when trying to create an IPv6-only VPC Subnet

When trying to create an IPv6-only VPC Subnet, using AWS CloudFormation, stack creation fails with the following message: CREATE_FAILED Resource handler returned message: "Invalid request ...
djvg's user avatar
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0 votes
2 answers
88 views

How do clients select the DNS record from multiple DNS responses?

I have a Virtual Private Server with an IPV4 address and a range of IPV6 addresses, with the option of adding one hundred more IPV6 addresses. Configuration: OS: Debian 11 IPV4: One public Internet ...
malloc's user avatar
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0 answers
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Change Hyper-V IPv6Connectivity

I am trying to test IPv6 on a Hyper-V VM instance in Windows 10. IPv6 is enabled on my network, and working on my host machine (e.g, ping -6 ipv6.google.com is fine). However, in my VM, ping -6 does ...
shea's user avatar
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Dedicated Server + Proxmox + OPNSense + IPv6 Support for VMs in LAN

I am struggling setting up a working IPv6 network for VMs connected at OPNsense LAN interface. The provider (Hetzner) has given me a /64 IPv6 network: 2a01:4f8::::/64 Somehow I am able to create a ...
EAK TEAM's user avatar
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1 answer
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Outbound IPv6 connection replies not routed back to firewall in VPC

In a newly-built AWS VPC (deployed with Terraform to minimise typos), I have one "DMZ" subnet and one internal. A firewall appliance bridges the two, with an interface in each. Both ...
Ian Gibbs's user avatar
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1 answer
161 views

How to configure Ipv6 subnets for kubeadm setup of Kubernetes on a vlan?

I'm not understanding how to setup global ipv6 addressing for the pod network in a new dual stack kubernetes cluster. My isp gives me an ipv6 subnet of: 2001:1234:1234::/48 for example I have 3 vlans ...
Dreamystify's user avatar
1 vote
1 answer
51 views

network unreachable for gcloud compute engine instance

I've just configured my first google cloud server with an ipv6 address. When I try to run wget to the address it fails: wget -6 https://[2600:1900:4180:bfa7:0:0:0:0] --2024-03-04 18:20:39-- https://[...
Brett Sutton's user avatar
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0 answers
247 views

I can't open X-UI panel address installed on my oracle ubuntu server

I have installed x-ui panel and it shows it's up and running on my server, but when I try to access my server_ip:specified_port_for_x-ui it says connection time out or the site can't be reached. I ...
user3486308's user avatar
0 votes
1 answer
337 views

Cannot ssh into my vps ipv6 ip : Network is unreachable

The dashboard of my hosting company regxa provides me with a root password and ipv6 address to my CentOS server, no ipv4 I have tried using both putty and ssh cmd in my linux machine to connect to the ...
Rachel1983's user avatar
1 vote
0 answers
275 views

How do you configure Podman to use IPv6 on Debian

I am running rootless podman (podman version 4.3.1). I cannot get IPv6 working. Setup In /etc/containers/containers.conf I have set: network_cmd_options = [ "port_handler=slirp4netns", ...
Tintin's user avatar
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2 votes
1 answer
154 views

Nginx webserver not available with global IPv6 Address

Recently I changed my ISP, which doesn't give out any public IPv4 addresses (CGNAT) without a monthly charge, which is the reason that I am changing the configuration of my webserver (Ubuntu 22.04 &...
ITpro_LX's user avatar
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0 answers
169 views

Double IPv6 Static Addresses, is it possible?

I have two ISP, and I want to have two static IPv6 [::200]. It happens to work only one of them, if ISP 1 has the static one IPS 2 doesn't have static and uses 4 radom block ==> [:abcd:1111:3333:...
Bruno Souto's user avatar
3 votes
1 answer
962 views

How to upgrade to IPv6 for AWS EC2?

Starting yesterday, AWS is charging for IP addresses (IPv4). I would like to upgrade my EC2 instances to IPv6, but I must be missing the docs on how to do that? I can't seem to get an EC2 instance ...
Paul Draper's user avatar
0 votes
1 answer
194 views

Dhcpcd not assigning IPV6 address to LAN Interface

I am trying to use Raspberry Pi Zero 2 W as an IPV6 router having a debian based os. I have a usb wifi adapter (Interface Wlan1 ) facing wan . The inbuilt wifi (Wlan0) is facing LAN with hostapd ...
Ajay Gupta's user avatar
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1 answer
54 views

Is SLAAC generation affected by non 64 bit size network prefix?

I have enabled all the parameters needed for the generation of SLAAC, and I am obtaining router advertisement, but the network prefix in the router advertisement is /52 and not /64. The system is not ...
imawful's user avatar
-2 votes
2 answers
172 views

I have a whole ipv6 range /32 for my application. I want to use all of it [closed]

The Problem I know how to add block to interface. But I really don't know how to use specific address dynamically. What I want For example: I have a block fe80::/32 for my application. I will let my ...
hang QAQ's user avatar
0 votes
2 answers
844 views

How to force a server to return my IP address in IPv4 and not IPv6?

Scenario I have a tiny PHP script on a server that echoes the IP address of any client reaching it so the address can be added to the cpanel MySQL remote hosts table via the API. I call this script ...
user2834566's user avatar
0 votes
0 answers
120 views

Setting a prefix length hint (and similar DHCPv6) options with Dhcpcd

So I'm trying to get an ipv6 address from my ISP (Verizon in this case). With OPNSense I needed to set the wan interface to act as a dhcpv6 client and use a prefix size hint of 56 and ask only for a ...
Lindenk's user avatar
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0 votes
1 answer
117 views

Oracle Cloud how to assign IPv6 prefix >64 to instance and delegate

I am able to assign a /64 prefix to an instance in Oracle cloud but I want to have it act as a router; Delegating and routing a larger subnet to wireguard peers. This is using Oracle owned IPv6 ...
TheChubbyPanda's user avatar
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0 answers
41 views

Zyxel GS1920 IPv6 switch does not provide hostname to DHCP server

I have setup IPv6 in my network. All Zyxel switches do not provide an hostname to the dhcp-server for IPv6. For IPv4 they do! Is there any setup, e.g. via dhcp-options, to make the switch transmit the ...
Kallewirsch's user avatar
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0 answers
135 views

Cannot SSH to link-local IPv6 address on Packet Tracer

due to the fact that I don't have physical equipment at the moment I don't know if what I am about to say is purely an issue with Packet Tracer. I configured a Catalyst 2960 switch to allow for remote ...
Oreoezi's user avatar
1 vote
1 answer
770 views

Netplan- How to configure a static IPv6-address and SLACC

I’m facing a situation where I need to configure an interface with both a private static IPv6 address and SLAAC (Stateless Address Autoconfiguration) addresses. The reason behind this requirement is ...
Lc___'s user avatar
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0 answers
162 views

Ubuntu 22 server device gets public ipv6 assigned but not able to access it

Since I have Internet connection from an ISP that does not give public ipv4 and keeps the connection in cg-NAT but too my surprise I found out that it is assigning public ipv6 to all my devices. After ...
utkvishwas's user avatar
0 votes
0 answers
132 views

IPv6 ICMP rules for AWS Security Group

I'm in the process of configuring IPv6 ICMP rules in my AWS Security Group, specifically for an EC2 instance. I need to allow ICMP traffic for the PTMUD protocol and other related protocols. In the ...
xhci's user avatar
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2 votes
0 answers
180 views

ip6tables does not filter fragmented packets

My final goal is to block all TCP IPv6 fragments with a specified destination IPv6 address (lets say it is one of google.com addresses 2a00:1450:4010:c0e::79). This traffic is forwarded by host from ...
Kamil Zaripov's user avatar
1 vote
0 answers
599 views

Overwriting provider DNS via cloud-init

I want to overrides the DNS given by my cloud provider with my own custom DNS entries. This is a Ubuntu instance so this is configured in netplan. Once my VM boots I can see the following at /etc/...
Eric Anderson's user avatar
0 votes
1 answer
128 views

IPv6 route based VPN client with Strongswan, packets arrive but not received by application

I'm trying to set up a linux client PC with a route based VPN tunnel using strongswan and an XFRM interface, with IPv6 (end to end). strongswan 5.8.2, linux kernel 5.15.0 [An aside - I've tried an ...
feca67's user avatar
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2 votes
1 answer
84 views

What is the meaning/cause of this extra entry in the output of `ip address` when another device connects to the network?

I was recently trying to set up an EspressIf Border Router for my network. After flashing the device and letting it boot, a single-machine Kubernetes host on my network restarted all of its pods (!). ...
Danny Tuppeny's user avatar
-2 votes
1 answer
144 views

Windows application listens on IPv4 but not IPv6 UDP

I have setup a Windows Server 2022 AWS EC2 instance. I installed and am testing an application that only runs on Windows. When setting up the EC2 instance I enabled both IPv4 and IPv6. AWS requires ...
Aaron's user avatar
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-1 votes
1 answer
157 views

IPv6 - Docker Userland Proxy and identifying client source

I am very frustrated trying to get my Docker setup to work with IPv6. My configuration is the following: Docker Compose Service 1: nginx with network access to the wordpress:php-fpm container in ...
zhengliw's user avatar
0 votes
1 answer
161 views

oauth2-proxy under Google Cloud Run unable to login with provider due querying DNS on IPV6

I'm implementing oauth-proxy (Bitnami container) for a backend service at my company under Google Cloud Run, with different settings and various providers (Azure/Microsoft Entra, and Google). When ...
Amitie 10g's user avatar
3 votes
1 answer
251 views

Setup IPv6 network - no connectivity

I have a SonicWall TZ-300 firewall and I'm trying to setup a simple IPv6 network. Unfortunately, the Windows computer is not getting internet access (browse or tracert -6 to google IPv6). See below my ...
rd1218's user avatar
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-1 votes
1 answer
208 views

Direct Access IPV6 Routing

So here is the situation... I'm setting up direct access on windows server 2022 and im getting a network adapter error that i need to "Publish the IPV6 routes on the network adapter that connects ...
Chris Sikel's user avatar
1 vote
0 answers
65 views

SonicWall NAT64

I need to forward IPv6 packets to internal IPv4 server. Please see below my description and attempts made. I'm working with SonicWall appliance. WAN interface has both IPv4 and IPv6 active. DNS is set:...
rd1218's user avatar
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0 votes
1 answer
5k views

How to enable IPv6 on Ubuntu 20.04

I'm trying to enable IPv6 support on ubuntu 20.04 with no success most resources i find online involve adding the following lines to /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 0 net.ipv6.conf....
Xsmael's user avatar
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1 vote
0 answers
47 views

GCP VPC IPv6 routing to an OpenVPN instance

Previously, on premises, I successfully setup an OpenVPN server (on Ubuntu) that assigned globally routable IPv6 addresses to VPN clients (which is a project requirement). A generous /48 IPv6 prefix ...
Paulo's user avatar
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1 vote
0 answers
127 views

Retrieving IPV6 address of connections on Apache2 & Ubuntu 20.04

I'm unable to get IPV6 addresses from connections to my server. All connections display an IPV4 only even when the IPV6 is available. UFW has apache full and V6 allowed. To ...
Wakka's user avatar
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1 vote
2 answers
354 views

IPv4 to IPv6 NAT on AWS

AWS supports connecting to external IPv4-only services from an IPv6-only node using NAT64. Is there an equivalent for the reverse? For context, I have an EKS cluster, which is currently IPv4-only, all ...
Ralf's user avatar
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2 votes
1 answer
98 views

Per user assigned IPv6 addresses for outbound requests

I'm running some VMs in a Kubernetes cluster on behalf of my clients. These VMs make occasional requests to external services. This works fine, but the IP address seen by these external services is ...
mangafaua's user avatar
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0 votes
0 answers
116 views

Adding a whole /64 block to a network interface - again!

Okay, so, there were A LOT of different answers for this thing. Someone had the same problem as me. Here's what i tried already from all these existing answers: disabling DAD and enabling nonlocal ...
ololololololo's user avatar
0 votes
0 answers
172 views

SSH tunnel to access dual stack resources in AWS (IPv4 + IPv6)

I am trying to setup a Bastion and use it as an SSH proxy to access all my private resources in AWS. I am having hard time debugging why an SSH tunnel to a specific host with dual stack (IPv4 + IPv6) ...
MaesterZ's user avatar
0 votes
2 answers
243 views

What is the best way to redirect port 80 connections to port 8080 with ipv6?

As I understand it, IPV6 is supposed to get rid of this whole port forwarding requirements. However if I want to host a web server on port 80 with something like python or javascript i'd still need to ...
Stanislas's user avatar
0 votes
2 answers
117 views

Server connection error on wifi

I have a server running debian 11 server running Mailcow. It works fine, but every now and then one of my clients will report a connection error. This connection error only appears when they use their ...
aforbes's user avatar
-1 votes
1 answer
431 views

How to set DNS return ipv6

I wanna get ipv6 when ping hostname, but with AD DNS manager, it always give ipv4. and below is my info. currently for it to work with ipv6 is either add ipv6 to hosts file or delete the ipv4 from DNS ...
Eng's user avatar
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