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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.

1 vote
0 answers
12 views

SLAAC and SLAAC+DHCPv6 configuration using udhcp6

I am working on an embedded system and it uses udhcpc6 as its DHCPv6 client. If I set an interface to 'dhcp' in the /etc/network/interfaces file, udhcp and udhcp6 automatically start. I then connect ...
NickG's user avatar
  • 131
1 vote
1 answer
43 views

How to match IPv6 addresses as a host pattern in ssh_config

My VPS listens to SSH on port 222. On my clients I created a ssh_config such that the non-default port needs not to be explicitly provided on the command line every time. (Some daemons which ...
user2690527's user avatar
0 votes
2 answers
31 views

Prevent podman containers from using AAAA results when there are no ipv6 routes

I am having a problem in which applications running in podman containers are attempting to use ipv6 addresses, despite the container having no ipv6 routes (other than the expected link-local addresses)...
larsks's user avatar
  • 36k
0 votes
1 answer
45 views

What other subsystems are responsible for enabling IPv6 in when it has been disabled in sysctl.conf, and how can I track which one is enabling it?

Although I have disabled IPv6 in sysctl.conf (Debian 11), connecting my main switch to an IPv6 enabled router results in IPv6 addresses being allocated on Debian interfaces and I can ping and SSH to ...
vfclists's user avatar
  • 7,619
2 votes
0 answers
84 views

Cannot add a tunnel to /etc/network/interfaces

Note: I already checked this question and this question. The solution of the former is not relevant to my problem and the latter does not have any answers. I have a basic VPS from aeza.net. When I ...
Amirreza A.'s user avatar
0 votes
1 answer
40 views

nmcli: How to re-perform IPv6 router solicitation?

This is a Raspberry Pi running 64 bit Raspberry Pi OS bookworm (debian 12.5). Sometimes when I boot I find that IPv6 hasn't successfully been set up. The local network has an IPv6 capable border ...
nsayer's user avatar
  • 123
1 vote
0 answers
59 views

Why are IPv6 address being assigned although IPv6 has been disabled (Debian 10 and 11)?

Although I've disabled IPv6 using /etc/sysctl.conf net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 IPv6 addresses still show up on the ...
vfclists's user avatar
  • 7,619
1 vote
1 answer
28 views

Packet forwarding from dual stack interface to localhost

I have a linux SUSE host which has both ipv4 and v6 enabled, below are the interfaces:- eth0,app,eth1 however the default route is available for ipv4 via eth0. Kubernetes is running on this host(...
Pranab Das's user avatar
1 vote
2 answers
88 views

Find if network supports IPv6

Is there a way to find out if the IPv6 network cable is disconnected from the server through the terminal? Pinging google won't work as it could be an intranet. Any help would be appreciated!
user2384330's user avatar
1 vote
1 answer
43 views

Is there a way to allow responding to an IPv6 packet sent from a link local address to a regular IPv6 address?

We're currently configuring an Azure load balancer to work with a Linux-based backend supporting both IPv4 and IPv6. As part of the setup, the load balancer performs health checks at regular intervals ...
Brecht Vercruyce's user avatar
0 votes
0 answers
17 views

VM/LXC asks AAAA record in a IPV6 disabled proxmox cluster

I have a Proxmox cluster with IPv6 disabled. Following setting made on /etc/sysctl.conf: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv4.ip_forward = 1 When I do ...
Haseena's user avatar
  • 101
3 votes
1 answer
49 views

Which is My Static IPv6 Interface Identifier?

I've been accustomed to IPv4 for so long and I'm really unfamiliar with IPv6. I recently wanted to add a firewall rule to my OpenWRT router to allow inbound IPv6 connection to a certain port of my ...
citrate's user avatar
  • 151
1 vote
1 answer
137 views

Configuring IPv6 ULA addresses in OpenBSD via SLAAC

I would like to have devices on my network autoconfigure ULA addresses in a prefix generated by https://www.unique-local-ipv6.com/ on my network, which is predominantly IPv6-only. My main router is ...
neezer's user avatar
  • 31
1 vote
1 answer
19 views

Trying to conifugre bridge on GRE interface, facing issue

I have created an ipv6 tunnel by using the following commands: ip link add gre_test type ip6gre remote 2001:4860:4860::8888 local ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff ttl 255 removed actual ipv6 ...
vrax's user avatar
  • 11
0 votes
1 answer
227 views

blank screen after ipv6.disable=1 removal from grub cmdline

I want to re-enable IPv6 on my system which is currently disabled in GRUB directly. But if I remove ipv6.disable=1, I then get a blank (backlit) screen. It took me tonight to figure out that I have a ...
Vlastimil Burián's user avatar

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