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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Advantages of IPv4 over IPv6
In theory, how IPv4 is better than IPv6? I need only advantages of IPv4 for study purposes.
In another words - what are the pros of IPv4?
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Which Linux distributions support IPv6?
Which Linux distributions support the IPv6 stack (like Windows Vista supports IPv6)?
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Do you think NAT is largely responsible for the delay in IPv6 adoption?
I'm wondering if this is really the case, or, if when IPv6 does get widespread adoption, we will still hide all the machines on a network behind a single (or few) IP address under the assumption that ...
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How do I convince management to approve IPv6 deployment?
I currently have the idea to deploy IPv6 on the corporate network of my enterprise. But my boss (CIO) asked me what the benefits are? And I did not have an answer.
So what could I say to make the ...
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Setting up IPv6 on Apache2
Currently I have the "ports.conf" with the following content:
NameVirtualHost *:80
Listen 80
<IfModule mod_ssl.c>
Listen 443
NameVirtualHost *:443
</IfModule>
<IfModule ...
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What are the IPv6 Public and Private and Reserved ranges [duplicate]
I just want to know what are all the public IPv6 ranges which ISPs or other users can use?
Also need a list of addresses which can be used in private networks and also the list of addresses which ...
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IPv6 doesn't work correctly on AWS ELB
I configured my Elastic Load Balancer to work as dualstack. I created records set on Route 53 with types A and AAAA pointing to Elastic Load Balancer. Over IPv4, it works
I used this site to test my ...
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Can you use IP V6 for name server records
This might sound like a stupid question as I have a very basic grasp of DNS management, but I'm looking for a new VPS and most providers only offer one IPV4 address, which doesn't validate on http://...
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IPv6 link-local routing
Link-local address:
Routers do not forward packets with link-local addresses.
What I want to know is: that makes sense if the destination is a link-local address, but what if I have a box that ...
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iptables for ipv6 address port forwarding to localhost port
Say I want to redirect 2a00:1450:400c:c01::71 on Port 443 to localhost Port 12345.
How to do that with Iptables?
Update
Okey, it's Weechat which running an SSL relay on a port >=1000. It can make ...
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Does it make sense to only log 64 bit of IPv6 addresses for abuse purposes?
Say I am operating a public service. Generally, people behave, but every once in a while someone does not, and it is usually good to know who you're receiving that blessing from.
Hence, assuming
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Why is 2002:: an invalid IPv6 addresss?
I'm currently learning IPv6 and during a test I tried to configure an interface with the global IPv6 address 2002:: and failed, stating that is an incorrect address. And I have noticed that if I try ...
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DHCPv6: passing delegated prefix to local RA
I currently have an Airport Extreme as my home office firewall. In addition to handling IPv4 NAT, my ISP (Comcast) delegates an IPv6 prefix to the Airport, which in turn assigns the delegated prefix ...
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How to allow 6to4 through iptables firewall?
Im trying to allow 6to4 though my ipv4 firewall on Debian 6 (Squeeze) but without much luck, it seems most of the syntax used by other OS's isn't quite supported in Debian's iptables.
I'v tried: (I ...
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IPv6 can I use a link local address as my default Gateway?
can I set the default GW to be the Link Local address of the next hop router. I understand this is a strange thing to do, I'm mostly wondering it is possible?
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How ISPs will assign IPs /subnets for end users in IPv6
Consider two scenarios:
The end user has a simple computer, dual-stack
The end user has a LAN behind a dual-stack router
How will ISPs differentiate each one of these kind of users in IPv6?
An ...
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Network isolation with IPv6
It is my understanding that network address translation (NATing) goes away with IPv6. How do we isolate network resources to those that need them from the rest of the internet? I am specifically ...
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Ping IPv4 addresses from an IPv6 host
So, I've been given to believe that IPv6-only clients can access IPv4 servers by using addresses like: ::ffff:0:74.125.226.80 (that would be an address for google.com). I'm not IPv6 yet, but I may be ...
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How to completely disable IPV6 on Mac OS X (10.5 +)?
I'd like to avoid my Mac OS X machine from using ipv6 at all.
I'm looking for a programmatic way to disable ipv6 on every network interface and, possibly, to avoid ipv6 support by the kernel at all.
...
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Does Linux support IPv4 mapped IPv6 addresses?
I work in a mixed IPv4 / IPv6 environment. I read that IPv4 addresses can be mapped into the IPv6 space with this syntax
::ffff:1.2.3.4 (1.2.3.4 is the IPv4 address)
Does Linux support this ...
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Can I use IPv6 today?
My VPS (Virtual Private Server) provider offers unique IPv6 addresses much cheaper than IPv4, but what can I use it for? The VPS runs Debian 5.
I currently use the VPS for web hosting and running IRC ...
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KVM virtual machines cannot reach IPv6 web sites
I have a freshly installed Windows Server 2008 R2 SP1 virtual machine which is completely unable to reach any IPv6 web pages, despite apparently having proper IPv6 connectivity. In addition, other ...
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How do I enable IPv6 on Fedora 28 on Amazon EC2
I can't seem to get IPv6 working in Fedora 28 in Amazon EC2 (so using cloud-init and DHCPv6).
It works in RHEL 7 with the configuration described here. Applying the same configuration to Fedora 28 ...
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Ubuntu defaults to IPv6, should default to IPv4
Ubuntu 16.04.5 with kernel 4.4 used to work as intended: IPv4 is default. Since changing to kernel (hwe) 4.15, it uses IPv6 as default.
It has IPv6 available via Tunnelbroker, broadcasted by the ...
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Making changes to default IPv6 route persistent in CentOS 7
I have several IPv6 addresses on a CentOS 7 server and need to make a specific v6 address the default address used in routing. I have been able to do this by modifying the route table.
ip -6 route ...
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Running multiple services on different servers with IPv6 and a FQDN
One of the things NAT has permitted us to do in the past decade is split physical services onto different servers whilst hiding behind a single interface.
For example, I have example.com behind a NAT ...
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IPv6 working fine, IPv4 throws OpenSSL error
I am building a webserver ( http://blog.linformatronics.nl/ ), which functions just fine on both IPv4 and IPv6 and when using a non-SSL connection. However when I connect to it through https, IPv6 ...
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Disable IPv6 address autoconfiguration on Windows XP
In Windows Vista and later versions, you can assign a static IPv6 address and the gateway to the interface via a GUI or alternatively with netsh. Addresses can also be statically configured on Windows ...
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Adding a public IPv6 address to a Linux VM in Azure
I have a Centos7 VM instance running in Azure. It has a public IPv4 address reachable from the internet. I would like to add a public IPv6 address to this instance's network interface but I cannot ...
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Finding all Public IPv4 and IPv6 addresses in a UNIX shell script
For monitoring purposes, I'd like to find out all public IPv4 and IPv6 addresses of a mobile-warrior UNIX box.
Note that this is different from Finding the Public IP address in a shell script because ...
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IPv6 address lifetime: preferred versus valid lease
What is the difference between "Preferred Life Time" and "Valid Life Time" lease. What is the point of preferred and why not just use valid life time lease? Thanks.
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On IPv6 linux router, autoconf and accept router advertisements for single interface
Apparently right now if you have /proc/sys/net/ipv6/conf/all/forwarding set to a value of 1 that completely disables the auto configuration of Interfaces and routes, but I have a system with one ...
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How does 6rd (IPv6 Rapid Deployment) route over the public internet?
First 6to4:
6to4 allows IPv6 Packets to be transmitted over IPv4. It's used to connect two IPv6 'islands' - not enable IPv4 to talk to IPv6 or vice versa. IPv6 address 2002:AABB:CCDD:: becomes IPv4 ...
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Security implications of enabling IPv6 on my VPS?
My VPS host can allocate me a small block of IPv6 addresses for nothing, and I've kind of wanted to for the sake of trying on my small website/dev VPS.
My main concern is what I have to do to ...
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IPv6: using a link mtu greater than the mtu of the default route
When configuring an IPv6 LAN it may be desirable to use router advertisements to announce a link MTU of either the standard 1500 bytes or something larger to enable usage of jumbo frames, perhaps 9000....
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What is the rationale for using IPv6 Privacy Extensions for link-local (fe80::/64) addresses?
Some operating systems, such as Windows 7 have IPv6 Privacy Extensions enabled by default, which may prove beneficial especially on laptops and mobile devices that are often roaming so as to prevent ...
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NATing IPv4 while routing IPv6
I've the following setup:
client(s) <---> (eth0) router (eth1) <---> wan
I have a static IPv4 address and a /48 IPv6 address block.
I need to connect all the clients to (wan). Each ...
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Win2k8R2 Obtaining DHCPv6 address, but has static configuration
I have a Windows 2008R2 server on a dual-stack network.
IPv4 is working fine (statically assigned) but the IPv6 stack is misbehaving; I have configured it with a static IPv6 address (::bbbb:150 below)...
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Testing IPv6 between Linux boxes on a LAN
I'm attempting to set up an IPv6 testbed. Very basic: Just two Ubuntu Linux boxes talking to each other over a LAN. Both boxes have working IPv4 connectivity, but I have had no luck using SSH over ...
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IPv6 Gateway outside network (OVH)
We a dedicated server at OVH, assigned 2001:41d0:a:72xx::/64
I have set the machines on a segment bridged to the wan, as per
IPv6 public routing of virtual machines from host
The gateway is 2001:...
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IPv6 Neighbor Discovery/Routing Failing for Kernel 3.10
Stupid mistakes led to all of this, read Update 5
Intro
I'm trying to setup a Linux Router (LXC, 3.10.0-123.el7.x86_64) with IPv6.
The provider is Hetzner and I got 2 subnets, one /56 and a /64. They ...
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Router advertisement for ipv6 is advertising link-local adress
I have the following situation: I configured a FreeBSD 9.1 machine as the endpoint of a heartbeat SixXS tunnel on a gif0 interface. It works so far, and I can ping6 via IPv6.
I assigned to another ...
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Linux tc Traffic Shaping for IPv6
I have traffic shaping with tc and htb in place and everything works fine for IPv4.
Now I want to limit the bandwidth for incoming IPv6 ssh/sftp traffic to some reasonable amount, so it doesn't ...
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6TO4 Windows 2003 DNS
This is puzzling me a bit.
We are running server 2003 DNS/DHCP and normally we disable IPV6 on the client end. But I have just noticed with windows 7 and server 2008 R2 if I disable IPv6 then it ...
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Changing global IPv6 address vs. docker using fixed-cidr-v6
To enable IPv6 in my docker setup, I've set this in the file /etc/docker/daemon.json:
{
"ipv6": true,
"fixed-cidr-v6": "2a01:xxxx:yyyy:zzzz/64"
}
I got the 2a01:xxxx:...
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Fail2ban with nftables and IPv6
EDIT: added additional .conf filer and slightly changed wording as suggested by Marco
I'm running Fail2ban v0.10 which is supposed to support IPv6.
I've set up Fail2ban with nftables according to ...
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Make LXC containers directly accessable with ipv6
First off I have a special IPv6 address allocated to my dedicated server, just 1. A ::1/128 one. But I can assign addresses to eth0 (eg ::2/128, ::3/128, etc).
Now I would like to run LXC containers ...
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Enterprise IPv6 Migration - End of proxypac ? Start of Point-to-Point ? +10K users
Let's start with a diagram :
We can see a "typical" IPv4 company network with :
An Internet acces through a proxy
An "Others companys" access through an dedicated proxy
A direct access to local ...
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Is it possible to run pre-Lion OS X in an IPv6-only environment without static configuration? [closed]
Is it possible to run pre-Lion OS X in an IPv6-only environment without static configuration? From what I've been able to figure out, OS X 10.6.x will acquire an address via SLAAC, but it doesn't ...
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Make Docker listen to the IPv6 address of server, forward IPv6 requests to right container
My server is running on both IPv4 and IPv6. Docker is running on (local) IPv4 addresses (ie 192.168.100.1/24). I did not enable IPv6 inside daemon.json as I understand that to be rather buggy and ...