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.
Questions tagged [ipv6]
517 questions
275
votes
8 answers
Convince apt-get *not* to use IPv6 method
The ISP I work at is setting up an internal IPv6 network in preparation for eventually connecting to the IPv6 internet. As a result, several of the servers in this network now try to connect to security.debian.org via its IPv6 address by default…
Shadur
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46
votes
3 answers
What is the difference between "all", "default" and "eth*" in /proc/sys/net/ipv[46]/conf/?
In sysctl, the /proc/sys/net/ipv[46]/conf/ keys have the following subkeys: all, default, and a key for each network interface. For example, on a machine with a single network interface eth0, it will look like this:
iserv ~ # ll…
Martin von Wittich
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30
votes
2 answers
netstat — why are IPv4 daemons listening to ports listed only in -A inet6?
I have a computer with:
Linux superhost 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u3 x86_64 GNU/Linux
It runs Apache on port 80 on all interfaces, and it does not show up in netstat -planA inet, however it unexpectedly can be found in netstat -planA…
Mischa Arefiev
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24
votes
2 answers
How to add ipv6 default route
I have the following setup
Linux 1 Linux 0
eth1 eth0-------------------eth0
14.14.14.80 19.19.19.20 19.19.19.10
2005::5/64 2004::3/64 2001::3/64
From Linux0,…
kishore .
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23
votes
2 answers
What is the purpose of avahi on a RHEL 7 server?
Running a server machine with CentOS 7, I've noticed that the avahi service is running by default.
I am kind of wondering what the purpose of it is.
One thing it seems to do (in my environment) is randomly disabling IPv6 connectivity, which looks…
maxschlepzig
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21
votes
2 answers
How do I get the pingable IPv6 address of my machine?
when I try:
$ ip -6 addr
I get something like:
inet6 fe80::d773:9cf0:b0fd:572d/64 scope link
if I try to ping that from the machine itself:
$ ping6 fe80::d773:9cf0:b0fd:572d/64
unknown host
$ ping6 fe80::d773:9cf0:b0fd:572d
connect: Invalid…
marathon
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19
votes
2 answers
"IPv6 support is disabled" warnings
I get the error while running a script which tries to send emails.
send-mail: warning: inet_protocols: IPv6 support is disabled: Address family not supported by protocol
send-mail: warning: inet_protocols: configuring for IPv4 support…
Swagatika
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19
votes
3 answers
How to get Pi-Hole to work with IPv6?
At home I have installed Pi-Hole on a Fedora 28 machine, and it is now working properly serving IPv4 addresses via DHCP, acting as the DNS server, and blocking IPv4 addresses as appropriate. However, it seems to be failing to block IPv6 addresses.…
Mike S
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18
votes
4 answers
IPv6 addressing, dynamic prefix static local part
The router on my network hands out an IPv6 prefix assigned by my ISP. This prefix is dynamic but "fairly sticky".
I would like my machines to automatically pick up the prefix advertised in the RAs, but combine it with a user-specified local part…
plugwash
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15
votes
3 answers
DHCPv6 prefix delegation server for linux?
What linux DHCPv6 client can I set up so it requests a prefix on one interface and then on all the other interfaces it will give out addresses (or if requested, a smaller prefix delegation)? It would also need to set up the routes and router…
Azendale
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15
votes
4 answers
Is it better to set rules in ip6tables or disable ipv6?
I have the following network configuration:
# ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:e0:1c:73:02:09
inet addr:10.1.4.41 Bcast:10.1.255.255 Mask:255.255.0.0
inet6 addr: fe80::2e0:4cff:fe75:309/64 Scope:Link
…
Mikhail Morfikov
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14
votes
2 answers
Meanings of ip address notation [::]:[someport]
what does this ip address notation means [::]:[4443].
captainchhala
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14
votes
2 answers
curl request to IPv6 localhost gets stuck
A docker container of mine exposes a HTTP interface on port 8500, which is
mapped to host port 8500. It is not IPv6 enabled.
This still means, I should be able to access it at
localhost:8500. IPv6 is preferred, so I end up with a request to…
mknecht
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14
votes
1 answer
Routing public ipv6 traffic through openvpn tunnel
What I'm trying to do is to route IPv6 traffic through a vpn tunnel. That way, I should be able to use IPv6 in a network that doesn't support IPv6.
I have a VPS which has an IPv6 block assigned. Part of this block I want to use for openvpn clients.…
Ikke
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13
votes
2 answers
How to check if IPv6 is enabled on a Debian Linux?
Can one disable the IPv6 stack on Debian Linux, especially Wheezy? If so how do I know if it's disabled on a system?
JohnnyFromBF
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