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.

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How to make IPv6 static routes persistent on CentOS?

Static routes are forgotten once the network service is restarted. However, IPv4 static routes can be made persistent by adding them to /etc/sysconfig/static_routes. This file is read by the network ...
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Smallest Linux/BSD distribution for IPv6 testing?

I'd like to do some IPv6 testing at home, using VirtualBox. I could create a few VMs and leave it at that, but I feel that to really test IPv6 you have to scale up to many nodes. So I wonder: what's ...
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How to check a Fedora system if IPv6 is disabled or not?

I remember that some distribution installers asked in the past if IPv6 should be enabled or not. Perhaps the Fedora installer did (or does) it as well. How do I easily check a Fedora system (>= 17) ...
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Linux: Is there a IPv6 equivalent to the IPv4 kernel option accept_local?

Since linux kernel >= 2.6.33 the kernel option "accept_local" can be modified: /proc/sys/net/ipv4/conf/${interfaceID}/ accept_local - BOOLEAN Accept packets with local source addresses. ...
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Linux bridge blocks UDP packet from tap interfaces

Introduction: I'm working on a 6lowPAN projects of Wireless Sensor Networks. Basically, I have a set of nodes (Contiki OS) which are running on a linux host. Each nodes have its own tap interface ...
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postfix add single IPv6 address

I have my webserver set up to send out email as a smartserver using postfix and it does not allow any other machines on my network to send mail through it. I've been able to send email from my ...
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460 views

Control source address for whois queries

is it possible to execute the command "whois" and choose the outgoing ip for the query? I have mounted several IP's on my network interface "/etc/network/interfaces" for ssl porpuses, but would be ...
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How to configure an OpenWrt 10.03 router to forward an IPv6 connection to the clients?

So I have a TL-WR1043ND router with OpenWrt 10.03 on it. I have clients connected to it through the LAN ports. My ISP provides me a /64 IPv6 block, and I'm using PPPoE authentication. How can I ...
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IPv6 address changed after upgrade. Why? and how can I harden my .htaccess against this?

I noticed in my local webserver logs that the IPv6 address of my desktop changed after upgrading to Kubuntu 12.04. inet6 addr: ...
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EUI64 and ipv6: how to use own EUI64 for IPv6 autoconfiguration

As I heard the extended unique identifier (EUI-64) can be used as the lower 64 bits of a IPV6 address. How can I set my own EUI64 = ( IEEE_company_ID + manufacture_ID) on the interface on Linux SUSE ...
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How to disable IPv6 on OpenBSD?

I'm sure that in my network I will not use IPv6 only IPv4. So according to the KISS principle I will need to disable it. How can I do it? OS is OpenBSD 5.1.
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Route and “e” flag

k# route -6 Destination Next Hop Flag Met Ref Use If ::/0 fe80::8001 UGDAe 1024 0 0 eth0 [...] What does flag "e" mean?
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arping equivalent for IPv6

What is an equivalent for IPv6 of arping -q -c 3 -A -I [device] [ip]? I know, there is not an arp in IPv6 and Neighbor solicitation used instead, but which linux user space tool can send such ...
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1answer
697 views

snmp/snmptrap support of ipv6

I have IPv6 only (not dual stack) system I wondering how to - send snmptrap from this system? - configure snmpd to be able to access it? I mean, is snmp is ready to use in IPv6 only environment?
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Static IPv4 & IPv6 configuration on CentOS 6.2

I try to configure static IPv4 & IPv6 configuration on CentOS 6.2. The configuration below works perfectly : # ifconfig eth0 x.x.x.x/29 # route add defalt gw x.x.x.y # ip addr add dev eth0 ...
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How do I setup two or more IPv6 address on one NIC in FreeBSD?

How can I assign two or more IPv6 address on one NIC. I tried Google but no luck. I've done it with ipv4 but ipv6 can not.
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2answers
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IPv6 NDP timer problem

Need to change Fedora Linux's IPv6 stack for NDP DAD timer changes. How to locate the Fedora's IPv6 and IPv4 stack in Fedora distribution dvd/site so that, we can recompile and generate new stack ?
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IP rule for IPv6

When I try to add an IP rule for IPv6 on my Linux system, it errors out: $ ip -6 rule add fwmark 0xfab lookup 0xf RTNETLINK answers: Address family not supported by protocol I checked out the IP ...
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3answers
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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 ...
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2answers
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How to disable requesting AAAA records when I have no IPv6 address?

Why can I see AAAA DNS requests when I run tcpdump on my Scientific Linux PC when I haven't got any IPv6 addresses? I already rebooted after setting NETWORKING_IPV6=no in /etc/sysconfig/network and ...
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1answer
533 views

Can't get Hurricane Electric IPv6 tunnel to work on Fedora

I have recently moved to a university where all computers get a public IPv4 address. Since the teredo tunnel I was using doesn't work anymore and I have a public address, I am wanting to use Hurricane ...
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How to set up the server to use IPv6 network

I have a server which is able to connect the network through IPv6 tunneling. I want to use it as a proxy server. I have to things to understand: How to set up the DNS? Is there any open DNS that ...
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3answers
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General Linux support for IPv6 ready?

From an end user perspective, what needs to be, and have been done, by developers to support IPv6 in the Linux kernel and Linux distributions? In other words, when (and if) someday the worlds ...
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1answer
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Inability to use IPv4-mapped IPv6 on debian squeeze

I have a squeeze box that I'm testing ipv6 on... eth3 is the interface... if I set up an 'normal' ipv6 address (::101:c0a8:3132/120), I see expected results in ifconfig... eth3 Link ...
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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 ...
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2answers
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How do I set up an IPv6 tunnel in Fedora?

I have been experimenting with IPv6. Hurricane Electric through their http://tunnelbroker.net service offer a free IPv6 tunnel. I would like to be able to use this reliably on my Fedora 14 desktop ...
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avoid IPv6 link local address on interface

I have a setup with virtual Xen hosts connected to a set of VLAN-s. On Dom0, I have set up a bridge for each of my VLAN-s to connect DomU-s to. Bridges are set up in /etc/network/interfaces like ...