0
votes
3answers
53 views

is it possible in this case to get two IPv6 networks to communicate over the IPv4 Internet?

I have a setup of a laptop connected to a cellular IPv4 network (3G usb dongle) and PC connected to another IPv4/IPv6 network. Both have been configured to run as IPv6 routers and each has its IPv6 ...
0
votes
2answers
50 views

How many IPv6 addresses can one network card have assigned to it, and what is the benefit?

This is not my area of expertise, so forgive me if I am getting this completely wrong. Some datacentres are now offering IPv6 addresses and potentially 100s per VM. What would the benefit of this be? ...
0
votes
2answers
73 views

IPv6: “Destination unreachable: No route” Routing error?

I've got an IPv6 address added to a bridge (sysctl has been configured to enable forwarding). However whenever I try to ping an IPv6 host it fails with the following error: PING ...
0
votes
1answer
59 views

Configure IPv6 on FreeBSD webserver

Seems I just can't nail the right rc.conf configuration for IPv6 on my FreeBSD 10 VPS. I'd like to go completely IPv6 and tutorials/instructions i followed aren't really working for me somehow. It's ...
12
votes
2answers
207 views

How should I temporarily disable IPv6 for an entire network?

We have a medium sized network with IPv4 and IPv6 across it, and our upstream provider is making IPv6 go away for two weeks while they do... something. (It's "experimental" and we don't pay for it, ...
0
votes
1answer
194 views

Tomcat & Java not listening on IPv6

We've got a webserver running Ubuntu 12.04 LTS, Tomcat 7 and Oracle Java. So far, we have been serving a web app on IPv4 address on ports 80 and 443 (80 redirects to 443). I'm trying to make the ...
0
votes
1answer
258 views

Mangling traffic from a Mikrotik Router

I have a MikroTik powered Router in the house with a couple of internet connections (2 200/10Mb Cable modems and a 100/20Mb VDSL Line). I am using Mangle rules to set routing marks and NAT rules to do ...
2
votes
1answer
87 views

Can I use NAT64 to route public IPV6 traffic to internal IPV4?

I have a bunch of public IPv6 addresses and some services that run IPv4 only. Can I use NAT64 to connect these services? Is there another solution like a proxy or something?
2
votes
2answers
100 views

IPv6 servers and IPv4 client base

As IPv4 addresses are running out rapidly, a time will come when there will not be even single IPv4 address available for allocation. But, huge number of devices will still be running on IPv4. ...
6
votes
3answers
682 views

DNS servers already use anycast. Will adding more IPs enhance scalability?

RFC 1034 requires us to assign at least two IP addresses for DNS servers. However, redundancy can already be achieved by a single IP address if we use anycast addressing. BGP anycast seems to scale ...
0
votes
2answers
80 views

IPv6 address not available from outside

Since Hetzner pretty much doesn't give out any IPv4 addresses, no matter what the reason is, I decided to give IPv6 a try. These is the assigned IP address subnet mask IPs: 2a01:4f8:190:5112:: /64 ...
2
votes
2answers
84 views

Logging the outgoing port for IPV4

I need to become an IPV4 and IPV6 expert in a couple of hours. Our company is being bullied by the internet legislator in our country to move fast to offer the site in IPV6 only (we are just content ...
0
votes
0answers
71 views

Couldn't load target `DNAT':No such file or directory

Trying to do some ipv6 nat and running into an error from ip6tables $ip6tables -t nat -N IPV6-BRIDGE $ip6tables -t nat -A PREROUTING -p all -d 2600:3c01::f03c:91ff:fe6e:2563 -j IPV6-BRIDGE $ip6tables ...
1
vote
0answers
23 views

IPv6 and AdvManagedFlag

RA messages have AdvManagedFlag. If this flag is ON then host "should use stateful autoconfiguration to obtain addresses" (RFC 2462). But RA messages are processing by the kernel. How do we know that ...
1
vote
2answers
258 views

How to route public ipv6 address to private lxc container address?

I have a pool of public ipv6 address I want to use to expose lxc containers. On the host machine I created a macvlan interface eth0-macvlan and bound a public address to it 2600:3c01:e000:83::1/64. I ...
0
votes
1answer
50 views

Worldwide IP Latency [closed]

I want to create a simulation of the protocol MIPv6 (http://www.ietf.org/rfc/rfc3775.txt), for this reason I need information about latency, jitter and round-trip time. My first guess is install ...
3
votes
1answer
217 views

How to ping ipv6 interface

I'm trying to get familiar with ipv6 I don't understand why I can't ping this interface at the inet6 addr eth1 Link encap:Ethernet HWaddr 08:00:27:77:9e:77 inet addr:192.168.33.10 ...
4
votes
3answers
196 views

OpenBSD default gateway outside subnet

My ISP offers IPv6 by default. However, my ISPs IPv6 setup appears to be a bit strange because the default IPv6 gateway is located outside of my servers subnet. Under linux it is possible to setup a ...
3
votes
1answer
146 views

Can't get IPv6 setup statically using CentOS6 on a 1and1 dedicated server

I have a server at 1and1 that I'm trying to setup with a set of static IPv6 addresses. I can't get it to work and have tried every forum and guide I could find on google. Their tech support has told ...
0
votes
0answers
106 views

Ipv6 configuration in VPS Server

Currently I have a VPS where I use different ips as interfaces, like curl google.com --ipv4 --interfaces venet0:1 The vps has ipv4 and some ipv6. Usually the vps are managed with OpenVZ, Xen, or any ...
1
vote
0answers
44 views

snmpget on IPv6 local address timesout though snmpd is listening on ipv4 and ipv6

I am doing snmpget from a RHEL machine to the localhost. It works for IPv4 and doesn't work for IPv6. # snmpget -v2c -c public udp6:[::1] sysName.0 Timeout: No Response from udp6:[::1]. # snmpget ...
4
votes
1answer
881 views

Docker will only bind forwarded ports to IPv6 interfaces

Is there a way I can tell docker to only bind forwarded ports to IPv4 interfaces? I have a machine running on Digital Ocean with IPv6 disabled: # echo '1' > ...
1
vote
0answers
84 views

How does IPv6 forwarding work when I have an ubuntu router as well as a local router [closed]

I had this question about ipv6 forwarding.I have an Ubuntu machine with 2 network interfaces (eth0,eth1). Lets say the interface eth1 supports ipv6 addressing and has an ipv6 address of bbbb::100/64. ...
-1
votes
1answer
2k views

Sending netmask and gateway/route with dhcp for ipv6

I have setup a DHCP server to assign ipv6 to my clients. However, both the "routers" and "subnet" OPTIONS are ignored. I have read that ipv6 does not get theese from the DHCP, rather from the router ...
1
vote
1answer
96 views

Changing ipv6 netmask and gateway on running interface

I am trying to change the netmask and gateway of a running ipv6 interface. On ipv4, I can simply do something like: ifconfig eth0 netmask 255.255.255.0 gateway 123.123.123.123 How would I do this ...
1
vote
0answers
156 views

How to have JunOS to learn IPv6 default route from RA?

All is in the title, I'd like to have a JunOS learning it's IPv6 default route (and eventually addresse) from the internet connected router making RA, like an end-user computer, is this possible ? I ...
1
vote
2answers
162 views

Why do I still have traces of IPv6 on a linux host with IPv6 disabled?

When looking at my Observium monitoring, I just found strange results on this graphs "IPv6 Packet Statistics", this server is on a IPv4 network with IPv6 disabled on the server itself with : ...
0
votes
2answers
3k views

Getting an IP from an ipv6 dhcp server

I have the following lab: DHCP SERVER [Centos 6] /etc/dhcp/dhcpd6.conf default-lease-time 2592000; preferred-lifetime 604800; option dhcp-renewal-time 3600; option dhcp-rebinding-time 7200; allow ...
0
votes
2answers
53 views

Adding an ipv6 range with dual stack [duplicate]

I have a range of ipv6 addresses available (native) and want to use them. I 've setup the kernel to support ipv6 and installed the necessary tools (iproute2 etc). I am having a problem understanding ...
-1
votes
1answer
82 views

How multicasting grouping address works ? How can I add nodes to the existing group of multicasting group? [closed]

I am a newbie to the networking and working on the 6LoWPAN protocol and I am trying to get the multicasting to work on the network. But I don't know how to create group for multicasting and how to ...
1
vote
1answer
59 views

Server 2008 IPv6 Connectivity issues

I am having issues with my IPv6 connectivity via Windows Server 2008. External traceroute shows each hop along the path, including the servers gateway. It then times out, never reaching the host. ...
1
vote
2answers
139 views

ipv6 Unrecognised Command on Cisco 3400

I have two identical Layer 3 switches, running identical Cisco IOS Versions. One of the switches, I can configure with ipv6. The other switch however, tells me "Unrecognized command" when I try any ...
0
votes
1answer
152 views

IPv6 and IPv4 mapped address

I've a box with 1 private IPv4 (192.168.0.X) and some IPv6 (let's call one Y::Z). I have an application listening on 192.168.0.X on port 1234 and an application that want to connect to that service ...
0
votes
4answers
3k views

IPv6 only works after pinging the default gateway.

We now have 2013 and I thought it is long overdue to activate IPv6 on my server. But unfortunately, I ran in some problems. To be honest I only have litte experience with IPv6 So I hope you can help ...
4
votes
2answers
132 views

IPv6 prefix management

So, my SiXXS' POP seems to be in trouble and I was thinking in changing to HE. The idea is connect to HE, change radvd setup and... lots of other thinks: UFW, specially in laptops, which only allows ...
3
votes
2answers
121 views

Need to know how IPv6 was disabled

I have a RHEL 6.3 server that has IPv6 disabled. If I enter ifconfig I get the following: eth0 Link encap:Ethernet HWaddr 00:50:56:9F:0F:61 inet addr:10.3.72.76 Bcast:10.3.75.255 ...
4
votes
1answer
271 views

Linux server reboot brings down LAN network

I have a strange problem in my office network. I have a physical server which runs ESXi 4. Every time I reboot a linux virtual machine (Ubuntu Server 12.04.1 LTS) the entire LAN network goes down. ...
1
vote
1answer
491 views

IPv6 web servers without IPv4 address

IPv4 IPs getting rare and more expensive and I wonder if it is possible to switch our web servers completely to IPv6. I know it is advised to use IPv4 and IPv6 but I still would like to know: Is ...
2
votes
0answers
1k views

NAT64 configuration with tayga on Debian 6

I'm trying to implement NAT64 with tayga on my server and came to a point where I'm not sure how to proceed. My server is connected via one IPv4 address and one /64 IPv6 address block to the ...
2
votes
0answers
680 views

Enabling IPv6 with OpenVZ using Proxmox 2.2

I'm trying to enable IPv6 on my Debian nodes (OpenVZ) using venet; my host is under Proxmox 2.2 (kernel 2.6.32-16-pve), and it seems the routing fails. My host correctly pings all my nodes; all my ...
3
votes
1answer
1k views

Forwarding IPv6 traffic

How can I forward IPv6 traffic from my tun0 interface to the eth0 interface? ifconfig: eth0 Link encap:Ethernet HWaddr 00:16:3E:12:77:54 inet addr:208.111.39.160 ...
3
votes
2answers
297 views

/64 routed to my assigned IPv6 address?

So I have a vps provider for a linux server, it states this in my network dashboard on their site: 2607:f840:0044:0022:0000:0000:0000:0000/64 is routed to this server (2607:f840:0:3f:0:0:0:eaa) ...
1
vote
1answer
236 views

IPv6-“GARP”/ Gratuitous ND

I am maintaining an office network with several VLANs. These VLANs are terminated by a redundant pair of Linux boxes as router. Between those I am running VRRP (with keepalived). On failure I am ...
1
vote
1answer
427 views

Fritz!Box IPv6-Address different than IPv6-Prefix

In my Fritzbox it states the following: IPv6-Adresse: 2a02:8070:600::14b6:c7******, Gültigkeit: 100465/86065s IPv6-Präfix: 2a02:8070:62c:3200::/56, Gültigkeit: 100464/86064s I am not able to ...
0
votes
2answers
162 views

IPv6 static routes

I am looking to configure a few hosts with IPv6 on my network. The router (running CentOS 5) is configured with an Hurricane Electric (HE) tunnel which works fine on that host. However, I would like ...
1
vote
1answer
488 views

How do I configure tinydns (with fefe's IPv6 patch) to listen on IPv6 address?

I'm setting up my network to support IPv6. I have static IPv6 addresses assigned to each interface of my router, and radvd advertising different prefixes on each interface. The next step would be to ...
0
votes
1answer
265 views

Operation not permitted on ping6 after mip6d establishes MIPv6 tunnel

I'm very much out of ideas here: I run mobile IPv6 on Ubuntu oneiric, with a simple fixed-address setup. mip6d establishes a tunnel, but as soon as the tunnel establishes I lose all network ...
46
votes
3answers
11k views

How does IPv6 subnetting work and how does it differ from IPv4 subnetting?

This is a Canonical Question about IPv6 Subnetting. Related: How does IPv4 Subnetting Work? I know a lot about IPv4 Subnetting, and as I prepare to (deploy|work on) an IPv6 ...
0
votes
1answer
509 views

Ping6 fail on linux

I have 2 linux box configured with IPv4. I have tried adding IPv6 to them. I have issued this commands on box1: ip -6 addr add fd32:2d7f:f3c1::1/48 dev eth0 And I get this: inet6 addr: ...
4
votes
3answers
3k views

How to get IPv6 running properly?

So, my problem is that I just can't get IPv6 to work. Ping6 just tells me connect: Network is unreachable when I try to ping ipv6.google.com for example. ifconfig looks like (a tad censored): eth0 ...