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, ...

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29 views

Different 'ping6' reverse lookup behavior using ipv4 vs ipv6 dns servers in /etc/resolv.conf

I'm hoping someone could help shed some light on the different behavior ping6 is demonstrating on a GNU/Linux box. The machine is a Linode host which has been assigned both an IPv4 and IPv6 address. ...
3
votes
0answers
39 views

Is net.ipv4.vs.timeout_timewait used also for IPv6?

Does this setting for TCP net.ipv4.vs.timeout_timewait apply only to TCP connections established over IPv4 or does it also apply to TCP connections established over IPv6? I have found this for ...
3
votes
0answers
32 views

Some systems not attempting to register IPv6 reverse

I have a few Windows 2012 systems in my domain that are not dynamically updating their records in the ip6.arpa zone for their assigned IPv6 addresses. I have systems that are publishing their record ...
3
votes
0answers
299 views

IPv6 default gateway route disappear after reboot

I'm using Debian Wheezy on a dedicated server which uses IPv4 and IPv6 at the same time. ifconfig eth0 eth0 Link encap:Ethernet HWaddr 11:11:11:11:11:11 inet adr:90.0.0.1 ...
2
votes
0answers
158 views

Why does an IPv6 route added before virtual machine is started not work

I have an external server at Hetzner with Debian 7 and trying to setup KVM with IPv6 Routing (the same setup works for IPv4 without problems). I have one Ubuntu Server VM with two interfaces which ...
2
votes
0answers
299 views

Networking with lxc containers with local dhcp and external ipv6 double bridge problems

I want to use both ipv6 externally on all my containers, and ipv4 external only on the hosts. I am using Ubuntu 12.04 64bit. For ipv4 on the container I use the DHCP that came with the lxc ...
2
votes
0answers
424 views

IPv6 routing over OpenVPN

Trying to learn how IPv6 works with OpenVPN, so I wanted to setup following scheme. I have a VPS server (Ubuntu), which have been allocated a /48 subnet. ISP ipv6 gateway is XXXX:XXXX:XXXX::1 Server ...
2
votes
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1k views

ip6tables port redirect with TPROXY on IPv6 only

Our server is IPv6 only connected and an applications listen to port 8080 at private network, but we need port 80 at public Internet. On purpose of testing, when opening the firewall for port 8080, ...
2
votes
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291 views

IPv6 Not Routing Properly

I am setting up a RRAS machine for my personal use and for use by a few of my friends. I am currently using Windows Server 2012; but I have tried this with Windows Server 2008 R2. Both systems ...
2
votes
0answers
646 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 ...
2
votes
0answers
332 views

configuring IPsec with IPV6

I am working with racoon tool and ipsec-tools and I have been able to connect two devices with IPSEC working in transport mode. However, I did it with IPv4 addresses and when I change them to IPV6 ...
2
votes
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729 views

Windows 7 Client gets incorrect IPv6 Prefix Length

I am currently setting up IPv6 and DHCPv6 for Server 2008 R2 on my private network for testing. I was able to get DHCPv6 to work by configuring a static, then setting up the scope. I was also able to ...
1
vote
0answers
27 views

Red Hat 6.5- sysctl -w net.ipv6.conf.default.accept_redirects=0

I am in the process of writing a Red Hat 6.5 Kickstart disc with hardened security. I have run a program to determine where the weaknesses are in my system, and apparently there is a medium severity ...
1
vote
0answers
21 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
0answers
87 views

Automatically acquire IPV6 address in CentOS 6

The network has fixed IPv4 address, and automatic acquired IPv6 address. Does anyone have an idea how to setup? Thanks a lot! I didn't use NetworkManager. The following is my setting, but it does not ...
1
vote
0answers
40 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 ...
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vote
0answers
117 views

ISC DHCPD IPv6 for multiple interfaces

I want to assign multiple IPv6 to a server with multiple NIC. As IPv6 RFC defines, each server has a unique DUID that can have one of the 3 formats (LL, LLT or enterprise). And each NIC has an IAID. ...
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151 views

IPv6 Routing / Subnetting

Recently I have installed Citrix Xen Server 6.2 on a machine. My Provider (Hetzner) gave me the IPv6 Subnet 2a01:4f8:200:xxxx::/64. Followed an article in the providers wiki (1) i got it working and ...
1
vote
0answers
148 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
0answers
73 views

Is there any way to programmatically add prefixes to radvd without writing to radvd.conf and restarting it?

I need to create prefix entries on demand to configure a quite large IPv6 net. What I'm doing now is: stop radvd write to radvd.conf restarting radvd But this is quite painful. I wonder if there ...
1
vote
0answers
78 views

Connecting to IPv6 hosts when mobile and on a Surface?

Specifically, at my usual location, I have an IPv6 network which connects to the Internet via a static tunnel set up to Hurricane Electric's tunnel broker ( http://www.tunnelbroker.net/ ). This works ...
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vote
0answers
165 views

Assign IPv6 addresses to kvm virtual machines using DHCP

I created a bridge using brctl called dhcp_test_br, and bind my new created kvm virtual machine to this bridge. Then I ran dnsmasq: dnsmasq --strict-order --bind-interfaces --interface=dhcp_test_br ...
1
vote
0answers
216 views

Some workstations/servers on the domain respond with IPv6 instead of IPv4 addresses, even though IPv6 is disabled across the board

Earlier this week I've noticed some issues on my network. For example when I ping my machine (from my machine) using the hostname (or FQDN), I see a response from an IPv6 address. ...
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vote
0answers
135 views

How do I configure stateful DHCPv6 in Windows Server to allow clients to ping each other?

How do I configure stateful DHCPv6 in Windows Server to allow clients to ping each other? I would like to configure my Windows 2k8 DHCP server to distribute IPv6 addresses in my office network that ...
1
vote
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 ...
1
vote
0answers
310 views

Using TomatoUSB and OpenVPN to tunnel IPv6 traffic

Assume the following scenario regarding the current IPv4/OpenVPN setup: Central Site with a /64 IPv6 (10.0.0.1) | | OpenVPN Server A OpenVPN Server B ...
1
vote
0answers
246 views

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 ...
1
vote
0answers
127 views

Automatic DNS population for routable IPV6 addresses

In ipv4 I can set my DHCP server to populate DNS with hostnames and IP addresses as clients are found. This works well and clients can resolve these DNS addresses to contact eachother over routed ...
1
vote
0answers
488 views

KVM Guests & IPv6, Connectivity breaks after some time

Goal: Assign public available IPv6 adress to every guest Problem: Working IPv6 connectivity suddenly stops working. After starting everything up (network on host, guests) everything works fine. i can ...
1
vote
0answers
489 views

why ping6 fails if tcpdump shows ICMP6 request/reply traffic?

I'm having a very strange problem with IPv6 pings on OpenWRT (fon-ng firmware with IPv6 enabled) and hoping someone can help with investigation. In short - wpan0 interface with address aaaa::1/64 is ...
1
vote
0answers
179 views

Attempting to DNS resolve / relay an IPv6 address for a host

I have a network switch doing IPv6 DNS relay to a Linux box (3.0.4-gentoo #7). The packets (DNS request) are arriving fine at the Linux box. Where I'm stuck now is how to resolve those, either by ...
1
vote
0answers
589 views

I am not able to ping the IPv6 address asigned to the interface on CentOS 5

I have assigned a stativ IPv6 address to eth2 interface and I am not able to ping it. Here is the configuration setup done in /etc/sysconfig/networking/device/ifcfg-eh2 # Intel Corporation 82546EB ...
1
vote
0answers
503 views

IPv6 network in Hyper-V private virtual network

I have created a private virtual network in Windows 2008 R2 hyper-v. Two guests with an adapter each connected to this network is able to ping each other if they use IPv4(used 192.168.10.19 and ...
0
votes
0answers
14 views

Clients losing stateless ipv6 addresses

I'm having problems with Linux VM's at a certain VPS hoster. Periodically the hosts lose their ipv6 address. They go to 'deprecated' and then disappear completely. On the client side I have checked ...
0
votes
0answers
40 views

IPv6 connection dropping on Debian 7

EDIT: I've tried something different based on searching around. This is now my /etc/network/interfaces: # This file describes the network interfaces available on your system # and how to activate ...
0
votes
0answers
32 views

vServer: Configuring single (/128) assigned IPv6 addresses for use as IP address pool for IPSEC (Strongswan) road warriors

I've a new (dev) vServer up and running. Unfortunately the provider only hands out single IPv6 addresses (not even /64 subnets). Now I am a bit confused how to achieve the following: I want to use ...
0
votes
0answers
51 views

FreeBSD 10 IPFW IPv6

I'm struggling to allow IPv6 connections on my FreeBSD 10 server. I have a working IPv6 connection. But IPFW blocks all the IPv6 traffic. #!/bin/sh # # flush existing rules ipfw -q flush # allow ...
0
votes
0answers
35 views

IPV6 not acquired from ipv6 address pool in ubuntu 12.04 for ISC server

Ubuntu 14.04 running in ISC-dhcp-client is not acquiring IPV6 from the pool given in server. Below is vim /etc/dhcp/dhcpd6.conf file default-lease-time 600; max-lease-time 7200; subnet6 ...
0
votes
0answers
80 views

Only specify IPv6 suffix in DSM

I'm using a dual stack connection at home and have a DS213+. As my public IP (both v4 and v6) is dynamic, I'd like to only specify a suffix in my Diskstation's network configuration. My router ...
0
votes
0answers
44 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 ...
0
votes
0answers
130 views

Configuring an IPv6 FreeBSD router works on boot only

I am trying the following: I am having a DHCPv6 server (machine A) with a /48 subnet which will delegate /64 subnets to other routers using the prefix delegation mechanism. One of these routers is a ...
0
votes
0answers
73 views

How to get IPv6 working on a Debian 6 server

I m getting two IPv6 from my vps provider but they are not working at all. I can ping ping6 ipv6.google.com My interface looks like this: ifconfig eth0 eth0 Link encap:Ethernet HWaddr ...
0
votes
0answers
308 views

Configuring DHCP IPv4 and static IPv6 on the same interface

I need to configure on a network interface (eth1) with static IPv6 and get an IPv4 address from DHCP on a CentOS 6 machine? Using the configuration below I only get a dynamic IPv4 address: ...
0
votes
0answers
85 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 ...
0
votes
0answers
85 views

IPv6 VPN and DirectAccess on Windows Server 2012

I have a working IPv4 RRAS VPN server on Windows Server 2012, also set up to allow DirectAccess clients. I want to allow IPv6 through the VPN, but in the RRAS management console, the "IPv6 Remote ...
0
votes
0answers
480 views

Cant connect IPv6 linux server via Putty

Cant connect IPv6 linux server via Putty. Server IP should be like this: 2001:14c0:2:2f6f::6 But when i replace working IPv4 in my putty by this address, it dont connect returning: Unable to open ...
0
votes
0answers
74 views

What means “DNS jumbo-grams: not working” in squid3

I was checking out what information I can get from my installation of a squid proxy and get some statistics. I'm using the internal cgi that provides squid for basic information. But checking out some ...
0
votes
0answers
213 views

I cant access ssh to PC by Ipv6

Ive installed Debian on my PC, its connect to internet by (mobile internet orange). I can access to PC only by tunnel IPv6. Ping works (IPv4 and IPv6) access by ssh (IPv4) also work but I have access ...
0
votes
0answers
178 views

“Connection refused” after setting up IPv6 on Debian

I just set up IPv6 on Debian Squeeze on a hosted root server. Since I rebooted I can't connect to the server anymore. Ping is fine, but HTTP and SSH won't work. When I try to connect with SSH using ...
0
votes
0answers
602 views

Default IPv6 route on debian squeeze does not come up after boot

I have a problem with my default IPv6 route not coming up after boot on a Debian Squeeze system. This is my config (/etc/network/interfaces): # Loopback device: auto lo iface lo inet loopback iface ...