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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Windows Server 2012 Local DHCPv6 Stateful & Public Stateless?

I want my LAN to have static IPv6 ULAs from the server's DHCP6, and global IPv6 as well. So it'd look something like this: Server IPv6 Address. . . . . . . . . . . : 2601::1 (public auto) ...
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1answer
21 views

How to setup this IPSec VPN?

I have a main network (Net-A), there my work should be done there. On the other network, I have host server where it can reach to Net-A. On the host server, I'll create a couple of virtual machines, ...
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votes
1answer
22 views

SSH Connection reset on IPv6

When attempting to SSH from an IPv6-enabled host to an IPv6-enabled host, I get: $ ssh remotehost.example.com ssh_exchange_identification: read: Connection reset by peer When I add the -4 option, ...
2
votes
0answers
45 views

Route single IPv6 address using router advertisement

I have a server in my local network that connects to an external VPN server and gets assigned the public IP address 2a02:c200:1:10:3:0:4315:2. Currently, when other computers in my local network ...
24
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2answers
2k views

Why is IPv6 adoption higher at weekends?

Look at the graph of IPv6 adoption rates maintained by Google here: https://www.google.com/intl/en/ipv6/statistics.html Zoom in to the September to December 2015 period. The graph of IPv6 adoption ...
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1answer
57 views

IPv6 resolving as loopback/private IP

I'm running a web crawler and I received some reports from my datacenter about connections directing to private IPs (like 10.0.0.1). I've implemented a loopback/private ip check to my crawler code and ...
3
votes
1answer
63 views

Cannot bind to a specific IPv4 address when making outbound TCP connections, to hostnames that resolve to both IPv4 and IPv6 addresses

I just spent about 6 hours trying to figure this out, and I now believe CentOS/Linux is unable to bind to a specific virtual IPv4 address when connecting to a hostname that has an IPv6 address. This ...
2
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0answers
71 views

Nginx proxy_pass to upstream uses sometimes IPv6 address

Why does Nginx proxy_pass to upstream send sometimes outgoing requests to IPv6? 2015/12/28 14:11:06 [error] 38194#0: *114469948 connect() failed (111: Connection refused) while connecting to ...
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1answer
122 views

IPv6 routing under KVM virtualization

I'm having trouble configuring IPv6 routing under KVM virtualization, and I need your help! On the host machine. It uses bridge (named br0) to give its guest machines Internet access. On the guest ...
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0answers
40 views

Debian Host replies with ICMP Port Unreachable after Router Advertisement (ISATAP)

I'm trying to configure a Debian Wheezy host to get an IPv6 address via ISATAP (using isatapd). This machine has two outgoing interfaces: eth0 and eth0.20 (virtual interface using VLAN 20): 1: lo: ...
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0answers
66 views

ping between ipv6 and ipv4 networks

I have 2 networks (one ipv4 and one ipv6) , I used ospf as routing protocol for both networks. I activate bgp between this 2 networks(R6 and R1) and now R6 can ping the full ipv6 network and R1 can ...
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0answers
48 views

Cannot renew DHCPV6 lease in SLES12

I need to renew the lease of a certain SLES12 box. The machine is configured to use IPv6 only and so far I have tried the following: From here: dhclient6 -r -v eth0 && rm ...
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vote
1answer
66 views

Route all Ipv4 traffic over a 6in4 tunnel using RouterOS 6.x

Would it be possible to route all IPv4 traffic over an IPv6 tunnel? Let me elaborate, let's say I establish a tunnelbroker (HE) 6in4 tunnel, using IPv4 (duh!), but then I want to relay all my IPv4 ...
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1answer
49 views

Cisco IPv6 Proxy-arp like IPv4

Can I disable the proxy-arp in IPv6 in Cisco? I cannot find the "no ipv6 proxy-arp" command in my Cisco router. Please teach me how to do it. Thanks.
2
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0answers
78 views

How to disable IPv4 use on OSX (Or disable Happy Eyeballs)

I have a OSX El Capitain (10.11.2) host that has only IPv6 connectivity. The network uses NAT64 and DNS64 to provide access to legacy IPv4 hosts on the internet. The problem is that when looking up a ...
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votes
1answer
161 views

Enable DHCPv6 in dnsmasq to distribute fixed range IPv6 addresses but failed

Help wanted! I want to create a AP in my Raspbian PI. And i choose dnsmasq as the dhcpv4 and dhcpv6 server. However, my laptop can acquire IPv4 successfully but fail to get a IPv6. Why the dnsmasq ...
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1answer
29 views

IP version in synthetic monitoring context? [closed]

I am trying to setup monitoring on my website and I have encountered with this option IPv4/ IPv6. What could it mean in this context ?
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0answers
48 views

Can you enable IPv6 anycast on a Microsoft DNS server?

I have an anycast address assigned to a Windows 2012R2 server and I can ping it from across subnets. The DNS service doesn't see it as an address it can listen on and nslookup (from the server ...
3
votes
2answers
86 views

How can Apache be configured to listen on a single IPv6 address which does not belong to an interface?

I'm trying to set up multiple Apache SSL vhosts, each on a different IPv6 address. My CentOS7 VPS has a routed /64 IPv6 block assigned to it, let's say 2001:db8:acac:acac::/64, and I can already see ...
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votes
1answer
37 views

Using CloudFormation, I cannot get an AAAA record to work with ELB

I have the following two CloudFormation resources: "TestELB" { ... }, "TestRecordSetGroup": { "Type": "AWS::Route53::RecordSetGroup", "Properties": { "HostedZoneName": "example.com.", ...
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votes
0answers
31 views

ipv6 rDNS with bind

Maybe I just can't wrap my head around ipv6 yet but I'm having trouble returning DNS entries for rDNS. Considering the ipv4 scheme, the following is what I'm aiming for: internal.example.com should ...
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votes
0answers
45 views

Openvpn client frequently uses a different IPv6 address causes a unstable connection

I set up an OpenVPN server on IPV6 recently, it runs well, except for one thing: the client loses connection frequently for Inactivity timeout (--ping-restart). Here's the log infomation on the ...
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votes
2answers
89 views

How to connect a client behind a NAT router to an Asterisk server behind a NAT router?

I have an asterisk setup on a server. The local IP address is 172.22.9.200 and extenal IP address is 75.45.185.100. My client device is an android phone that is connected to a router and it which ...
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3answers
50 views

IPv6: Creating ranges, range values

So I've just been assigned a /64 IP address range. I'm using SolusVM to manage virtual machines. With the /64, I am given the first 4 (octets? I think they're called) so my format is currently ...
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vote
2answers
105 views

Hosting is IPv4 only, can I have IPv6 clients?

My hosting is IPv4 only. My question is whether it is possible to allow IPv6 only clients to access my web (running Window Server 2012 R2). Is this possible using technologies like 6to4 or Teredo or ...
2
votes
1answer
104 views

Multiple default IPv6 gateways

Why is not possible to have multiple default IPv6s gateways configured? On Linux I'm not able to execute two "ip -6 route add default via [gw_ip]", while I'm able to do so with IPv4.
2
votes
0answers
35 views

Windows Firewall Connection Security, require encryption with IPv6?

I've set up Windows Firewall on a Server 2012 R2 to always require IPSec Encryption for all Connection Security Rules. I've then specified Inbound Rules for specific ports and services, and ...
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votes
0answers
19 views

In IIS8, does All Unassigned include ipv6?

In IIS8, when editing the site bindings, does selecting All Unassigned in the IP address dropdown box include IPv6 addresses?
1
vote
2answers
103 views

Dual stack linux router, can't forward IPv6 prefix

I have a small offic here with a few workstations and I would like to implement a small server for stuff like a proxy server, samba etc. This is the topology of said network: +-----+ dynamic ...
1
vote
1answer
100 views

nginx virtual hosts not working after enabling IPv6

I've just enabled IPv6 on my nginx 1.8.0 webserver based on Debian Jessie. To do this I've edited my Virtual Host-Config: server { listen 80; listen [2001:1608:10:160:34::2]:80; ...
1
vote
0answers
143 views

Build IPv6 over IPv4 tunnel between server and home network

On one side I have an Ubuntu server in a data center that has IPv6 connectivity. The eth0 interface has a public IPv4 and also a public IPv6 /48. From that server I can ping IPv6 addresses OK. On the ...
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vote
0answers
78 views

Routing IPv6-traffic from client via OpenVPN-server

For playing and learning purpose i set up an OpenVPN-server. Im currently attached to a network without IPv6. Because of that, I would like to route all IPv6-traffic via the VPN. With IPv4 and ...
1
vote
1answer
153 views

Are there Windows services which only run on IPv6?

This network has about 30 Windows-10 computers and all DNS, DHCP, Active Directory, etc. services are provided by Windows 2012 R2. Are there any native services; be it critical, optional, useless, or ...
3
votes
1answer
127 views

Logstash - Graph IPv4 vs IPv6

I'm looking at starting to graph inbound connections to our various services (web, mail, dns etc) by IP version, ie IPv4 connections versus IPv6 connections. Currently the IPs are being stored in a ...
1
vote
1answer
580 views

Mikrotik: how to properly setup IPV6 routing/dhcp server

I have the following configuration in my network: ISP Router <- eth1 -> Mikrotik Router <- eth2-5 -> Internal network My ISP router receives a /64 IPV6 block that is dynamic, changing ...
0
votes
0answers
30 views

Multiple IP's on the same bridge

I'm setting up a Ubuntu host machine for a couple of kvm virtual machines. Here is my interface config file: # config block 0 auto lo vmbr0 iface lo inet loopback iface vmbr0 inet static address ...
0
votes
0answers
76 views

IPv6 routing in Routing & Remote Access Services VPN

I am trying to configure IPv6 IP Pool on Microsoft RRAS VPN Server the RRAS server is assigning the IPv6 IP Address to the remote access clients but when I test the IPv6 address assignment from ...
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votes
0answers
56 views

Permission denied on mount via ipv6

There is a ubuntu machine with these addresses root@soup:/# ifconfig eth1 eth1 Link encap:Ethernet HWaddr 08:00:27:09:90:1c inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0 ...
0
votes
0answers
82 views

My server doesn't respond to ping6

I'm trying to enable ipv6 on my webserver. The server runs FreeBSD 10 and I'd like to enable ipv6 access to my websites. That's the long term goal. The goal here would be at least to have a server ...
0
votes
0answers
52 views

Configure ipv6 to ipv4 tunnelbroker under linux

I'm running arch linux, with a ipv4 only ISP. I want to test how good my servers work with ipv6, especially my websites. So I set up an account at tunnelbroker.net (hurricane electric) and created a ...
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votes
0answers
18 views

Mapping or conversion between ULA and link-local addresses in IPv6

Is it possible to deterministically jump (convert) from ULA to link-local addresses on a IPv6 network.
2
votes
1answer
77 views

ProFTPD IP masquerade just some ways

I am trying to setup a FTP server using ProFTPD on Xubuntu 15.10. Users will connect to this server in two ways: internally (using an internal IPv4 address) externally (using domain name pointed to ...
2
votes
0answers
115 views

Limit odhcpd SLAAC / RA to specific MAC addresses

I am trying to set up my OpenWRT powered router to give me IPv6 connectivity via tunnelbroker.net (he.net). I am using OpenWrt Chaos Calmer 15.05-rc2. Creating the tunnel works fine, but I'd like to ...
1
vote
0answers
146 views

ssh connection very slow and delayed [duplicate]

I have recently created and configured an ubuntu server 14.04.3 with the help of the ubuntu-core tools. Networking with IPv4 and IPv6 works fine for me with different clients. But a few days ago, i ...
0
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1answer
354 views

IPv6 Neighbor Discovery/Routing Failing for Kernel 3.10

Stupid mistakes led to all of this, read Update 5 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 ...
0
votes
0answers
20 views

How to connect internal IPv6 to IPv4 network

For the past few days Im having "fun" checking different NAT configuration options on srx240. Im looking for a way to enable lab PC connection to internet. Is it possible with this spec, or do I have ...
3
votes
0answers
223 views

IPv6 only server PXE provisioning

We are currently preparing for IPv6 only network deployment and struggle to find a unique server identification. In our previous setup, we used mac address as servers primary identification. We were ...
3
votes
3answers
5k views

sendmail can not deliver to gmail - IPv6 sending guidelines regarding PTR records not met

I am having trouble in delivering mail to google from a fresh sendmail install on ubuntu 14.04. The DNS-records seem to be fine for the ip. Something else must be wrong. Sending mail from command ...
0
votes
2answers
128 views

Using IPV6 with Dante

I have a server with one ipv4 ip and plenty of ipv6 ips. i would like to setup Dante to work as a socks proxy server in my server. I need to assign different port to each ipv6 port. Now i can use ...
1
vote
3answers
780 views

Debian 8 resolv.conf overwritten by IPv6 autoconfiguration/DHCP when DHCP disabled

I have recently installed Debian 8 on a network with IPv6 DHCP Enabled. /etc/resolv.conf is being overwritten by the IPv6 DHCP entires continually despite the fact that all IPv6 DHCP is disabled, ...