6
votes
3answers
628 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
62 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 ...
1
vote
1answer
42 views

Running authoritive nameserver in ipv6 only environment?

What are the arguments against running an authoritive nameserver (primary) e.g. bind in a ipv6 only environment? In the current setup the machine dedicated to the nameserver has only direct ipv6 ...
1
vote
2answers
216 views

Can I configure a DNS cache not to forward AAAA queries?

I'm setting up an internal DNS cache because my firewall is having trouble handling all the sessions created by DNS requests. I tried using bind9, dnsmasq and DJB dnscache, they all help reduce the ...
9
votes
3answers
1k views

How to prevent delays associated with IPv6 AAAA records?

Our Windows servers are registering IPv6 AAAA records with our Windows DNS servers. However, we don't have IPv6 routing enabled on our network, so this frequently causes stall behaviours. Microsoft ...
1
vote
2answers
1k views

IPv6 on Server 2008R2 kills DNS resolution? Internet slowdowns?

I have been having intermittent Internet slowness for some time. It has been really challenging to me, and I have tried so many things. I replaced the modem, tried 3 routers, replaced a smart switch ...
0
votes
1answer
77 views

SSH Recursive AAAA lookup

Given a server "example.com" at 10.0.0.1,[ipv6] with a CNAME *.example.com > example.com And a second server "staging.example.com" at 10.0.0.2/[ipv6] if staging tries to SSH to "example2.com" (with ...
2
votes
1answer
168 views

Ping and traceroute can resolve my IP, but real clients (Apache, Adium, ssh) cannot

I have set up my DNS with afraid.org. I have an A record ssh.strugee.net pointing towards 71.32.87.80. I do not have any AAAA records set up. When I run ping ssh.strugee.net or traceroute ...
5
votes
2answers
307 views

Linux: Block IPv6 for certain applications / hostnames

Problem and aim We don't get IPv6 from our ISP thus I have an IPv6 tunnel which works fine but is, of course, not very fast. And not really reliable. I like to have IPv6 available "just in case" but ...
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. ...
1
vote
1answer
575 views

Windows Server 2012 DNS: default forwarders disables root hints

I've set up a test domain to experiment with windows server 2012. Initially I kept my test machines on a isolated network, but today I installed a pfsense machine to route some traffic to the ...
3
votes
1answer
72 views

How do providers plan to deal with rDNS for client /64 IPv6 blocks when assigned?

The standard block assigned to a home will be a /64 block to enable autoconfigure. This means the traditional reverse DNS mapping of host-237.miami.ispname.com is not only practical, it's improbable ...
0
votes
2answers
96 views

IPv6 reverse not resolving for Linux shell “last” and “who”

IPv6 is properly resolving in DNS: > host 2607:fa18:0:2::17 7.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.0.0.0.0.0.8.1.a.f.7.0.6.2.ip6.arpa \ domain name pointer sine.xmission.com. However, the ...
3
votes
1answer
707 views

Disable AAAA lookups in Ubuntu Linux

We have a step during in of our large map reduce that does DNS resolutions. The application itself uses the c-ares library as well as libcurl. I notice that with each resolution, there is first an ...
0
votes
1answer
234 views

Is there a drawback to both A and AAAA records in the ADDITIONAL section?

I'm just asking for a possibility of having both ipv4 and ipv6 configurations in one domain. If I do dig <domain>, inside the ADDITIONAL SECTIONS will display the A and AAAA records. Are there ...
1
vote
1answer
654 views

Sendmail issue with IPv6

I have an email server configured with multiple-instance of sendmail running each on different IPv4 and IPv6 addresses. Everything is running smooth until a point where for some domains/emails ...
11
votes
2answers
417 views

Why is my domain controller causing my router to send advertisements for Unique Local Addresses?

I'm currently evaluating Server 2012 to serve as a domain controller in a small heterogeneous network of Linux and Windows workstations and servers, all of which would eventually be joined to the ...
2
votes
1answer
80 views

PDC giving empty DNS responses to a Mac in the network

I have a small network with two computers (Windows XP), a Mac (OS X 10.6), a printer (Konica Minolta C250) and a server (Windows Server 2008 Standard SP2 x64). Lately, after configuring a shared ...
1
vote
1answer
483 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 ...
5
votes
1answer
108 views

Running multiple services on different servers with IPv6 and a FQDN

One of the things NAT has permitted us to do in the past decade is split physical services onto different servers whilst hiding behind a single interface. For example, I have example.com behind a NAT ...
2
votes
1answer
156 views

NDP + DHCPv6 (DNS) how to?

How to combine, get prefix ipv6 through the NDP and getting dns through dhcpv6? example: interface FastEthernet1/0 no ip address duplex auto speed auto ipv6 address 2000::/64 eui-64 ipv6 nd ...
4
votes
2answers
668 views

How to enable IPv6 glue records (AAAA) in PowerDNS

I'm running a PowerDNS 3.1 on a Debian Wheezy Beta 4 system. The zone data is accessed through a PostgreSQL database, the server answers to both IPv4 and IPv6 queries. If the DNS-Server knows the A ...
1
vote
1answer
100 views

Best practices for IPv4/IPv6 hosts in DNS zones?

I've got a VPS with IPv4 and IPv6 addresses, and I'd like to use them both for my website and other services I might use. I've added a "www" register both with "A" and "AAAA", and I've done the same ...
1
vote
1answer
69 views

IPV6 - using tunnel broker / dns to provide ipv4 compatibility

I've a tunnel broker from he.net associate with a IPV6 /64 subnet As a newby to ipv6, i've just discovered that its not reliable to only set a subdomain to a AAAA entry : because most of ISP will not ...
1
vote
1answer
364 views

IPv6 DNS Lookup

I am trying to prevent a webserver to do IPv6 lookups (AAAA) to the DNS-server. The webserver has no IPv6 addresses set-up on the interfaces. Disabling IPv6 in sysctl.conf had no impact either, the ...
2
votes
3answers
859 views

ipv6 reverse DNS delegation

I currently have 2001:1973:2303::/48 assigned to me and i'll be assigning /64's to customer's I'd like to have 1 zonefile for the /48 where i can essentially point / redirect query to different ...
4
votes
2answers
274 views

Assigning multiple IPv6 addresses on a Server

Let me uncover my intent. My host provides hundreds of IPV6 addresses free, but charge for an IPV4 address. I have several sites under one server and I was wondering if I can give each site/domain ...
2
votes
1answer
271 views

DNS resolver prefers IPv6 CNAME in search list over IPv4 response

One of my my domains (lets say hackedd.nl) has a catch-all CNAME record pointing to hackedd.nl, which has both A and AAAA records. This all seems to work fine. However, if the /etc/resolv.conf file ...
4
votes
2answers
181 views

Can you use IP V6 for name server records

This might sound like a stupid question as I have a very basic grasp of DNS management, but I'm looking for a new VPS and most providers only offer one IPV4 address, which doesn't validate on ...
1
vote
1answer
1k views

Does Windows Azure present an IPv6 address?

When using http://cloudflare.ipv6-test.com/validate.php to see if my website if IPv6 compliant, I see that it is not because it requires an AAAA DNS record. My site is hosted on Azure, but I can't ...
1
vote
3answers
948 views

SLAAC and DNS, no really - what's the deal?

So I know that there are extensions to SLAAC in the works to enable DNS discovery via RAs (RFC 6106). But what was the original intent? How did the IPv6 designers envision things working without ...
1
vote
1answer
288 views

Windows server trying to use IPv6 despite being turned off

I have a server which needs to communicate with another server (both win 2k8r2). One of them recently had an IP address change, and I suspect that the IPv6 address that the AD DNS server holds is now ...
0
votes
2answers
518 views

Internet Explorer and IPv6

I can't seem to stop the IPv6 address being registered by our server. Does anyone know how? This is causing slow browsing issues when browsing to spiceworks server using Internet Explorer. The ...
2
votes
1answer
452 views

IPV6 Bind/DNS DHCP

We are run the one event in that there 7000 people are visiting, with Laptop to provide then internet access. We thought of setting up IPV6 DNS/DHCP all this people will be use LAN cable to get ...
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 ...
2
votes
1answer
129 views

DNS servers via RA in IPv6

Some time ago, RFC 6106 was created, which states how a router tells the clients about the DNS server to be used. It is a new standard, it has to be implemented, which needs time etc. I'm courious ...
0
votes
1answer
511 views

Vyatta 6.2 IPv6 DNS handout

I have a Vyatta server which I have connected to Hurricane Electric. I have setup the RADVD on the box and my LAN clients get a public global IPv6 address and route through the Vyatta box. Where do I ...
6
votes
1answer
2k views

Multicast hostname lookups on OSX

I have a problem with hostname lookups on my OSX computer. According to Apple's HK3473 document it says for v10.6: Host names that contain only one label in addition to local, for example ...
4
votes
1answer
585 views

Can I selectively register IPv6 addresses in DNS with windows dns auto-update?

We operate in a two-address model for our production ipv6 network -- we have an internal site-to-site vpn-connected ULA range in fd00::/8, we also have IPv6 external addressing in 2001::/16. We ...
0
votes
1answer
189 views

pdnsd with IPv6 host - “Could not discover udp destination address”

I'm starting to play around with IPv6 and am trying to work within the constraints of an existing platform and set of services. Right now I'm trying to get DNS working over IPv6 using pdnsd. From my ...
4
votes
3answers
10k views

Does Windows try to look for IPv6 AAAA records even when it does not have a routable IPv6 address?

My network router is a ZyXEL ZyWall USG 100, which has a built in DNS server. Many Windows computers connect to it and get IPv4 addresses via DHCP. They also are informed of the DNS suffix ...
1
vote
1answer
464 views

BIND9 and IPv6… why doesn't it listen?

OS is Debian sid. BIND 9.7.3. It has no ACLs (except whatever's the not-overridden-in-config-file default), and has "listen-on-v6 { any; };" (as per Debian's default). IPv6 is supported (ssh, smtp, ...
1
vote
3answers
1k views

How to point to my own DNS (IPv6)?

Well, I would like to point to my own DNS, as long as my domain registrar (123-reg.co.uk) does not have support for AAAA records. But if I request to point to my own DNS, they ask me for two NS, ...
12
votes
3answers
12k views

How do I add IPv6 address into System32\drivers\etc\hosts?

There is already by default, and it works (Win 7): ::1 localhost This also works (testing with ping): ::1 hosta But when I'm trying to add something non-loopback, it ...
1
vote
1answer
618 views

Something's up with BIND9…slave zone giving SERVAIL for all queries in domain

I've got a domain set up with bind9 on Debian Lenny acting as a slave to my DNS hosting provider's servers. The exact circumstances are I think irrelevant, but I have allowed transfers out to my ...
1
vote
1answer
164 views

IPv6 (aiccu tunneled) server consistently resolves addresses to its own IPv6 address

I have a Fedora 10 server using an IPv6 tunnel broker (sixxs). One of the nagging things I have noticed is that using any common utilities like "wget" domains resolve to the real IPv4 destination ...
2
votes
1answer
244 views

Empty IPv6 address causes DNS error on Macs running Apache Server

For a site I manage, http://archstl.org/, the DNS entry returns an empty (::) IPv6 address when I run $ host archstl.org in the Terminal. I think the errant IPv6 entry may be the cause of my problem: ...
8
votes
3answers
2k views

What determines whether the FQDN is interpreted as IPv6 or IPv4?

When I type a Fully Qualified Domain Name (FQDN) in my URL bar, the browser connects to some mapping table (where is this table stored? with the service provider?) that determines where the file ...
0
votes
0answers
380 views

Howto rewrite NXDOMAIN into NOERROR if the question was for an AAAA resource-record

When a certain NS gets asked "what's the A of sipfs02.example.com?" it gives back the RR I need. But if I ask first for "the AAAA of sipfs02.example.com", it gives back an NXDOMAIN instead of NOERROR. ...
1
vote
1answer
535 views

IPv6 DHCP and DNS

Here is the scenario. I have W2K3 server as our DNS. I setup IPv6 DHCP6 W2K8 server to allocate PC addresses. Seems to work OK and does update the DNS automatically with the AAAA entries. Problem ...