DNS stands for the Domain Name System, a hierarchical, distributed database where the keys are domain names.

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6
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178 views

“The zone can be scavenged after” keeps incrementing

What are you trying to do? I'm trying to enable DNS scavenging on a DNS zone that has about a hundred stale DNS records. What have you tried in order to make it happen? I setup DNS Scavenging per ...
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51 views

Big Trouble with (I think) Outlook X500 addressing

I moved a small client from one hosted Exchange server (Microsoft Office 365) to another (Intermedia.net). Some emails from External senders to the users on the new server host are undeliverable, ...
3
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61 views

Does AWS Elastic Beanstalk Swap Environment Url swaps environments for git push?

I have read the docs for zero downtime on aws but cant seem to understand what happens in this scenario? I have a environment running in production called 'red' I duplicate the environment as 'blue' ...
3
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361 views

Branch office & DNS

We've got a branch office with no on-site services at the moment and we'd like to change that. The biggest goal is to setup some file servers but faster log ons and DNS resolutions will be welcome as ...
2
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33 views

how to prevent loadbalancer from going offline?

i plan to setup a load balancer for a webproject but there is a major issue in my head: a typical loadbalancer would be: (provided by nginx upstream) Server #1 accepts all requests and forwards them ...
2
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81 views

DNS Slave Unresponsive When Master Is Unavailable

I spent several months setting up what I thought was an efficient and best-practice configuration for our organization's DNS infrastructure. DNS1 - master server hosting internal zone files and ...
2
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196 views

Network Layer 7 Deep Packet Inspection linux solution that isn't a all-in-one distro?

Overview: I have software that has our Edge/DNS servers hardcoded into them, DNS queries returned from DNS servers are not being masked properly. I need the DNS entries that are returned from BIND ...
2
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124 views

can't access sub-subdomain: DNS_PROBE_FINISHED_NXDOMAIN

I can't access to sub-subdomains. For example http://electricien.synerciel.fr is working. But, for sub-subdomains http://electricite-lemonnier.electricien.synerciel.fr/ returns ...
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91 views

DNS Boot Method throuth dnscmd

Through the command line on Windows Server 2008 R2, dnscmd SERVER /Config BootMethod … the source from which the DNS server gets its configuration information (is determined) [→ ...
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37 views

Managing multiple equal zones with DNSSEC

I run an authoritative name server (BIND), and I have a few dozens domain with identical zone files, i.e. they all use /etc/bind/db.default3. I’m considering deploying DNSSEC on my server, but so far ...
2
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250 views

Windows Server 2008 DNS Server Down

On a Windows Server 2008 machine while trying to start the DNS Management window DNSMGMT.MSC fails with the error: "The server <Server Name> could not be contacted." “Access is denied. Would ...
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121 views

Debian server - DNS stopped working after static IP reassignment

Due to changes in the LAN router, I had to modify the static IP of one of our servers. It still succeeds in finding the external world (ping google.com), but only temporarily - when I access one of ...
2
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157 views

How can I use a Linux BIND DNS server for my Active Directory forest?

I am trying to setup an Active Directory forest that uses a Linux BIND server for DNS. The goal is that the Domain Controller (DC) to be able to make entries in the /etc/bind/db.foresta.net file from ...
2
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42 views

Failover web hosting with multiple NS

Are there any drawbacks in having each nameserver entry in a domain name point to different failover server? In this setup, the same DNS server will also serve the content - so if it's down, the ...
2
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0answers
1k views

EC2 DNS not resolving hostname to internal IP

I already posted this on the AWS forums without success (https://forums.aws.amazon.com/message.jspa?messageID=502441). I'm wondering if I'll be more lucky here. We have an internal DNS setup that ...
2
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165 views

Is it possible to configure a CDN so that it will step out of the way for a subset of regional IPs?

We have a website which targets customers in China, both expat and local Chinese. We have an ICP license which allows us to host in a datacenter inside China. Internet in China is actually as fast as ...
2
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636 views

How to config libvirt network setting about disabling dnsmasq “except-interface=lo”?

Here is the thing. My VMs run with libvirt and use default network libvirt-provide, and I've mad each VM registers its hostname to dnsmasq set by libvirt. so I want to look up its hostname for ...
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236 views

Performance impact hijacking A records within RPZ on BIND?

Has anyone who has implemented RPZ within BIND on a large scale (i.e. query load at least ~1000 QPS per server) had an opportunity to measure the performance impact of RPZ within an A-record only ...
2
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162 views

Windows DNS - redirect all external requests for same ip

I'm trying to setup a Windows 2008 DNS Server to redirect all requests for the same IP. For example, if I enter in ANY domain (.com / .net / .org / .us / .uk / ...) I want to redirect the request for ...
2
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125 views

Adding a 2008 server to a 2003 Domain with DNS devolution?

I'm running into a problem adding a 2008 server to our existing 2003 domain, and as I am not a Windows admin, I'm not getting the problem here. Some reading around on Technet seems to indicate that ...
2
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406 views

Bind 9.3 cache-only mode with authoritative name server

I have bind 9.3 up and running which is designed as a cache-only to get queries from other resources and then cache them to serve clients internally, now I setup my own zone because this is also a web ...
2
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14k views

How to properly configure BIND forward zone for an internal DNS server?

I have: internal DNS server ns1.internal with IP 192.168.0.4. external DNS server with an external TLD mydns.example.com and internal IP 192.168.0.5. It's accessible both from the Internet and from ...
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101 views

Is there any way to make the Bucktooth gopher server use an OpenNIC address?

Is there any way to make the Bucktooth gopher server use an OpenNIC address? I don't think there is, but anybody who would like to try is welcome to do so.
2
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415 views

Ubuntu SOCKS proxy setup with two interfaces - how to pass DNS

I setup a SOCKSv5 server (Dante) on Ubuntu with two ethernet interfaces: eth0 is connected to my WAN with a static routable IP eth1 is connected to my LAN with a private IP I have a client ...
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16 views

504 gateway timeout when accessing by hostname, but not by IP

I'm using Amazon EC2 with Elastic Load Balancing. On my web-based application, end-users connect to app.myapp.com get a 504 gateway timeout error when performing certain operations like converting a ...
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28 views

Prevent postfix appending search domain

I have postfix running on OpenBSD, and I'm having trouble with it appending a search domain when none is configured in either postfix or the local DNS server (dnsmasq). My domain has a wildcard CNAME ...
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41 views

APIPA Address Showing for DNS & WINS Server 2012 r2

Background I just finished setting up a Server 2012 r2 install. It is the only server in the forest and I am only utilizing 1 NIC (it has two, but the second is disabled). It is the DC and handles ...
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45 views

Why does RFC 2181 disallow MX record with a CNAME exchange?

According to RFC 2181 http://tools.ietf.org/html/rfc2181#section-10.3 10.3. MX and NS records The domain name used as the value of a NS resource record, or part of the value of a MX ...
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38 views

How can I solve DNS delay on iOS over VPN

When connecting iOS devices to our Sonicwall VPN (L2TP) it takes about 30 seconds before any internal servers can be contacted. It appears to be purely a DNS problem because they can be contacted via ...
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77 views

How can I force dnscmd.exe to provide its output in English?

How can I force dnscmd.exe to provide its output in English? I have automation that parses the output of various dnscmd commands, such as dnscmd /info > dnsInfo.txt. I'm using PowerShell to ...
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63 views

Server 2012 DNS keeps adding a forwarder on it's own

I'm having a weird problem that must be something simple I'm overlooking. Deployed a new Server 2012 PDC to replace a SBS2011 DC. I had it inherit the DNS before decommissioning the old one. Single ...
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699 views

Force Windows DHCP to Update DNS for All Current Leases

Is there are way to force Windows 2008R2 DHCP Server to update all DNS entries for all current leases? (Guess the server-side equivalent of ipconfig /registerdns) We had a configuration issue with ...
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74 views

DNS does not route properly to WAN NIC when dnscrypt is used

I have a Windows 2003 server with AD integrated DNS. I'm trying to configure the server to make outgoing (forwarded) DNS requests through dnscrypt proxy instead of through the normal TCP/UDP 53. I ...
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42 views

How to send dynamic update to DNS Server using Avahi?

I am using beaglebone running avahi-daemon and I have configure it to respond mdns query with local name “myboard.local” when accessed from PC on same network. It works fine. But, how can I ...
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500 views

ISPConfig multi-server DNS setup

I have 2 servers with ISPConfig 3 installed. Both servers are used to all services (hosting, db, mail, dns etc). One of the servers is also configured to be ns1.mydomain.com and the secondary is ...
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100 views

Windows 2012 Master & Ubuntu Bind 9 Slave & SOA

I'm kinda like the maid... I don't do Windows. But thanks to new things we're implementing, I'm now attempting replicating a single zone from our AD cluster. We had this working just fine but ...
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86 views

Some emails don't arrive

Yesterday, somehow a DNS Zone File got removed from Cloudflare. So after re-editing the file everything seemed okay. Now there's the problem that some emails don't arrive in the inbox. Strange thing ...
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57 views

DNS Registration Using Non Windows DHCP

We are searching for a solution for our VPN users. We use a Fortinet SSLVPN. The Fortinet appliance issues DHCP to our clients. It is configured to have the clients use our internal Windows DNS ...
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34 views

Multiple XenDesktop 4 environments - dns confusion

I have 2 HP proliant blade servers in an hp c3000 enclosure, EACH has xenserver 6.2 sp1 installed, a number of XP machines, one win2k3-r2 as a domain controller and another win2k3 as a xendesktop 4 ...
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202 views

Dreamhost DNS to AWS Route 53

I'm looking to setup DNS failover for config.webconverger.com and I think Route53 is the best option to get it going. However I'm confused how to export the DNS zone from Dreamhost to Route 53, ...
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35 views

Windows Dynamic DNS Update Sequence

I'm trying to get the Windows DDNS update sequence straight in my head. Here's what I think happens: Windows Client == DHCP Discover Windows DHCP Server == DHCP Offer Windows ...
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57 views

DNS Timestamps don't appear to be updating since enabling Secure Only Updates

We have a Windows Server 2008 R2 Active Directory Domain. There are 4 domain controllers each running DNS with a Active Directory-Integrated zone. There are 2 member servers running DHCP with Name ...
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174 views

Redirecting a domain in cPnael Results in /cgi-sys/defaultwebpage.cgi

I'm not sure if this is the right place to ask it or if it should be over on StackExchange, feel free to redirect me! I had a domain www.sample.co.uk (primary) & .com (forward) My client has ...
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49 views

How to make BIND return old cached enties if all forwarders are failed?

I have a local forwarding BIND server installed at localhost. In its configuration there is a couple of forwarders: options { ... forwarders { 1.2.3.4; 5.6.7.8; }; ... }; Servers which are pointed ...
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425 views

Azure Point-to-Site VPN but no DNS

I've got: an Azure Virtual Network, an Windows Server 2012 Domain Controller on that network, a Point-to-Site VPN set up for that network all the way so that I can connect to it from my local ...
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40 views

Reply a default ip from dns server when network is disconnected

I'm using Bind9(9.9.3) as domain name server, and using "redirect" type to return an ip when resolving a non-existence domain name. But it fails when the internet connection is down. Is there a way ...
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147 views

Trouble with name resolution when using programs like `gem` in shell

I have trouble with name resolution when using programs like gem in my shell within my office environment. Whenever a program needs to connect to a remote host, it fails to resolve the domain name, ...
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234 views

Replication issue caused by bad DNS entry in _msdcs

We have 3 DCs in our domain. One of the DCs died (wouldn't boot) two weeks ago. We performed metadata cleanup to remove the old DC from AD. Then we built a new DC with a new name (we used the same IP ...
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108 views

Internal-only DNS Master and Slave Servers on Linux (No Internet) - Recursion?

Using two physical Linux servers on different sub-nets, I'd like to have master and slave DNS servers. These DNS servers will only resolve internal names and addresses. Neither the DNS servers nor ...
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62 views

Multiple DNS mappings for a host via DDNS

I have a network in which DNS is automatically updated with a record for hosts when they get an address via DHCP (isc-dhcp-server & Bind configured with DDNS updates). The DHCP server is ...