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

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74 views

OpenWRT router as a switch with DNS

We have a router (8 ports) that serves our church (it also is our modem with ADSL2 etc) and handles our DHCP services. I've needed to extend our network to accomodate another 2 ports, so an extra ...
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1answer
38 views

Domain has disappeared, but Route 53 and UptimeRobot report it is still fine

I registered a domain with 123-reg.co.uk. It sat there for 2 months and then around the 20th of October I transferred it over to Route 53. I am in the UK btw. The domain arrived at Route 53 on the ...
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2answers
66 views

Name Server with Multiple IPs

We have multiple internet connections attached to my company's network, from different providers, and there are authoritative name servers on the network as well, also with an IP from each of those ...
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1answer
93 views

Too many DNS zones. Need advice on what to do about them

So we have someone here who loves creating DNS zones. So much so that we now have 145 different zones. 80 of these have one A record each. It has gotten to the point where we can't find anything ...
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0answers
31 views

Issue getting DNS wild card A Record (*) working

I have a sub domain named subdomain under main domain named maindomain. Inside subdomain i have wild card (*) A Record that maps to a particular IP Address. This works fine and when i say ping ...
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1answer
60 views

BSOD on windows server 2008 R2 reason Srv2.sys Driver_IRQL_not_Less_or_Equal [closed]

I have a issue that i have been facing with my windows server 2008 R2 (ADC Server) Additional Domain Controller (Roles Installed AD,DNS). It suddenly gives a BSOD i did analyse the dump and found out ...
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1answer
30 views

Channelizing logs on Bind 8

I am using the following channel clause in my named.conf, logging { channel named_log { file "logs-remote/bind.log"; severity dynamic; print-category yes; print-severity yes; print-time yes; }; ...
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0answers
40 views

Cannot connect via RDP/SMB via DNS?

We have a SBS (Windows Small Business Server) running DHCP and DNS. One of our VMs is a test VM. Due to security reasons, this VM is not inside the Domain and has no access to network drives etc. ...
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1answer
35 views

Unable to point CNAME of subdomain of my website to it's tumblr blog in plesk [closed]

I created a tumblr blog for my website. And I want to host it on blog.mywebsite.com subdomain. Tumblr says that I should add CNAME instead of A Records to domains.tumblr.com. But the problem is that ...
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0answers
37 views

new dkim config -> opendkim-testkey: record not found

I am trying to set up dkim and I cannot get it to work or test properly, and I get the following error: opendkim-testkey -vvvv -d domain.com -s default opendkim-testkey: checking key ...
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1answer
618 views

Yum PYCURL ERROR 6 - “Couldn't resolve host 'mirrorlist.centos.org'” [closed]

I am attempting to redo my server (CentOS release 6.6 [Final] x86_64) and I am now getting the following output on yum [root@server ~]# yum update Loaded plugins: fastestmirror, priorities, security ...
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2answers
22 views

How can I redirect requests for a site in IIS to a different external server?

I am about to move my website away from IIS to a Linux VPS. Part of this involves updating zone records. There will be some time from when I change my zone records to when they are propagated to ...
3
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1answer
73 views

What's the proper way to setup a domain name to not accept email?

RFC 5321 sec. 5 states that: SMTP clients must look up for an MX record; if no MX record for domain is present, look up for an A Resource Record (RR), and if such record is present, treat it as an ...
32
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10answers
4k views

Run antivirus software on linux DNS servers. Does it make sense?

During a recent audit we were requested to install antivirus software on our DNS servers that are running linux (bind9). The servers were not compromised during the penetration testing but this was ...
0
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1answer
47 views

Reviewing source of DNS requests

Is there a way to know the source of DNS requests which were handed to the Forwarder (requests which were handled by the DC are of no interest)? If I set up a BIND server which is a forwarder to the ...
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1answer
19 views

MS Exchange 2003 to Google Apps Migration Domain Verification

My company just decided to move to Google Apps due to lots of technical issues with our Exchange 2003 server. I have just signed up for the free trial account for Google Apps and one of the first ...
2
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2answers
1k views

Docker containers can't resolve DNS on Ubuntu 14.04 Desktop Host

I'm running into a problem with my Docker containers on Ubuntu 14.04 LTS. Docker worked fine for two days, and then suddenly I lost all network connectivity inside my containers. The error output ...
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0answers
42 views

Events ID 4013 For DNS and 1844 for Active Directory

I have newly registered a virtual private server (windows 2008 R2). My problem is when i install an Active Directory and DNS Roles, it raises events 4013 for DNS and 1844 for Active Directory. What ...
2
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1answer
102 views

Openvpn server with bind9 DNS on AWS. Linux client cannot resolve host names.

I have a openvpn server set up and working on an AWS debian instance. It works as should but I want to push DNS queries to linux clients from bind9 which is on the same server as openvpn. All seems to ...
1
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1answer
55 views

Domain controller not appearing in DNS on any server but itself?

I have a site with a DC I want to decommission, and a relatively new one (promo'd within the last two weeks). I'm having trouble demoting the old server, and in the process of trying to figure out ...
8
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2answers
516 views

Domain computer cannot resolve internal hostnames, but nslookup can

I have a Windows 7 computer on my domain that is behaving oddly. It is possible to ping www.google.com It can ping internal hosts using their IP address It can ping the local Domain Controller/DNS ...
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1answer
97 views

Access libvirt+KVM virtual machines with DNS

I have an Ubuntu Trusty machine running KVM + Libvirt to manage small virtual machines, and using the standard NetworkManager to connect to regular networks. I want to be able to access the virtual ...
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1answer
32 views

Adding a zone from a file via dnscmd - Microsoft DNS

I am trying to add a file backed zone on microsoft dns via dnscmd. I have a zone file in c drive, c:\Windows\zones\test.com.dns Upon entering the command, dnscmd /zoneadd test.com /primary /file ...
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1answer
22 views

After name server change, DNS queries on and off

I migrated the domain www.pantego.com to a different name server. We were using the Enom registrar and their default name servers, but I migrated them to AWS Route 53. I know all records were copied ...
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1answer
29 views

Service/Port based DNS redirection? or variant [closed]

resolving a domain to a different IP based on port/service ex, mineplex.com redirects to one IP always when using a web client. But will redirect you to another IP when using a minecraft client. ...
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1answer
31 views

What should an s3 end point look like when configuring an ALIAS record in Route53?

I'm trying to point my root domain to an s3 bucket that redirects to www.mywebsite.com. However, when I try to configure my ALIAS record to point an s3 endpoint, the only endpoint that the dialogue ...
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1answer
40 views

Would it be good idea to share DNS zone files via NFS?

Any expert advice on Bind DNS zone file transfer (master->slave) via NFS? Are there any drawbacks for not using Bind's zone transfer feature? Thanks a lot!
4
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2answers
188 views

Scale HAProxy for more than 64k websockets

We are trying to design an architecture that will be able to handle more than 64k websockets. We first tried with Amazon ELB, but its design doesn't allow unexpected spike of traffic nor websocket. ...
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0answers
39 views

Oracle GNS (Grid Naming Service) Breaks DNS

Am running a 2-node Oracle 12.1.0.2.0 ASM Flex Cluster using Oracle GNS which I believe uses zeroconf to create it's adhoc network. Before GNS starts, DNS works, i.e. nslookup, dig, ping, ssh all ...
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0answers
21 views

'550 relay not permitted' problem with MDaemon [closed]

Not being a pro webmaster I have problems with company mail server. We do have a web-site virtually hosted. We also have an MDaemon in our office as a internal mail server that sends emails out as ...
0
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1answer
156 views

DNS or Virtual host issue to open abc.com and www.abc.com

I'm facing issue with Linux VPS. Whenever I'm clicking xyz.com, it is working fine. Whenever I'm trying to click www.xyz.com, it is opening firstly configured website on virtual host. I configured ...
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2answers
43 views

why online tools can not find my MX record? [closed]

i have these dns records on my server xxx.com MX 10 mail.xxx.com. mail.xxx.com A 192.168.xx.xx i can send and receve email but when i test my dns with online tools i ...
4
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1answer
256 views

Any semblance of originally-requested domain name in HTTP, post DNS-resolution?

My understanding of how DNS resolution and web browsers work is as follows: Your browser uses the DNS system that ultimately connects it to your registrars name servers Your registrar's name servers ...
1
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1answer
56 views

How to edit domain's nameservers when no service “takes responsibility”?

I think I may have made a mistake when migrating my DreamHost registered domain to Amazon's Route 53 service. I didn't modify the DNS settings on DreamHost's end during the migration. So now, my ...
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0answers
31 views

Proxy all requests to domain.tld

Here's the situation: I want to direct all requests to to a proxy server. One idea I had was to force the DNS server to respond to the request for domain.tld to the server running the proxy server ...
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2answers
62 views

Parent zone does not provide glue for nameservers

We have two domains: gignouser.com clouds.host we have created two A records: ns1.eu.clouds.host ns2.eu.clouds.host Both of these servers host the DNS for both domains, and are listed a ...
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3answers
599 views

How to flush DNS resolver cache on Linux (and FreeBSD)

I am admin for several Linux and FreeBSD servers and here is a problem I have: The servers run a tool that does a lot of DNS queries every minute for the entire network. When it does a query, the ...
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3answers
62 views

Forward the root domain to the www subdomain using DNS records

I have www.mydomain.com pointed at an Azure Website. www.mydomain.com --- CNAME --- mydomain.azurewebsites.net When I visit www.mydomain.com, everything works fine. This is good. Problem is, ...
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1answer
25 views

which domain do I setup DKIM on?

I'm trying to set up DKIN on for my organizations bulk mailing operation. Our bulk mailer is on one domain, test-news.org but all our mailings have user@test.org on the from line. I'm confused as to ...
0
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1answer
36 views

Curl to self using fully qualified address

I'm running a Virtual Private Server to host some websites. I have a PHP script that tries to fetch resources from the server, essentially using a curl command to the server ...
3
votes
2answers
79 views

Need to understand : ping

I am using ubuntu 13.10 and I have used ping before to check server is up/down. Can someone help me understand, as I'm unable to find anything explaining this I did the usual ping command ping ...
0
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1answer
138 views

Centos 7 with SElinux: openvpn and DNS

I'm trying to use openvpn as client on centos 7. It works fine, but i cannot get DNS from server. As you know, there is no resolvconf in new Centos, so, standard update-resolv-conf script doesn't ...
1
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1answer
30 views

DNS Zones: criteria to create new zone delegations

If I'm not wrong, within a domain name a company owns, their administrators have complete freedom to create as many cuts (zone delegations) inside the domain tree as he wants, but, inside his own ...
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1answer
35 views

How does a resolver know a DNS response is authoritative?

The title says everything about me question. How does a resolver know the response comes from an authoritative name server? An equivalent question: what flag or field is marked by a name server to say ...
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0answers
32 views

Windows Server 2008 consuming a lot of bandwidth

My Windows Server 2008 has been consuming A LOT of bandwidth in the last days (990 GB). This is a development server so it should not consume more than 100mb aprox. We noticed this after the server ...
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2answers
44 views

Two Servers one Domain - What about DNS? [closed]

I have a website mywebsite.com/forum If you type mywebsite.com in your browser, you will be redirected to mywebsite.com/forum through a script. Now, I want to have a blog on the main page ...
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0answers
24 views

Websites Appearing on Server but not rest of Network

We have a setup in which IIS is working properly if remoted into the server. On the actual sever, it is working with both with ip addresses and dns. If, however, I am on a client machine on the same ...
1
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1answer
48 views

Spoofing DNS for another domain within a DMZ

I am setting up a DMZ disconnected from our corporate LAN. I've moved DNS services for the DMZ hosts into the DMZ with a stripped down set of zone info containing only what the DMZ hosts need to know. ...
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votes
2answers
103 views

Bind only works Locally - Ping works locally not externally

I am using Bind on a Centos 6.5 server in order resolve subdomains to an IP. I have *.ddns.example.com and ddns.example.com pointing to my server via A record. I have added a zone for this, see ...
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0answers
59 views

KMS for Office 2013 defaults to old server - DNS is fine

I have a strange problem with a Server 2012 R2 KMS Server which has been migrated from a 2008 R2 Server - and by migrated I mean removed, and followed all instructions found here: ...