Tagged Questions

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

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0
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0answers
10 views

Server migration dns doesn't resolve

I have a problem migrating accounts from one server (SERVER_1) to another new (SERVER_2). I have a domain DOMAIN_1 with some NS created on the domain provider (CDmon): ns.DOMAIN_1 pointing to ...
0
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0answers
5 views

Apex ANAME / ALIAS record in Windows Server 2012 R2 DNS Manager

Some DNS hosts offer a way to have an A record that serves an IP address which is determined on-the-fly (or frequently enough via scheduled job) by resolving some other hostname behind the scenes. ...
0
votes
1answer
30 views

How should I configure subdomain MX / DNS entries?

I have domain example.com and its mx properly configured. I have also an A entry intranet.example.com which points to my CMS. What I want is to have emails of the form user@intranet.example.com and I ...
1
vote
2answers
117 views

Detecting duplicate IP address from improperly cloned virtual machines

One of our production servers was "cloned" to make a secondary test environment. The source server is a virtual machine (VMWare vSphere environment) joined to a domain and with a static IP address. ...
0
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0answers
29 views

Local DNS Server [on hold]

I am working on a tool that provides 'global virtual host/VPN' configuration for a LAN. Say I have some domain, mylan.example.com, that points to my router at home. I have a number of machines, alpha, ...
0
votes
1answer
24 views

gpupdate fails, access denied - event ID 1055

I became aware of this issue yesterday after pushing out GPO for Software Policy Restrictions. I am unable to push out MSI installations to certain computers. I went to look at the one of the ...
0
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0answers
11 views

apache Proxy DNS very slow

I have a big data site (wordpress secondry develop) one domain www.example.com. I have stored it into 3 server. In DNS setteing IP address (IN A / AAAA) 46.192.22.01 IP address (IN A / AAAA) ...
2
votes
1answer
34 views

DNS grey listing and long retry intervals - standard practices?

My company's ISP has implemented what I'll term DNS "grey listing" (or they have a configuration problem) - they are blocking inbound DNS queries between [resolver IP, server IP] pairs that haven't ...
1
vote
2answers
38 views

How to limit dynamic DNS updates

First off, I'm sorry if this is vague, but I'm not very familiar with DNS or DNS terminology. What I'm trying to do: I want to limit what hostnames are allowed to dynamically update DNS. I don't ...
-3
votes
0answers
10 views

Multiple Emails From Different Server [on hold]

I've an issue that I hope anybody here could help me. 1.I have a domain that bought from domain registrar. 2.After that, I purchase a web-hosting with email plan from other provider and have been ...
0
votes
0answers
18 views

Registering domain with NIC handle?

Many moons ago I was a system administrator for a small company. I vaguely remember that when I registered domains, they would be using a "handle" which I think was for me "BP897". My previous ...
0
votes
0answers
55 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 ...
0
votes
1answer
33 views

Get a catch-all DNS and set a MX for a special domain

I'm trying to set a catch-all configuration with Bind. I've followed this answer and it works fine : http://serverfault.com/a/397011/179968 Now I'm trying to configure my MX record to configure my ...
2
votes
3answers
73 views

Is the Reverse PTR record fine

I've checked my email headers at http://mxtoolbox.com which says it is ok. But I'm not sure. MY server's FQDN is host.tariffplansindia.com and for my server's IP( 23.239.30.81) the reverse PTR record ...
0
votes
0answers
4 views

wget is unable to resolve host address 80% of the time [migrated]

I have a wget 'http://xxxx.net/somepage.asp?params@abc' in a bash file. When I run it, four out of five times it says: Resolving xxxx.net (xxxx.net)... failed: No address associated with hostname. ...
2
votes
1answer
15 views

bind zone file setup for dns round robin

I would like to set up load balancing for my website using DNS round robin. My DNS is managed by my own CentOS 6 server running bind. I added the following into my zone file: @ ...
-1
votes
0answers
15 views

BIND providing recursion when it shouldn't [on hold]

I have an installation of bind9 running on Ubuntu 12.04.5 LTS. I use this to run split DNS (pointing my internal server names to local IPs rather than external IPs). When I query an internal FQDN ...
0
votes
1answer
29 views

DNS issue “Nameserver cannot be queried for SOA.” - Eurodns registrar

Recently we purchased a few domains ( on EuroDNS, which we have been using for years), to use as sending domains for emails. Our ESP asked us to point them to their NS. All went smooth for .com and ...
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votes
0answers
14 views

BIND forwarders working but not root servers

I took a system with an old version of Fedora on it and bare metal loaded Fedora 20. I used the KDE install option and then added Bind via KPACKAGEKIT. After adding a local zone it could resolve my ...
1
vote
1answer
49 views

Can I Deploy a batch file with Group Policy to run as administrator?

I have created a batch fill which will block Facebook by amending the hosts file in this location: C:\windows\system32\drivers\etc\hosts This is the contents of the file: @echo off echo ...
-2
votes
1answer
27 views

SSL Certificate on CNAME

I have been reviewing the other posts regarding the issue, but having some trouble understanding since I've tried implementing it but still not able to figure it out. I have 2 servers. The main ...
0
votes
0answers
24 views

DNS for unknown website [closed]

i am operating one computer at XYZ university. i would like to get the web page, www.myuni.edu.au neither my PC, nor anybody at XYZ University have ever visited that web site. i want to know how DNS ...
-3
votes
1answer
32 views

DNS configuration for webserver path

What I have is: some vservers and some domains, located at different hosters. A webserver with Port 8081 on one server. I have a path like "123.123.123.123:8081/app/" What I want is: a subdomain ...
2
votes
1answer
54 views

DNS settings on managed switches in LAN

We have a Windows 2008 server that is connected to a managed switch with about 15 Cat5e connections and three fiber branches that go to different parts of campus. At each of these parts there is ...
-2
votes
1answer
32 views

DNS settings on computers and switches [duplicate]

Noob questions. I have static IPs on many of my Windows computers in our Windows 2008 domain. In the network settings at each, I have an a static IP and subnet. The default Gateway is set to our ...
0
votes
0answers
37 views

Internet drops out randomly for short periods of time (LAN issue)

I run a network (I'm just a math teacher) at my school. We get random 10 or so minute periods (I'd guess three a day on average) where the Internet is not accessible from within the LAN. If I go to ...
0
votes
1answer
25 views

Setting DNS TTL for an external address

To start with, I don't know jack about DNS servers. I have been stuck with resolving a problem with a DNS-Server because I discovered a problem with one of our systems and determined that it was ...
1
vote
1answer
42 views

Robust and flexible hosting of DNS A records

I'm currently working on a web platform that will be used to power lots of small websites. All of the websites will be hosted on this platform, on either a dedicated or VPS set-up. I don't want to ...
0
votes
0answers
10 views

geoipdns data update on the fly not working

I install geoipdns recently. It runs fine but it doesn't take new data updates correctly. Data updates should be made without restarting geoipdns, but it's not. I run the update with these steps: cp ...
0
votes
0answers
27 views

How can I redirect a domain name based on the source Region on Amazon EC2?

I have two web applications, one in Amazon's US-West-1 region and one in the US-East-1 region running on EC2. For the most part, they do the same thing, but they service different customers based on ...
0
votes
0answers
32 views

301 redirect DNS issues

I think I screwed up something in my DNS configuration and now its bugging me for hours. Any help would be greatly appreciated. I own a domain lets call it abc.com Before all the issues happened ...
-1
votes
1answer
21 views

windows server 2012. user creation with mapping personal and common drives [on hold]

I have DellT320 for a small org of 100 users. I have instl windows server 2012 and have created 100 users in computer mgmt Users. My requirement is that i have to provide them 3 folders. 1 folder is ...
1
vote
0answers
33 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 ...
10
votes
3answers
1k views

How does the HTTP GET method work in relation to DNS protocol?

I am trying to understand application layer protocols in TCP/IP stack. I know that both HTTP and DNS protocol stay at the top layer (Application Layer). So, when a browser wants to access a resource, ...
1
vote
1answer
26 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 ...
0
votes
1answer
32 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 ...
0
votes
2answers
63 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 ...
-2
votes
0answers
38 views

Having to constantly update DNS server files [closed]

Problem Have to constantly update DNS server update files, else DNS server becomes unreachable. Restarting lasts only a couple of minutes before it stops working. Environment small office (20 ...
0
votes
0answers
75 views

Too many DNS zones. Need advise

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 ...
0
votes
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 ...
-1
votes
1answer
40 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 ...
1
vote
1answer
24 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; }; ...
0
votes
0answers
29 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. ...
-3
votes
1answer
25 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 ...
0
votes
0answers
20 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 ...
-1
votes
1answer
61 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 ...
1
vote
2answers
13 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
votes
0answers
54 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 ...
-1
votes
0answers
28 views

E-mail sent by gmail aren't backing with msg failure and not are being sent to my postfix server [closed]

Well I can connect via imap, pop and send emails via the outlook of my postfix server. But when i try to send a email from gmail, hotmail or any other to this postfix server, the email doesn't back ...
-1
votes
0answers
13 views

Issue with postfix to send and receive emails in outlook [closed]

Well i followed this tutorial: https://www.exratione.com/2012/05/a-mailserver-on-ubuntu-1204-postfix-dovecot-mysql/ if i connect via telnet in localhost and send email or fetch email with imap ...