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

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1answer
23 views

Redirect traffic from one server to something.cloudapp.net (CNAME)

Through out North America, we have lots of legacy devices, which sends data to our server which has static IP Address. Now we are moving to Azure cloud services, and as you know they do not guarantee ...
-2
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0answers
27 views

Optimzing Web Server [on hold]

I'm trying to increase connection speed and at the same time reduce server load for my web application. I'm looking at setting up something similar to a CDN (Content Delivery Network) but that's able ...
2
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2answers
132 views

Forward all TLD requests to another server

So, an emergency has been landed in my lap, and unfortunately I'm ill-equipped to deal with it. An IT tech for a client's company changed the A record for a domain, then went on holiday. He is the ...
0
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2answers
716 views

PHP/cURL/Fedora issues resolving hostname possibly a DNS problem?

I have the following simple test script for cURL/php on a FC12/apache server that has PHP 5.3.2, cURL v7.19.7 (according to phpinfo()): $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, ...
6
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3answers
5k views

How to configure email autoconfiguration for a domain?

Outlook and a number of other email clients now feature autodiscovery of mail server settings and it bugs me that I don't have this set up for our domains, but I'm not sure how to do it and a quick ...
1
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1answer
2k views

Bind FORMERR errors in syslog

I've recently switched out a failed router... and, a while later, I discovered a lot (at least an order or magnitude more than the number of queries) of errors reported in /var/log/syslog - of the ...
-3
votes
1answer
40 views

Namservers (NO GLUE) on .EU domain [on hold]

I have two cPanel accounts with two different domains. one is sunrisetrip.com and the other sunriseholidays.eu. Both have the same nameservers, both are bought from the same registrar. the .com domain ...
6
votes
3answers
183 views

How to prevent Bind from responding to spoofed IP addresses?

We all know about open resolvers, this question is kind of for the inverse situation. I have a DNS server that is locked down to certain CIDRs acl trusted {[..] options { [..] allow-query { ...
1
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2answers
2k views

Windows 2008 DNS Export all A Records

I know about dnscmd /enumrecords, however what I want to do is export all records from every single zone housed on this server. I was hoping there was a simple recursive function to do this. We have ...
4
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2answers
201 views

Nameserver working for all TLDs except .org

I've recently set up a private name server (ns1.mediamechanic.net / ns2.mediamechanic.net), and it appears to be working for everything except our .org domains (see obapps.org). As far as I can tell, ...
1
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2answers
16 views

Postfix sending and receiving in strange way.

I have an email server, running on CentOS 6.5, 32bit system, with Postfix and Dovecot running along all their dependencies. Let's assume my domain is www.anw.com I have created A record in this ...
0
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2answers
17 views

Handling emails in a separet email servers

This is a problem about maintaining an all-email VPS server. First, I have two VPS hosts right now, both running CentOS 6.5, 32bit system. one for web hosting and other for email only. The reason ...
0
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1answer
25 views

Installed RBLDNSD for making a custom RBL but something is missing, could you help us?

We have successfully installed RBLDNSD with the idea of having a custom RBL server. Now we have started to make some testing adding some IPs to the our blacklist, and also have configured Exim (Cpanel ...
-1
votes
1answer
12 views

Custom domain, DNS A Record Breaking old URL Paths [on hold]

I'm working on for a client and we created a website using a CMS template called Virb.com (sort of like squarespace.com). To get his custom URL to link to his new website, we needed to change an A ...
1
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0answers
20 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 ...
1
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1answer
69 views

Fix slow SSH login due to reverse lookup without disabling UseDNS

Whenever I try to connect to my server from Azure VM it takes a lot of time due to failing reverse DNS lookup. I can disable lookups with UseDNS no and completely bypass the problem but this makes ...
0
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1answer
17 views

Windows DNS dnscmd.exe SecureList syntax

DnsCmd let's you provide a list of nameservers to allow for secure zone transfers, however providing a list like 127.0.0.1 10.0.0.2 10.0.0.4 causes the machine to consume memory and CPU until it ...
7
votes
8answers
6k views

Why can't some websites be shown without the “www” in the URL?

I used to type the website URL without the "www" and it works fine with almost all sites that I have tried, so far. But I realize that my university's website never show up if you don't type the ...
0
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2answers
42 views

How does Cloudflare know about my Subdomains?

I just signed up Cloudfare and they showed me a list of my subdomains by scanning my domain. How do they do this? What technology is used to scan all subdomains related to a root domain?
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0answers
13 views

Second FTP Server On Subdomain [on hold]

I've my own domain name that I'm trying to set up with two FTP servers. (I have two totally independent FTP servers I want to be able to access.) I set one to run on the standard port, 21, and the ...
-1
votes
0answers
45 views

IPTABLES: why does accepting outgoing DNS on port 53 bring down my websites?

I have a handful of websites running with Apache. I've installed Sendmail and am trying to configure IPTABLES to allow outbound emails. When I allow output DNS with the following command, I can send ...
0
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0answers
7 views

maraDNS NON-AUTH timeout

I've set up maraDNS to provide my own DNS records. I've pointed the domain nameservers at my registrar to ns1.domain.co.uk and ns2.domain.co.uk (using domain in place of actual domain name). I cannot ...
1
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2answers
23 views

Cannot access my GitHub Pages website by IP Address

My custom domain works with GitHub Pages but I would like to understand how it actually works. For this example I am not using my custom domain at all. My GitHub Pages repository does not ...
3
votes
2answers
43 views

Enumerate Windows DNS Server Zone attributes via shell

I'd like to use a command-line tool to list a (primary) zone's configured secondary servers, if any. Dnscmd comes close with: dnscmd server /ZoneResetSecondaries:[list of secondaries] But, I ...
0
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1answer
14 views

Bind Requested DNS Server IP Log

I have a DNS Server which runs on a virtual linux box with several IPs. Bind provides some pretty detailed debug logs, however, one piece of information that doesn't seem to be logged is the requested ...
1
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2answers
1k views

DNS (bind) : How do I redirect an http request to a different domain, based on the requested domain

I host my own DNS server and would like to be able to redirect links from within the DNS server so that redirection is seamless. Example: redirect all requests for www.yahoo.com to www.google.com. ...
0
votes
1answer
23 views

How to redirect custom urls to some local IPs with pfSense [on hold]

I'm using a pfSense router and I'm desperately trying to configure a custom url (eg: myurl.ext) that should be mapped by pfSense to a local server (eg: 192.168.0.x). Like I do with my /etc/hosts and ...
1
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0answers
17 views

Domain Controller's DNS NIC configuration [duplicate]

I've seen conflicting information on this online, but say you have an environment with two domain controllers: one Forest, one Site, one Domain; simple as it gets. How should each domain controller's ...
0
votes
1answer
41 views

Forwarder dns not resolving reverse lookups

I have created one new dns server in lab and its working properly. Earlier we were using another dns server for lab pc's as 10.20.30.xx. which is outside the lab premises. now issue with newly created ...
1
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2answers
28 views

Vanity name servers with .no domains

I created vanity name servers e.g. ns1.example.com and ns2.example.com that are just maskеа and are pointed to rackspace free dns service. In other words ns1.example.com points to ...
0
votes
5answers
264 views

Allow external domains to use my nameserver without using BIND

Is it possible to allow users to point their domains to my nameservers from their domain provider, e.g. GoDaddy, 123-reg, etc. For example, they enter my nameservers: ns1.domain.com, ns2.domain.com ...
1
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1answer
15 views

Locally resolve a name in a DSN lookup (Host not found: 3(NXDOMAIN))

I have a Ubuntu 14.04 Server virtual machine in which I would like to resolve a symbolic name to an IP address locally (i.e., the machine itself should provide the mapping). The mapping is the ...
0
votes
1answer
22 views

Delegate NS resource record of IPv4 subnet

Is it possible for a reverse zone to name another DNS server in the NS record? I want to delegate DNS for all addresses within a subnet to a site using that subnet. Our office leases a subnet which is ...
2
votes
3answers
9k views

Conditional DNS forwarding with named on Linux

I have a Centos 5.2 server which runs named for DNS resolution - it doesn't hold any information of its own, and just forwards all requests. From the named.conf: options { [...] forwarders ...
-1
votes
1answer
38 views

Way to find all domains that have a CNAME to my domain? [closed]

I have a web service that allows users to white-label our software by using their own domain over ours. This is done by the user adding a CNAME record from their domain to our domain. Is there a way ...
-2
votes
2answers
29 views

AWS SES TXT Record Content

I need to get AWS SES setup for a domain. The registrar's DNS tool only allows me to put in a block of text for the TXT/SPF records (one block per record). I'm not sure how to format the TXT record as ...
0
votes
1answer
2k views

Dynamic DNS registration for VPN clients

I've got a VPN server set up in my Active Directory on a remote network. (VPN Server is separate box from DNS/AD) When I dial into the network (client machine is not a member of the AD) the machine ...
-2
votes
1answer
23 views

How can dns be used to cross-redirect sites [closed]

Two sites, a.com and b.com are independently hosted, owned and operated. Each has its own database which is synchronized with the other. If a.com is down, it automatically redirects to b.com, and vice ...
0
votes
2answers
693 views

Proxy Settings per Machine not working on windows server 2008 R2 SP1

i have a very interesting problem and would appreciate any help for it. In my scenario i have scripts which bring up a VM inside a domain. Now i want to enable internet access for all the VM's and ...
1
vote
1answer
33 views

BIND DNS zone coalfired.net/IN: coalfired.net.coalfired.net/NS 'ns2.thirteen.pm.coalfired.net' has no address records (A or AAAA)

Since I updated my BIND DNS server I seem to be having problems with it. For some reason, when I try to start the server I get errors such as this appear: zone coalfired.net/IN: ...
1
vote
1answer
900 views

Mac OSX Server 10.6 DNS Issues

The server was upgraded from 10.5 from 10.6, during the upgrade the Reverse Zones were lost so I tried to recreate these but found that it's best to delete all zones, definitions and start again. So ...
0
votes
2answers
2k views

No DNS resolving with VPN (RRAS)

I have a RRAS server setup on a Windows 2003 machine with two NIC's. The VPN works like a charm, I can ping all the other computers on the network. But it fails when I try to access resources with ...
1
vote
3answers
91 views

DNS - spam recursion querries

I am using PowerDNS Recursor in local ISP environment. Recursion is allowed only from our IP range but I've came with strange issue. Our own customers PC keeps attacking our DNS server with queries ...
1
vote
1answer
58 views

Another domain points to my webserver

Somebody else has registered a name pointing to my webserver's IP address in .ma TLD. My domain foo.bar -> my ip address 1.2.3.4 Somebody defined: suspiciousdomain.ma -> my ip address 1.2.3.4 So ...
0
votes
1answer
37 views

Sender address rejected (mx record not found)

I am using both Exim and Office 365 to send email - the server sends automated mails from an application using Exim and Office 365 handles day to day user and incoming email etc. I am getting some ...
0
votes
1answer
54 views

Can ping and browse IP, FQDN, and hostname but can't browse via SMB to hostname of server

Got a strange problem where on a server 2008 machine I am trying to browse to another server 2008's shares on a different site. I can ping the server's ip address fine, I can ping the servername ...
3
votes
2answers
46 views

What is the role of NS records at the apex of a DNS domain?

$ORIGIN example.com. ; not necessary, using this to self-document $TTL 3600 @ IN SOA ns1.example.com. admin.example.com. ( 1970010100 7200 1800 1209600 300) @ ...
1
vote
1answer
764 views

The system has detected a possible attempt to compromise security

We have two separate Active Directory domains that have a trust relationship. When I access a network share on the other machine I am prompted for a username and password even though I am logged on ...
0
votes
0answers
9 views

How do I configure winbind to only register some interfaces with DDNS?

We are running an Active Directory. The hosts joined to the domain are a mix of Windows machines joined natively and Linux machines joined using winbind. All hosts have statically configured IP ...
0
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0answers
16 views

DNS-SD registration of “printer_queue1” failed with -65548

I get this message from logs i am not sure that its the avahi daemon or some networking issue communicating to the DNS servers. How can i find if this an issue with avahi daemon or CUPs server in ...