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

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AWS route 53: If I want to use external server do I need to change SOA & NS records?

If I want to point to a server not in AWS, Do I need to change the SOA & NS records that are created automatically (by route 53) ? Thanks Rafael.
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1answer
18 views

Setting up two Bind9 DNS Servers on LAN with one serving a particular zone and the other hinting to it

I have set up a Bind9 DNS to serve names on a local netword 172.16.0.0/16. This Bind9 DNS service works fine and resides on 172.16.0.4. It serves names in the domain "mydomain.mak" correctly to all ...
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1answer
17 views

Is it required to keep DNSSEC zone fresh?

I've found the following guide on how to setup DNSSEC with NSD DNS server and ldns utilities: https://www.digitalocean.com/community/tutorials/how-to-set-up-dnssec-on-an-nsd-nameserver-on-ubuntu-14-04 ...
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1answer
32 views

Trying to set up port forwarding for multiple subdomains using SRV and DNS

I am working on a startup and trying to keep my expenses low. I'm hosting four servers in my closet with a single static IP address. I want to be able to reach each server over ports 80 (HTTP), 443 ...
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2answers
861 views

AWS VPC External DNS issue

I have booted up an instance in side a private VPC. I assigned an ElasticIp address to it and I can ssh into the instance with no issues. However, DNS is not resolving :( in my /etc/resolv.conf I ...
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1answer
447 views

DNS Bind9 Issue - Server not forwarding requests

I'm new to dns admin so please be gentle. Here is my set-up: Domain name with a few A records points to my personal IP. example.com server1.example.com server2.example.com Router forwards all port ...
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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 ...
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0answers
14 views

Domain name redirection for wildcard domains (pref ALL possible domain names) [on hold]

im trying to setup a redirection towards an app that im writing in Java. This app opens a port 8443 on my laptop (which is a MacOS 10.10 Yosemite) and offers a HTTPS service. The big plan is to have ...
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3answers
22k views

Do entries in local 'hosts' files override both forward and reverse name lookups?

If I have the following entries in a hosts file: 192.168.100.1 bugs 192.168.100.2 daffy.example.com 192.168.100.3 elmer.example.com. Will IP->name resolution attempts by local utilies (I ...
0
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1answer
182 views

“Reverse lookup” in DNS zone text file [closed]

Is there an existing tool or a cool or interesting way to find all items in DNS zone file, which are "resolving" to given IP? (not using any DNS server at all) For instance, we might have following ...
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0answers
44 views

Debian DNS servfail

I have serious problems, and been struggling for days with this...Please help me what's the problem? :( i get servfail error everytime i do nslookup, and i tried everything... Please save me! very ...
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1answer
34 views

Distributed webservice, geolocalized access

I wish I could deploy a very low network latency webservice (running Linux). I was thinking about distributing some instances amongst several dedicated servers (eventually VMs, but not the preferred ...
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2answers
44 views

Subdomains are not resolving

I have an Ubuntu+Virtualmin server with multiple sites on board. Sites are working fine but for some reason "www." and other subdomains are not resolving. My server IP is 107.170.xxx.xx. If I add ...
0
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0answers
15 views

PHP FPM, chroot can't connect to AWS RDS

I've been experimenting with chroot'ing php-fpm pools via the built-in chroot method in php's pool config. This is for the purpose of hosting multiple wordpress websites on the same AWS EC2 instance. ...
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0answers
24 views

redirect traffic dns iptables [closed]

I'm running a server(piratebox) on my tomato wifi router. The router is connected to the internet. I want certain clients be connected to the internet and the rest will be redirect to piratebox. I'm ...
0
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1answer
1k views

dig succeeds, nslookup fails (with dnsmasq as the server)

I installed dnsmasq on a machine of mine (It's a Kubuntu 12.04 LTS), backed only by /etc/hosts (no connection to the Internet until later). Now, if I dig mymachine, I get 192.168.0.1, but if I try to ...
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0answers
30 views

Unable to set up name servers [migrated]

I've set up a server at my house running cPanel and CentOS. I'm unable to point a domain to the server using nameserver's. I can how ever point it to my server using an A record. I've set up port ...
2
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1answer
5k views

UnKnown can't find <hostname>: Non-existent domain

I have a small network running Windows Server 2012 servers and Windows 7 clients. Right now I'm trying to setup DNS with an AD-Integrated Zone. I've configured my local machine, which is not a domain ...
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1answer
25 views

SPF Softfail when Txt Record Exists

I am getting softfail for SPF and Sender-ID and I tested it by sending an email to check-auth@verifier.port25.com. My Set-up: 1 VPS hosting 1 website Postfix for Send only emails No incoming ...
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2answers
32 views

Getting “An operation on a socket could not be performed because the system lacked sufficient …” when server access the internet

I have ASP.NET application running on Windows Server 2008 R2 hosted on Rackspace servers. Suddenly something went wrong. All my application working fine except for the pages which call third part ...
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1answer
32 views

What’s the difference between recursion and forwarding in bind

I’m trying to understand how bind works but have been unable to find definite information about the difference between recursive queries and “forwarding”. I’ve read that globally allowing recursive ...
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2answers
194 views

How do I connect Namecheap domain to HostGator server? [closed]

I'm new to the process of buying domains and hosting packages. I bought a domain at Namecheap and hosting at HostGator. I'm able to connect to my server via IP address only. I can add files, ...
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1answer
15 views

Domain keeps getting rewritten without mod_rewrite enabled

So essentially when I go to http://www.example.com OR http://example.com the URL gets rewritten to just www.example.com OR example.com dropping/removing the http:// part. I'm not sure why this is ...
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1answer
20 views

Windows DNS stub zone with 2 NS listed inside, which one will be queried?

For a Windows DNS server stub zone, we have 2 NS servers listed there and the SOA information is correct. Both NS servers are "identical" (they sync the zones, so both are masters, so to speak, but ...
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2answers
2k views

How to Tell Whether a site is using Akamai Networks

I'm trying to understand precisely how Akamai uses DNS lookups to redirect users to proximate servers. As I understand it, the client's browser tries to resolve a DNS name, such as ...
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3answers
8k views

How to get **all** IP addresses of a domain?

I built the getaddrinfo() sample provided at http://beej.us/guide/bgnet/output/html/multipage/syscalls.html#getaddrinfo When I run it on an example domain, such facebook.com it lists three (3) IP ...
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7answers
4k views

Why does this DNS lookup fail for me but work for others?

Day One I have to hide the actual host names, so I'm hoping there is still enough information to answer this question... I'm trying to resolve a certain host name (let's pretend it's ...
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1answer
72 views

Domain changes required for SSL integration

Currently my site supports regular payment options (User is taken to Payment Gateway/PG website). Now I'm trying to implement "seamless" PG integration. I need SSL for this. I'm having a dedicated ...
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3answers
3k views

Is it true that a nameserver have to answer queries over TCP?

I'm the process of setting up a monitoring of DNS servers of several large web hosts. My goal is to compare their dns servers response times by tracking their response to ping. In the process, I ...
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1answer
139 views

Blogger custom domain - pitfalls of domain pointing?

This is quite a common topic to come up - wanting to use a custom host for a blogger blog. My personal reasons are due to issues concerning iframes, SEO and the specific address of the blog. I have ...
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2answers
58 views

Bind DNS server respond timeout

I've set up a BIND DNS server on centos 7. I've created the master zone record, it is the following: $ttl 38400 loool.ro. IN SOA ns1.loool.ro. owner.yahoo.com. ( 1421842090 ...
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1answer
48 views

Is it possible to have a local authoritative DNS that falls back to Route 53 for unknown local subdomains?

I have a local Forward Lookup Zone (Win Server 2003) for zxurian.com that has it's own A record, as well as a few subdomain records. I also use Route 53 for public DNS, and have a hosted zone there of ...
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3answers
3k views

cannot resolve DNS server's own domain name

I have a DNS server (mega.dude - 123.123.123.123) running bind 9.4. When I: dig mega.dude I get no answer section. I have nameserver 123.123.123.123 in /etc/resolv.conf Here is my zone file: ...
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1answer
11 views

Unbound DNS: How to get source IP address from python mod

I use Unbound DNS with a custom python module. Based on who sends a query, I want to return different results. How do I get the Source IP from the Python module?
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2answers
3k views

How can I send visitors to the closest server using DNS?

Is there a way to localize dns entries? Meaning, that users from asia resolve mydomain.com to another ip than users from usa or europe. This would be helpful to give the users the server nearby. DNS ...
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2answers
59 views

TTL in ping vs dig

When I ran ping google.com, I get a ttl value of 55: 64 bytes from 173.194.127.103: icmp_seq=68 ttl=55 time=16.4 ms When I ran dig google.com @ns1.google.com., it get a TTL value of 300. ...
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0answers
53 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 ...
4
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1answer
2k views

using wildcards in host-aliases for Tomcat's virtual hosts

I want to do the following with Tomcat 5.5: *.mydomain.com should go to my webapp, located at the virtual host mydomain.com. So I have a virtual host mydomain.com, and I want all *.mydomain.com also ...
0
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1answer
33 views

how do i make my website accessible to the internet without a static ip and from a virtual machine? [closed]

I have windows 8 host and i have installed ubuntu 14.10 server as a virtual machine in vmware. i have installed LAMP server and i am trying to host a website from it. i have created a virtual host. my ...
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5answers
567 views

Free Dynamic DNS Nameservers [closed]

I recently set up a server that I want to use as my primary hosting platform. So far, I've mapped some domains to it by setting up A records for them that point to my dynamic IP. As my IP can change ...
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2answers
66 views

why does dig +trace sometimes reply with a list of authoritative nameservers as well as the record?

using the examples below dig +trace stackoverflow.com dig +trace google.com dig +trace yahoo.com dig +trace bbc.com the first two show me only the A records for the queried domain, while the last ...
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1answer
31 views

When does caching name-server include the authority section?

I would like to find out the authoritative name-servers for swedbank.se domain. I queried few caching name-servers for swedbank.se and while some answered the authoritative name servers, then others ...
0
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1answer
22 views

Hybrid Forward Lookup Zone

We have an active directory domain companyName.local (I know, not recommended), and a public domain companyName.com. We have a mix of cloud servers and internally hosted servers. What I would like ...
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3answers
230 views

http is automatically redirecting to https for a custom domain on google app engine

I am trying to get a custom domain to work with Google App Engine 1.9.7 without SSL I have done all the prerequisites; Domain is verified with the proper TXT records. Domain is configured in the ...
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0answers
19 views

mx recodrs misconfigured in ZPanel [closed]

I am using ZPanel for my domain and hosting. now my domain is working is fine. but i facing some problems on Webmail configuration. I am updating My DNS Recods in Zpanel like this Host Name TTL ...
7
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3answers
165 views

Server 2012 R2 Active Directory Domain SRV dns records suddenly disappeared

I have a test domain that I recently configured. All of a sudden, no users can log in except those with cached credentials. The domain includes two domain controllers that are both global catalogs ...
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2answers
36 views

Following CNAME alias causes different HTML rendering

I am running Windows Server 2012 with Apache and ColdFusion 11. In our DNS manager on our local domain, we have set up a CNAME alias that points to our reporting server. When you access the the ...
17
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2answers
927 views

DNS Server Responses and Timeouts

We're experiencing a frustrating problem on our LAN. Periodically, DNS queries to our ISP nameservers timeout forcing a 5 second delay. Even if I bypass /etc/resolv.conf by using a direct dig to one ...
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2answers
45 views

Forward requests from registrar to black hole / captive portal DNS?

I have a number of domains that that I would like to set to change the nameserver for to rewrite.mydomain.org. The goal is to have any domain names with this nameserver be routed to a specific Apache ...
2
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1answer
23 views

Configuring RRL on a DNS server using BIND

I'd like to configure a DNS server to use Response Rate Limiting (RRL) to mitigate DNS DDoS attacks. Whatever, I have to configure it top use RRL with the 'slip' parameter at 2. I've made some ...