73 votes
Accepted

How to manage DNS in NetworkManager via console (nmcli)?

Here is the command to modify an existing connection. nmcli con mod $connectionName ipv4.dns "8.8.8.8 8.8.4.4" connectionName can be found by command: nmcli con. In the question case, it ...
35 votes

DNS A vs NS record

This is an old question, but I think the other answers aren't really touching on the source of the confusion. NS records at the apex follow a different set of rules than NS records beneath the apex. ...
  • 32.1k
16 votes
Accepted

How to I make a domain resolve to different IP's when resolved from internal network and external network?

In BIND 9, you can define multiple "views": in effect, BIND shows one version of a DNS zone to specified clients and another version to others. This seems to be exactly what you'll need. Here is a ...
  • 4,233
14 votes
Accepted

DNS root record hardcoded then why it has ttl?

Typically you would explicitly configure the DNS root servers similar to the snippet below: zone "." { type hint; file "/etc/bind/db.root"; }; Where you observe that zone type is not the common ...
  • 73.4k
13 votes

BIND permission errors

This looks to me like an AppArmor problem. Try setting it to permissive temporarily and see if the problem goes away. By default, the Bind/Named daemon does not have permission to write to the zone ...
12 votes
Accepted

DNS servfail at some of Nameservers

A SERVFAIL answer tells you there's an issue reaching the DNS server for your domain, or that it isn't set up properly. It looks like you're only replying to A queries from your DNS server, which ...
11 votes
Accepted

Why is my dns server being queried for domains that I don't host?

If you are running a public accessible DNS server then other clients may be start using you. Maybe to use you as a public resolver or maybe to abuse your service for an DNS amplification attack. If ...
  • 17.4k
11 votes
Accepted

BIND dns high performance caching

High performance and low memory usage + short cache time are conflicting requirements. However, what should happen when hitting the max-cache-size limit is that it should start (prematurely) evicting ...
11 votes

Domain will not propagate (Over 96+ Hours)

I'm basically parroting Michael here, but this is too much to paste into a comment: ;sai.ngo. IN A ngo. 172800 IN NS b0.nic.ngo. ngo. ...
  • 32.1k
11 votes

How to manage DNS in NetworkManager via console (nmcli)?

there is good TUI tool developed by red hat named nmtui that you really should try. it is pre-installed on various distros, nowadays, but if it is not on yours, try: sudo yum install networkmanager-...
11 votes
Accepted

AWS Route 53 CNAME - dot at end of target value or not?

From the Route 53 documentation on record values: CNAME — Canonical name The fully qualified domain name (for example, www.example.com) that you want Amazon Route 53 to return in response to ...
10 votes
Accepted

DNS errors after changing nameservers for Cloudflare

The error messages and the referenced RFC2181 5.4.1 pretty much already tells what's wrong: you are having conflicting NS records in your zone and in the parent zone as "glue" records. "Glue" above ...
  • 44.5k
10 votes
Accepted

CDN: How is it possible that my DNS delivers a different IP depending on the visitors location?

Ok it seems I can now give a rough answer to my own question. Anurag Bhatia says that there exist two methods how a CDN works: DNS Have DNS to do the magic i.e when users from network ISP A lookup ...
  • 459
9 votes

How many is too many name servers (ns)?

There is such a thing as "too many nameservers", but not for the reasons you're concerned with. The others have covered the irrelevance of latency concerns and I won't beat that horse to death. The ...
  • 32.1k
8 votes
Accepted

what does this mean Superfluous name server listed at parent: ns52.domaincontrol.com?

The two error messages are both indications of the same misconfiguration. In the com. zone, you have two NS records pointing to ns51.domaincontrol.com. and ns52.domaincontrol.com. Both respond to ...
  • 30k
8 votes

How to manage DNS in NetworkManager via console (nmcli)?

In addition to setting the ipv4.dns property described above... To exclude the DHCP provided DNS servers...set the ipv4.ignore-auto-dns property to yes. nmcli con mod <connectionName> ipv4....
  • 81
7 votes

setting up bind to work with nsupdate (SERVFAIL)

I was having very similar issues until I changed the location of where I stored my zone files. Bind had permission to write to /var/cache/bind, but your zone files are stored in /etc/bind/.... Bind ...
  • 71
7 votes
Accepted

Missing nameservers reported by parent and your nameservers

The nameservers currently listed at the .pt top level registry are ns1.esoterica.com and ns2.esoterica.com. When I query those two servers, neither of them has any information about your domain, so ...
  • 27.5k
7 votes
Accepted

BIND - increase in outgoing NS queries after upgrade to CentOS 6.7?

The change in behaviour seems to be related to this changelog (from RedHat's site): 2015-02-19 12:00:00 Tomas Hozza <thozza@redhat.com> 32:9.8.2-0.35.rc1: - Enable RPZ-NSIP and RPZ-NSDNAME ...
7 votes

How many is too many name servers (ns)?

Let's be clear. Ever since the outage of a low cost low end provider of whatever you do not trust a technology that is proven. Why? You think everyone is as incompetent as GoDaddy? Never had a DNS ...
  • 51k
7 votes

How many is too many name servers (ns)?

RFC2182 section 5 recommends at least 3 nameservers, and preferably no more than 7.
  • 7,726
7 votes
Accepted

Domain is reporting incorrect Name Server information

Focusing on the actual problem with your domains: Following the chain of delegations for lamardesigngroup.com you'll see a delegation to ns1.lamardesigngroup.com and ns2.lamardesigngroup.com with ...
7 votes
Accepted

Why am I seeing IPv6 resolve errors despite having disabled IPv6 in bind?

If the system is using systemd then editing /etc/default/bind9 will have no effect. Edit /lib/systemd/system/bind9.service file instead and add -4 option to ExecStart variable. I'm using Ubuntu 16 ...
7 votes
Accepted

Does a single Root Name Server and a TLD Name Server have only one Zone file?

There are several things to address here: Zones vs files It's probably more relevant to talk about how many zones they have, rather than how many files they have. It will depend on the nameserver ...
6 votes

Setting different NS records as authoritative on authoritative DNS

There are really two questions being asked here, and they directly contradict each other: how do I instruct DNS servers to continue their query on to Amazon as its authoritative for the domain, ...
  • 32.1k
6 votes

My web hosting provider is providing 4 nameservers, which do I use to to point my domain?

All of them.​​​​​​​​​​​​​​​​​​​​
  • 32.4k
6 votes
Accepted

Order of DNS A records and wilcard subdomains

Wildcards do not apply to the root record of the domain, so (1) will be the only A record for example.com The key point about wildcards is that they only apply for otherwise non-existent subdomains, ...
  • 3,416
5 votes

Does it matter if the DNS server of a domain is on a different TLD?

It is not a problem per se, you should just make sure not to create loops: if domain1.example has ns1.domain2.example and ns2.domain2.example, having at the same time for domain2.example nameservers ...
5 votes

Can you lookup a domains past nameserver & mx record history?

Here is another one https://completedns.com/dns-history/ It does support a lot of domain TLDs - list of supported TLDs. With the free account you can make up to 100 queries for nameserver history.
  • 61
5 votes

Vanity nameserver problems

You missed this bit from the guide For example: (Do not forget the trailing dots) If you do a DNS query for ns1.buzztera.gr no results are returned however if you do a query for ns1.buzztera.gr....
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Only top scored, non community-wiki answers of a minimum length are eligible