Questions tagged [domain-name-system]
The Domain Name System, usually referred to by the acronym DNS, is a hierarchical, distributed database where the keys are domain names. Questions involving publicly accessible domains should include the real, Fully Qualified Domain Name (FQDN)
12,322
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Windows :Multiple DNS query while ping and nslookup when 2 NW adapters attached
On Windows 11, I am looking no of DNS queries trigerred when 2adapters attached to device. To test this I attached wireshark for each ethernet(ethernet1, ethernet2). when I ran single nslookup command ...
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15
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Rewriting header of ip accessed IIS server
I have server which has only port 180 > 80 and port 1443 > 443 mapped and open, I can't change this setting because of server owner. Because of that I can't setup proper dns record and I am ...
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3
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135
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How can I setup a DNS server for a subdomain behind a dynamic IP address?
I'm working on a secure/isolated service that manages TLS certificates using the ACME protocol. The server needs to respond with a TXT record on a specific subdomain. This server won't service ...
- 117
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28
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Static IP directs to hosted service behind a proxy server but the mapped Domain name directs to Router GUI
I have a domain name (eg. example.com) that is mapped to a static IP say 245.125.145.155. I have some services in a hosted server in my LAN and proxied by a proxy manager. When I type the static IP ...
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1
answer
27
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How to mix DHCP-provided DNS servers with statically written DNS servers?
I am trying to make a combination of the DNS servers provided by my ISP and 3 static (8.8.8.8, 1.1.1.1 and 9.9.9.9).
On Ubuntu 18.04, I did it by adding the static DNS to "/etc/resolvconf/resolv....
- 15
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votes
2
answers
856
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Remote domain: DNS record A exists when NS does not
I have encountered a domain for which I can sucessfully retrieve a DNS A record. At the same time, however, any public DNS server seems to return empty NS record. The domain in question is bluedriving....
- 305
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10
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Meaning of "Flags" column in dnsmasq log output
I sent a SIGUSR1 signal to the dnsmasq process to make it write statistics to the system log. Here's an excerpt of what dnsmasq wrote to the system log:
daemon.info dnsmasq[1]: Host ...
- 115
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28
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SUBdomain redirection not working for https (apache)
I have a problem with redirecting the address: aa.bb.cc to bb.cc/aa
DNS is under the control of OVH. Redirection works for http calls and redirects on a page that is https.
However, if he calls https:/...
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1
answer
34
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How can I set up a local DNS or proxy that uses OpenNIC for OpenNIC domains/TLDs, and Cloudflare (or any other) DNS for the rest?
I've been pondering how to achieve this for the past few days. I love OpenNIC and everything they're doing, but sometimes the DNS servers are not always the best for normal, daily usage. While it's ...
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38
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MacOS custom resolver not working
I use an Apple Silicion Mac and am trying to configure a custom resolver.
I have created a file in /etc/resolver/ called test, and the contents of the file are:
❯ cat /etc/resolver/test
nameserver 127....
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0
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76
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How to create zones and zone files for existing public zones on an internal BIND server? [closed]
We have two BIND DNS servers in our infrastructure and all of the servers and clients DNS servers are set to these two BIND servers.
We want to create some records for DNS resolution and since our ...
- 170
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1
answer
115
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Why am I not able to resolve names on subnet behind a lab network?
I have gotten the task of setting up a network where there is an existing gateway for my "public ip" 10.200.3.2/28 already. I am to setup a gw/dhcp which uses the existing gateway the given ...
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2
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146
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nslookup fails while dig succeeds with private Route 53 hosted zone
I have set up a private AWS Route 53 hosted zone.
If I run nslookup on the newly added entry, I receive an error:
$nslookup search.syndey.recap
Server: 127.0.0.53
Address: 127.0.0.53#53
** ...
- 101
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33
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Which Domain to use for the Google Cloud Console Organization Setup if Working with Different Domains
I have some questions about setting up the GCC Organization please.
A new Google Cloud Console account was created when setting up this domain in the Organization section of an existing GCC account ...
google-cloud-platform
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61
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DNS Issues with Kubernetes Cluster : no servers could be reached
I'm still experiencing dns and network issues
And I'm at a dead point, looking for hints and suggestions
Summing up :
Following the indications found here : https://kubernetes.io/docs/tasks/administer-...
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1
answer
155
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How target group dns failover works with AWS
I currently have an AWS load balancer and it has a target group, containing an instance per AZ: 2 of these are unhealthy and I have configured the attributes of the target group so DNS failover ...
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0
answers
23
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How do I setup DNS for a local email server with a SMTP relay [migrated]
I'm trying to move my mail server (multi domain) to my home to increase security/privacy.
Therefore I set up a local server and a SMTP relay (postfix) on a hosted VPS (because of static IP, etc.).
...
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0
answers
28
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How is the URL "ai." parsed? [migrated]
I found that browsing http://ai. returns a web page.
This is no longer a public website. If you have come here you are at
the wrong place. You probably want to go to one of these sites:
whois.nic.ai ...
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answers
127
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Unable to access SMB share with DNS Cache service disabled from Windows Server 2022 but it works on Server 2019
I have a requirement to disable the Windows DNS Cache on a new Windows Server 2022 RDS VM.
Trying to access a SMB share hosted on a Windows Server 2022 file server, all my servers are joined to a AD ...
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2
answers
54
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Using Azure Firewall's DNS Proxy with an internal DNS Server
Question
If using Azure Firewall's DNS Proxy with internal DNS severs behind this same firewall, what happens to requests for external DNS records (i.e. does this cause an infinite loop where the DNS ...
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87
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Coredns does not return the result properly
I configured new Coredns in kubernetes and exposed it to LoadBalancer of service. Also I added a dns server to my local laptop. This is my new zone.
nlabs.hosts nlabs.io:53 {
hosts {
10.0....
- 101
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2
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53
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Order or precedence for A or CNAME record
I need to send two addresses for the same, let's say domain, and based on the ORDER, send traffic to the first address until it becomes unavailable, which the application knows. It just needs DNS to ...
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2
answers
228
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Why do I have to specify the DNS server when doing a forward lookup?
I'm trying to set up a small, private DNS server. I'm using Bind9 and systemd resolved, netplan for managing the network. I've specified the DNS server in both the netplan configuration and /etc/...
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1
answer
35
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How can i fix source ports in BIND 9.16.xx?
The older cache DNS server in my team is configured with BIND 9.11.4; it uses 53 as the source port number.
options {
...
query-source port 53;
...
}
Meanwhile, the new one has BIND 9.16.23 ...
- 1
0
votes
1
answer
48
views
Two nameserver domains that refer to each other causing issues
I have a VPS which hosts multiple domains including (modified for privacy):
mydomain.co.uk
mydomain.uk
I have registered name server GLUE (verified) for the following - all use the same IP address:
...
- 101
1
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0
answers
15
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Bind rpz only gives max TTL of 5 seconds
When I configure BIND with response policy zone so I can override DNS for LAN network I have noticed that TTL returned by this DNS servers max out at 5 seconds. I can lower TTL to 1-4 seconds but ...
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15
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pfsense temporarly failed to resolve hosts
Suddenly I was unable to reach the outside world.
I pinged one IP on internet, it worked
I tried to resolve a hostname with the dhpd configured server, i.e. netgate/pfsense, timeout
I tried to ...
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1
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35
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What happens if the Root name server gets down? [closed]
What happens if the Root name server of a TLD gets down? Does it lead to the malfunction of domains with that domain extension?
- 101
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3
answers
173
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Change primary and secondary DNS on domain servers using GPO
Windows Server 2016.
All Servers in domain obtain IP address automatically and DNS addresses are set manually:
Primary DNS 172.16.0.1
Secondary DNS 172.16.0.2
I created a 3rd DC (172.16.0.3), and ...
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-1
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0
answers
29
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Error when creating an A record for a specific servername. I'm able to create others
I'm unable to create a A record for a server, SERVER1 . The record does not exist.
When i try to create it I recieve the message "The host record SERVER1.xxx.yyy cannot be created. Access is ...
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Getting err_tunnel_connection_failed and err_connection_timed_out when accessing URL
My company has deployed an SSO solution using Duende Identity Server and Okta
We are using a proxy as the middleman between Identity Server and Okta:
https://apacwelcome.saas.mrisoftware.com
99% of ...
- 195
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16
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Sending of DNSSEC-related records in DNS responses
If a DNS name server supports DNSSEC, does it mean that every DNS response it sends will include DNSSEC-related records, like NSEC, NSEC3, RRSIG, etc? Or does it depend on what the resolver sent?
I ...
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70
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How to correctly load balance requests from a Java client to an NLB over multiple AZs
Requests from a Java client to an NLB over multiple AZs Not load-balanced
Summary:
Expectation: every request from Java is load balanced between two nodes.
Actual behavior: all the requests go to one ...
2
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2
answers
129
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Can you create a domain record that could be used as an inbound IP allow list?
Is there a way to create a domain record that would function as an inbound IP allow list, to be used in firewalls? Essentially creating a HTTPS ingress proxy.
Example:
FQDN
IP Range
allowlist.bob....
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0
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41
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DNS server set after using wireguard on MacOS
I have installed wireguard via Homebrew, saved the config file /usr/local/etc/wireguard/wg0.conf containing lines like (obtained from Uni)
[interface]
Address = 1.2.3.4/32
PrivateKey = abc123
DNS = 3....
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0
answers
24
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Move Nameserver from crashed BIND servers (DNSSEC Enabled)
The situation basically is:
The BIND servers that are authoritative for a domain crashed and are utilizing DNSSEC (Ie; I can't change the DNS entries for the zone), is it enough to have the registrar ...
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0
answers
32
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How to Set Up a Server to Route Local and Global Requests to Different Web Servers (Server1 and Server2)
I have 2 Servers (Server1 & Server2) where is each one should have a web application on its own
and I have a centralized server (for example DNS Server)
The Centralized server receives a URL ...
- 11
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0
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117
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DNS configuration using bind9
I am currently encountering DNS configuration issues with bind9. I have installed bind9 and made the following adjustments to the configuration files:
In the "named.conf.options" file, I ...
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136
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Why are my DNS query responses from Technitium failing to make it back to my kubernetes container?
I've explored every nook and cranny I can imagine, and I can't figure out what's going wrong.
I've got a k3s setup on my server where I'm hosting technitium in hostNetwork mode. Technitium is ...
- 1
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81
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DNS record not resolving - even on the server itself? Causing AD issues
I have a Windows Server 2019 AD/DHCP/DNS/SQL server running on an ESXi host. Recently, I have been having trouble with domain trust dying to client machines, and now I am completely unable to join new ...
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1
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65
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Active directory server set up DNS resolution failure or VERY SLOW, can I route external DNS requests the traditional way, before the server existed?
I'm very new to the world of active directory, windows server etc., so I apologise if some of the questions I ask are a bit stupid, but I'll try and explain exactly what I want to do below, and my ...
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2
answers
128
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Domain transfer : what should I transfer from one DNS provider to another?
I need to transfer my domain from a [registrar + DNS provider + email provider] (gandi.net) to another. I understand that, to prevent downtime, before actually doing the transfer, I must first copy ...
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70
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How to use dnsmasq in another docker container as a DNS server?
I need to create a local DNS server just for containers, for whitelist domain addresses.
dnsmasq.conf
port=53
domain-needed
bogus-priv
bind-interfaces
no-resolv
strict-order
server=/google.com/8.8.8....
- 11
0
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0
answers
47
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Unable to nslookup any public website from docker container on ubuntu
I'm unable to dns resolve any public hostname from inside docker container running on Ubuntu:
e4e6b07dafb0:/# traceroute google.com
traceroute: bad address 'google.com
Tried to run the container with ...
- 157
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1
answer
27
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How Windows Host can access Guest OS by name
The host OS is Windows, Guest OS is Linux running on VirtualBox. I setup Network and can access the Guest OS from the Host by IP address. Let's say this is IP 192.168.22.10. This part makes sense ...
- 103
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0
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48
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DNS resolution failure when resolv.conf has nameserver value as 127.0.0.1
We have an application hosted in 2 ec-2 instances. In an AWS Route 53 record of A type, the domain is mapped with the IP addresses of those 2 servers. From one of the local VM in our office network, ...
3
votes
1
answer
635
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SPF record in DNS sending via Gmail
I have an old domain that I want to re-purposes for a new website which will send emails. I'm using Asp.Net Core, if that makes a difference (I do not think it does). I've written several apps that ...
- 131
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2
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175
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Why isn't `nslookup` able to resolve an A record in route53, when I specifically use a nameserver from my hosted zone?
I'm trying to host a static website in s3. I have a domain registered with namecheap, and it is pointing at route53 nameservers. This part seems to be working correctly based on dig:
dig getgargoyle....
- 11
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votes
0
answers
47
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Ngnix dynamic reverse proxy for multiple domain names.How to do it?
Referring to the following three websites, you can input any website in the input box, such as: enter www.google.com, search results, click on any content, and it will be reverse proxied. What is the ...
1
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0
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32
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Can I add a Trust Anchor for a specific domain?
Some TLDs unfortunately still don't support DNSSEC all the way to the root. However, is it possible to add a specific DNSKEY to my resolver (currently using knot-resolver) so that a signed zone can ...
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