All Questions
Tagged with domain-name-system networking
615
questions
0
votes
1
answer
34
views
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 ...
- 13
0
votes
0
answers
61
views
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-...
- 155
1
vote
0
answers
127
views
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 ...
- 11
0
votes
0
answers
19
views
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
0
votes
0
answers
70
views
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 ...
1
vote
0
answers
70
views
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
1
vote
0
answers
36
views
DHCP and DNS on a custom internal vSwitch?
In Win 11 I've configured in Hyper-V a custom internal vSwitch with NAT as follows:
New-VMSwitch -SwitchName 'VM NAT switch' -SwitchType Internal
New-NetIPAddress -IPAddress '192.168.2.1' -...
- 213
0
votes
2
answers
65
views
Windows DNS Lag and Timeouts
I've recently migrated some 2012 R2 servers to Server 2022, including some domain controllers.
Everything appears to be fine except that one of the VMs is behaving strangely when attempting name ...
- 83
0
votes
1
answer
64
views
Experiment with DNS server resolution DENY policies doesn't work as expected [closed]
I am experimenting with DNS server resolution DENY policies, and it doesn't work as expected. Here is the general idea:
A test non-domain member with no special settings Windows PC with no special ...
- 768
0
votes
0
answers
64
views
ERR_ADDRESS_UNREACHABLE on IPv6
I'm having an issue at some coffee shops that use comcast wifi. These shop only allow ipv6 and it's causing websites to not load with the error ERR_ADDRESS_UNREACHABLE. Some websites work (google.com, ...
1
vote
3
answers
70
views
What is the difference between a query for a TXT record and a query for a TXT record against a particular name server?
For the purpose of implementing an email server, I want to be able to look up a domain's DKIM record.
What is the difference between these two sets of DNS queries? Which should I choose to implement ...
- 19
0
votes
1
answer
145
views
How to alias a URL path to another URL path (apache2)?
I've tried everything. Alias, ProxyPass, different config files (sites-available/000-default.conf, mods-enabled/alias.conf). My issue is simple. I have an apache2 server hosted at xyz.com/name/. I'd ...
- 101
0
votes
1
answer
100
views
Internal network drops connection to our own locally hosted web server on a disjointed network
In time I have my internal network drops all connections to my locally hosted website. After rebooting the web server all internal connections to the website works again, but it is only a matter of ...
- 274
-1
votes
1
answer
321
views
Docker Container DNS slow (~ 4 seconds) with DNS resolver as container
DNS resolution inside all of my Docker containers is consistently slow (slightly more than 4 seconds). From the host, DNS queries are fast, as well as on the rest of my network.
I must admit I did not ...
- 1
4
votes
2
answers
418
views
How widely are SRV records supported?
I've recently learned about DNS supporting SRV records, which identify what port, and what protocol should be used for a given service. For example _http._tcp.example.com SRV should return a port, and ...
- 142
0
votes
1
answer
57
views
Understanding DIG Output for electronics.stackexchange.com
I am trying to understand the workings of the DNS. When I do dig electronics.stackexchange.com, I get the following response (truncated at the bottom for brevity):
; <<>> DiG 9.10.6 <&...
- 101
0
votes
0
answers
30
views
Users can access a certain website on our network but they cannot log in. They can log in on our second network and on any external network
it is my third month as a junior sys admin and my senior is on vacation.
Starting this past Tuesday, users have not been able to log in to a website while on our primary network. The web page loads ...
0
votes
1
answer
197
views
Private IP being used in public DNS [closed]
I recently was working on a problem for a user at work. The basic problem was they had a bank scanner that connects directly to the bank but it wasnt working on our network.
The domain name was usb....
1
vote
1
answer
109
views
How do you set an A record for any shared host?
I'm trying to use an A record to redirect my domain to a separate domain that I own. This process has worked fine with DigitalOcean Droplets -- I just add their IPv4 address in the A record and the ...
- 13
0
votes
0
answers
177
views
CosmosDB with private endpoint causes 'request originated from VNET through service endpoint' error?
I have a Node Js app which interacts with CosmosDB and which is deployed to a private AKS cluster. I was able to connect to Cosmos DB through a service endpoint in the Cluster VNET/subnet for Cosmos ...
- 1
0
votes
1
answer
106
views
Map subdomain to local IP through public IP
I want to map subdomain to local IPs on my machine to achieve a IP for each of my virtual machines.
I know I can setup a DNS on my own machine but that will only resolve the domain on my own machine.
...
- 3
-2
votes
2
answers
258
views
Block IP in DNS Zone File (Instead of Domain)
I'm using bind9 DNS server. I used to block websites using their domain name in RPZ zone file such as:
malicious.example CNAME .
But, I need to block IP rather than domain such as:
192.0.2.4 ...
1
vote
2
answers
2k
views
How to configure DNS for internal domain resolution on Windows Server?
I have a Windows server with a private DNS server for the AD system named office.example.com. The public domain name example.com is managed by a hosting service and points to a public IP address. When ...
- 111
-1
votes
1
answer
142
views
How can I access local resources via the domain name configured in Namecheap from other local machines
So I have my router pointed at a NO-IP DDNS server. That gives me a static domain name for my router (lets say user.hopto.org).
ddns setting on router
I have my nginx reverse proxy and I port forward ...
- 7
0
votes
2
answers
183
views
DNS Not Working Properly After Mulithomed DC Change
After adding a secondary NIC to a Windows Server 2016 DC I went back to remove the secondary NIC from DNS. It had already registered itself with DNS and I only want the server to listen on one NIC for ...
- 101
0
votes
1
answer
129
views
troubleshooting dns resolution, packet dropping, and dig/nslookup
I've been trying to troubleshoot an issue where using a curl lookup command takes a long time (sometimes) and is quick some other time.
TL;DR
Question: how do i troubleshoot further.
Connecting ...
- 11
0
votes
0
answers
60
views
migrating openBSD VM from linux host to linux host messes up name resolution
I created an OpenBSD guest VM on fedora. I migrated the qcow2 image from fedora to rockylinux and used it create a new VM.
virt-install \
--import \
--virt-type=kvm \
--name=...
- 133
0
votes
0
answers
161
views
Wildcard SSL certificate for a custom TLD?
I'm currently operating an intranet with a significant number of services, with each referred to by a domain with a custom TLD.
SearX --> search.companyname
Nextcloud --> files.companyname
As it ...
- 11
0
votes
1
answer
142
views
How to add a computer to a Domain of windows server 2022 runing on AWS EC2
I have Windows server 2022 running in AWS EC2 with the address that the same instance in EC2 generated, this server can be opened perfectly from any location using "Remote Desk
controller" ...
0
votes
1
answer
3k
views
Use container hostname resolution with network=host
I have two docker container.
One is the "backend", the other "connector"..
The connector needs to have its network type set to "host" (To receive udp multicast: ssdp/mdns ...
- 127
1
vote
1
answer
106
views
How to identify which DNS server is in use in Windows OS?
I have a windows 10 machine with two network interfaces.
Interface #1 (LAN Interface)
IP: 10.1.0.5
Gateway: 10.1.0.1
DNS: 10.0.1.2
Interface #2 (OpenVPN)
IP: 192.168.1.5
DNS: 100.0.0.1
Note: My VPN is ...
- 111
-1
votes
1
answer
662
views
Can a DNS server accept queries from both IPv4 and IPv6 clients?
I have a remote BIND9 server with an IPv4 address that clients use for their DNS queries. This is mainly a forwarding server where most queries get forwarded to Google’s DNS servers. This works ...
- 119
0
votes
0
answers
50
views
I can't PING to my Cisco router when I try to access the domain server
I have this network image
I tried to connect the pc1 to the domain (in Windows Server 2012).
To do that I tried to PING from pc1 to the server and that works.
After that I go the pc1(Windows 7) and I ...
- 109
1
vote
2
answers
459
views
DNS Naming clash between TXT Record and CNAME/A-Record
I observed an unexpected behavior in the usage of Azure DNS Zones.
I have the following DNS Records:
_acme_challenge.<mysubdomain1> IN TXT -> any value
* IN ...
- 113
1
vote
0
answers
279
views
RPZ in Bind DNS server not working
I have an external Bind DNS server which is used by a number of remote machines (limited by IP only). The current setup of this server is to act as a forwarding server. I am trying to block certain ...
- 119
1
vote
0
answers
127
views
access local application server from internet and locally
I did set up a few applications on a local server using pihole for local DNS and Traefik for providing SSL certificates. It all runs behind OPNsense firewall. Internet connection is DSL provided by ...
- 11
1
vote
1
answer
969
views
Redirect specific domain on Bind DNS server
I am running a DNS server which is used by remote computers (only specific IP addresses are allowed). I wish to block a few domains by redirecting them to a request form that is hosted on another ...
- 119
0
votes
1
answer
5k
views
How to create SRV record in Linux(Bind9)?
I am able to successfully implement DNS with an A record. Now I want to use that to create an SRV record.
Please help me to write the SRV record. I want "fs1" to be primary and when "...
0
votes
0
answers
111
views
Domains sometimes fail to resolve over proxy
I don't know a lot about networking, so I'm not sure what to do next with this problem I'm having.
There is a machine which I can SSH into, call it box, which does not have access to the broader ...
- 1
1
vote
1
answer
214
views
How to create service/port specific subdomains in OpenBSD vm
I am creating a website in an OpenBSD vm, and I plan to have different services on it that will be pointed to by their respective subdomains (irc.example.com -> example.com:6697, img.example.com -&...
0
votes
1
answer
69
views
DNS behavior / Wireshark
I'm a Cloud Engineer and currently diving into networking and stuff. I have a question, I have the understanding that whenever I go to a site the first thing is DNS. So a DNS request gets sent to a ...
- 1
0
votes
3
answers
119
views
DNS Server - how to differentiate clients?
I am running my own DNS server on a remote machine using Bind9. This server is currently only used by machines that are connected to the same router. The problem that I am having is that as the DNS ...
- 119
1
vote
0
answers
590
views
Why does api.nuget.org not resolve within my docker-compose devcontainer?
I am running Windows Subsystem for Linux v2 with Ubuntu 20.04. Within my WSL I am running a VS Code dev container based on the docker-from-docker-compose container. From within my dev container I ...
- 111
1
vote
0
answers
2k
views
is there a way on Linux to set DNS servers using a cmd line?
I use a script that creates multiple network interfaces with IP adresses. An example of commands used by the script:
ip addr flush eth0
ip addr flush eth1
ip addr add 192.168.1.10 dev eth0 route add ...
- 11
5
votes
1
answer
1k
views
Setting up an Access Point, Raspberry Pi, and Laptop to serve a website in a classroom. "The internet in a suitcase" [closed]
Our trainers experience bad internet connections at some schools. I would like to provide them with a "mobile" (as in take it on the train) version of our platform running on a laptop, which ...
- 153
0
votes
1
answer
323
views
What does 0.0.0.0/0 mean?
For example in an 'allow' statement in BIND or in Chrony config files.
Does allow 0.0.0.0/0 mean allowing any clients or allowing no clients?
My question isn't about the specific programs, but just ...
- 225
1
vote
1
answer
1k
views
Setting global DNS + MAC address settings on a Debian-based Linux distribution with systemd-resolved + NetworkManager
I'm running a Debian-based Linux distribution, specifically Pop!_OS 22.04 (Ubuntu jammy). I'd like to set custom DNS + MAC address settings globally - that is, to be applied to all network connections ...
- 13
0
votes
2
answers
100
views
Is there specificity in DNS?
I own a domain (say, example.com) and wanted to:
automatically update ext.example.com with my public DNS (via a script that will make the update once the ISP-provided IP changes) → this works
...
- 3,617
2
votes
1
answer
1k
views
archlinux: kubernetes - coredns does not work properly
I have installed kubernetes v1.23.0 with Arch Linux as distribution. The cluster consists of a master and a node. Booth systems are KVM based VMs.
When a pod wants to make a DNS query, it gets a ...
- 347
1
vote
1
answer
811
views
Access self-hosted web server from WAN and LAN with FQDN
I have self-hosted web-server in internal network which i can access from external network with FQDN. I would like to access same server from internal network with same FQDN also.
I have configured my ...
- 13