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Questions tagged [dns]

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For questions pertaining to Domain Name System (DNS), a service that provides the resolution of host names to IP addresses. Use this tag when you are troubleshooting DNS issues, configuring a DNS resolver or server, or are trying to understand DNS's involvement in your situation.

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I got a small setup with two private servers ps1 and ps2 at home behind a NAT. One server s1 with public domain s1.com is a small rented vps where I set up as reverse proxy with caddy. On ps1 I had a ...
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I migrated from a Windows DNS server to Bind9 this year. Both were configured as split DNS for local servers, and recursive for public servers (not forwarding). About once or twice a day now, I get ...
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Just in theory: is it possible to replace the domain string in the compiled binary file with an IP address by editing a binary file in place with sed? (IP address belongs to a different domain, but ...
fxgreen's user avatar
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On one of my linux machines the BIND package is not installed. The Bind package provides a lot of terminal tools like host -v, nslookup, dig, etc. If I want to have shell tools or command-line tools ...
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I have cPanel & WHM v130.0.14 STANDARD running in an EC2 instance. Trying to setup a reverse proxy with Apache2 by setting a CNAME some.example.com (not the real one) to forward the request to api....
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I've run into a really weird issue while switching a docker build from a debian base image to an alpine base (FROM python:3.12-slim-bookwork, to FROM python:3.13-alpine). I suddenly get very weird DNS ...
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We configured Unbound on a RHEL-based server ( RHEL 7.9 ) to provide DNS caching. Here’s the relevant part of our /etc/unbound/unbound.conf: server: chroot: "" verbosity: 1 port: ...
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I have a SBC and I configured it to have 1 AP and 1 Station mode at the same time on my wifi module as below. Hostapd creates the access point for the interface wlan0 Interface wlan0_sta is created ...
Tibibs's user avatar
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Almost two weeks ago, I set A and NS records on Cloudflare. A record: "tns" as the name and "IPV4 "as the content of the server. NS record: "t" as name and for content &...
lachin's user avatar
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I am using Debian Trixie on a server. I have installed it using ZFSBootMenu documentation, without a desktop environment. The installation is quite minimal in term of packages. My motherboard has 2 ...
Gabriel Devillers's user avatar
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Following instructions, tried to circumvent network censorship. In the instructions, it was said to add these records in the name's register configuration panel and set these: A tns.example.com ...
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I have two hosts, MintPC and AlpineVM. The VM is on a bridged network so it appears as its own device on the network with its own address. Both obtain addresses through DHCP provided by my router/...
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working I installed and setup Bind9 official package to test DNS forward zones based on source IP/subnets which unbound doesn't support I properly set NAT forwards, changed listening ports on Bind9 ...
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I run dnsmasq on a server (specifically OpenWrt) to act as both DHCP and DNS. OpenWrt DHCP configuration /etc/config/dhcp: option readethers '1' list address '/my-phone.lan/172.28.79.133' Which is ...
Livy's user avatar
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I'm trying to configure a reverse proxy on an LXC Container in proxmox, however the container is not able to resolve DNS. The proxmox node has no issue with DNS, and both the node and the container ...
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A strange issue with split DNS that's been annoying me for ages, DHCP dns points to my adguard (primary) and my home router (secondary). Both have DNS rewrites for my local home domain servers to the ...
Michael Kennedy's user avatar
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I set up an opnsense firewall that runs a DHCP server for IPv4 assignment in my LAN. Furthermore, as my ISP provides me with IPv6 too, my LAN clients also configure a SLAAC address with IPv6 prefix ...
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This is on a Debian 12.10 lxc machine. I'm trying to get bind9/named to listen on a second localhost IP: /etc/bind/named.conf.options: options { ...
Harv's user avatar
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On various, mostly security and privacy related reasons, I would be more happy if my caching-only bind9 would only use TCP to make outward connections. Of course, it should be able to accept and ...
peterh's user avatar
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I cannot for the life of me work out why BIND9 is refusing queries. I have followed so many tutorials and watched so many configuration setup videos, both using Webmin and in the CLI, following them ...
skeetastax's user avatar
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Problem: I’m unable to access the internet in my Red Hat 9.5 Enterprise VM, despite the VM having an IP address and being configured in VMware Workstation with NAT mode. The VM's network interface is ...
jonathan's user avatar
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In order to send 2FA emails from a PHP web site to myself, I set up an MX record override and created a firewall rule that allows access to the mail server for the destination domain, but when I ...
SuperAl's user avatar
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I'm seeing a ton of the following two lines in my dmesg logs¹: [602956.308844] [iptables] (10): IN=eno1 OUT=eno2 MAC=xx:yy:..:zz SRC=10.174.26.245 DST=192.168.22.59 LEN=60 TOS=0x00 PREC=0x00 TTL=63 ID=...
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Hi I have a small desktop/home network that local applications aren't able to resolve dns on. For example: dig reddit.com ;; communications error to ::1#53: connection refused ;; communications error ...
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Following Situation: an authoritive DNS Server for zone intranet.local wirh 192.168.0.30 a Client 192.168.0.106 dns cache only server 192.168.0.33 with /etc/bind/named.conf.local: zone "...
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Background Recently, I learned that there is a name Service Switch configuration file - nsswitch.conf in some Unix-like operating systems. We can change the domain name resolution order using nsswitch....
Continuous Improvement's user avatar
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Running user@nextcloudpi:/$ `sudo certbot -d downwind.duckdns.org --manual --preferred-challenges dns certonly~` returned: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
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I have the following system: root@debian:~# dpkg -l systemd-resolved Desired=Unknown/Install/Remove/Purge/Hold | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend |/ Err?=(...
PersianGulf's user avatar
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I am using Kind on my workstation, Kind creates a network bridge for itself and uses it to provide network functionality to its Kubernetes [container] nodes You can see it here: ip route show 172.18....
badger's user avatar
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3 answers
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I have a program that will run a set of commands against new server installs and I need to change an entry in a file for each install. We need to change the default DNS from 127.0.0.X (which it ...
The ScaryJello's user avatar
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I have a dnsmasq server (10.0.0.1) with knowledge of a hostnames and IP addresses for couple of local networks, say a Guest Wireless and Wired Networks. I also have a bind9 DNS running on a separate ...
ealfonso's user avatar
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I have the following problem. I need to send report emails for one of our customers to his customers. Our customer provided an SMTP endpoint for that and added the IPv4 Address of our server to his ...
Pablo's user avatar
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I am running Pi-hole on a Debian server, and need to override the DNS for the network to 1.1.1.1 (so it bypasses Pi-hole). What is the proper way to do this on Debian 12? Adding the DNS to /etc/resolv....
Alex's user avatar
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My Mastodon instance is not showing previews of images from remote servers. I have tried to run RAILS_ENV=production /home/mastodon/live/bin/tootctl media refresh --days 0.2 And get a lot of errors ...
jeppeb's user avatar
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I have setup Pi-hole and some other things on a Debian server, using docker. The pi-hole is acting as a DNS for my entire network (I have added the server's IP in my router DNS config). Problem is ...
Alex's user avatar
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I'm on Arch with KDE. I can't understand my DNS search result latency testing result. My first DNS request always takes much longer than subsequent ones (it's not bad, I'd just like to understand it)...
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I am using MX Linux, without systemd. Sometimes after a while, and every time after sleep or hibernation, domain name resolution stops working, that is ping 8.8.8.8 works, but ping google.com does not....
EPrivat's user avatar
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I'm running a Debian container on my Manjaro host. Until recently, apt update worked fine, but now it only works if I set the network mode to host. Otherwise, the command hangs at "Connecting to ...
Lorenzo Guideri's user avatar
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I have a small home server which is running Ubuntu server 24.10 where I would like to host an own DNS server. Systemd has its own resolve daemon which binds to port 53 which I have disabled by editing ...
Cilenco's user avatar
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I have a laptop that I'm working on, a FreshTomato-based router, and a Raspberry Pi running NixOS, on which I have installed Blocky to try to use it as my DNS server. However, requests from my laptop ...
Vincent's user avatar
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I have looked at various resolve.conf questions on here and other documentation but they're talking about DNS as an external thing, which doesn't help me distinguish in this case. I have a server. ...
Mm-Art-In's user avatar
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After a reboot of my server, I noticed the hostname wasn't resolving. I checked the firewall-cmd to see if mdns/5353/udp was open, which it was. Then, I went to check if Avahi daemon was running, ...
Vesta Tian's user avatar
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I'll preface this by saying that my experience level in Linux is very low, I have plenty of experience with PCs, elementary level network experience, and haven't dabbled with Linux much in the past 15+...
Jaryn Clouatre's user avatar
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I have a weird issue. I have an ESP32 embedded device running an mDNS server which I assign a hostname to. For the record, i've included this code for the ESP32 device below. When I ping this hostname ...
Engineer999's user avatar
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i have a pihole server running in docker compose on my Debian Linux server. i also host a wireguard vpn (also in docker compose) running on the same server. by using the tcpdump command i have ...
Ravi's user avatar
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I have an application which has an mDNS server running on an ESP32 device. Its hostname is esp32-mdns.local. I can ping this hostname from Windows. However, it is not possible from my Ubuntu 22.04 ...
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I have bind9 running for local LAN DNS. I also have an APT caching server. So, I set up an RPZ file to poison certain domain names and have them resolve to my internal caching server instead. Running ...
Harv's user avatar
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I have two DNS servers for different zones: subdomain.example.com (subdomain) example.com (main domain) The goal is to dynamically transfer A records from subdomain.example.com to example.com without ...
Amit's user avatar
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Let us take google.com. If I run: host -t ns com. I get a list of servers that are name servers for .com. E.g. c.gtld-servers.net. I had expected that if I run: host -t ns google.com c.gtld-servers....
Ole Tange's user avatar
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I’m trying to configure WireGuard (WG) inside a Linux network namespace (mynamespace) in such a way that all WireGuard traffic is limited to the network namespace and does not affect the host system’s ...
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