IIS Works by IP but Times Out When Using the Internal DNS Name
We have an IIS website hosted on a server in a DMZ. External users can access it normally, and internal DNS is configured with split-horizon DNS so the…
DNS troubleshooting
Connected to Wi‑Fi, but nothing online works on my laptop
My laptop connects to my Wi‑Fi network, but web pages and other internet-based programs will not load. Network diagnostics say the connection is fine, and I have already…
One AnyConnect User Cannot Resolve Internal Hostnames While VPN Is Connected
A user working from home connects successfully with Cisco AnyConnect and can browse the internet normally. She can also reach internal systems by IP address, but internal applications…
Windows 11 Can Ping IP Addresses but All DNS Requests Time Out
My Windows 11 desktop can reach raw IP addresses, but it cannot resolve or ping any hostnames, so webpages and internet services are unavailable. The problem happens over…
Some websites work on my laptop, but others fail over home Wi‑Fi
My laptop connects to my home Wi‑Fi, but services such as Spotify, Roblox, and several websites either fail to load or work inconsistently. Other devices on the same…
Why do some websites and services fail only on my laptop’s home Wi‑Fi?
My laptop connects to my home Wi‑Fi, but services such as Spotify, Roblox, and several websites either fail to load or stop working. The same network works normally…
Why did DNS break after demoting one of our domain controllers?
We have two domain controllers, and both also host DNS. The first controller runs DHCP, while the second was intended to act as the backup. We had to…
Windows 11 PCs Cannot Resolve DNS Names, While Other Devices Work
Two Windows 11 computers are unable to access the internet and Chrome reports `DNS_PROBE_FINISHED_NO_INTERNET`. The problem occurs across browsers, Ethernet cables, network ports, TP-Link devices, and even a…
One Computer Cannot Resolve Websites While Other Devices Work
Every website fails to load on this computer with a DNS address error, but other devices connected to the same Wi‑Fi work normally. I have already tried setting…
One Computer Gets DNS Errors While Other Devices Work Normally
Whenever I try to open a website on one computer, I get a DNS address error and the page will not load. Other devices connected to the same…
Is this a routing problem or a DNS configuration problem?
I have several DNS servers across multiple networks, including a BIND master at 192.168.0.200, Active Directory DNS servers at 192.168.0.225 and 10.1.1.250, and a BIND resolver on a…
Why Is Nginx Serving Unexpected Content Even Though DNS Points to My Server?
My domain is hosted on a bare-metal Debian server, and DNS still resolves to the server's public IP. A few months ago, changes to the site stopped appearing…
Windows 11 Connects to Phone Hotspot but Internet Access Is Unreliable
My Windows 11 PC connects to my phone's mobile hotspot and shows the connection as connected and secure, but internet access is inconsistent. Mobile data works normally on…
How can I stop Windows 11 from repeatedly querying DNS for WPAD?
Windows 11 computers on my network keep generating DNS queries for WPAD, apparently about every ten minutes. I have already tried disabling automatic proxy detection, setting WPAD-related registry…
How can I stop Windows 11 from repeatedly querying DNS for WPAD?
Windows 11 machines on my network keep generating DNS queries for WPAD roughly every few minutes. I have already tried disabling automatic proxy detection, setting WPAD-related registry policies,…
How Could I Have Diagnosed This Docker DNS Failure Sooner?
I'm fairly new to Docker and spent most of a day debugging a containerized web app. The frontend was running in a Caddy image on a DigitalOcean droplet,…
Windows 11 Shows No Internet, but Ping Works and cURL Fails
My Windows 11 PC says it isn't connected to the internet in Settings, but I can still ping websites such as Google from Command Prompt. However, cURL requests…
How could I have diagnosed a container DNS failure sooner?
I'm fairly new to Docker and spent most of a day debugging a web app that I was containerizing. The frontend was running in a Caddy container on…
Git pull fails after unrelated histories error
I'm trying to push changes to a remote repository after running `git status`, `git add .`, and `git commit -m "fifth commit"`. The repositories had different histories, so…
Why can I access Google but not most other websites or apps?
For the past day or two, every device on my home network has shown a no-internet warning, even though Google Search, Gmail, YouTube, Wikipedia, and a few other…