This guide explains how to resolve access errors to your Web Hosting following an IP address change (server migration, for example).

Introduction

• To save time, your system maintains a table that maps domain names to IP addresses.
• If the website changes its "location" (IP address), your computer tries to access the old address.
• Clearing the cache forces the system to request the new address from the DNS servers.

Clear the DNS cache…

… on Windows

Use the command prompt to refresh your network settings:

1. Open the Start menu.
2. Type cmd and press Enter.
3. In the black window that opens, type the following command and press Enter: 
   ipconfig /flushdns

… on macOS

On recent versions of macOS, the process is done via the Terminal:

• Open the Terminal (via Spotlight or Applications > Utilities).
• Copy and paste the following command:
  sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
• Enter your session password (it will not be displayed while typing) and validate.

… on Linux

Most modern distributions use systemd-resolved. Open your terminal and run:

• sudo resolvectl flush-caches

Note: If you are using an older service, the commandsudo systemctl restart nscd remains valid.