HTTP Error Code 304 technically means redirection. When you get the unmodified HTTP 304 error in the browser, such as Chrome, Firefox, or Edge, there are several reasons for this error. The DNS has a problem or the cache is reusing existing information to find a website or your browser is infected. In this guide, we’ll help you resolve HTTP Error 304 Unmodified when you can not access the web page you’re trying to view. The exact detail of the HTTP Error (304) Not Modified error is:
This status code is returned if the client has already downloaded resources since the last visit and is displayed to notify the client browser that the requested resources is already stored in the browser cache which hasn’t been modified.
Solution 1: Clear Browsing Data
Depending on which browser you use, follow the links to clear your browsing data, cookies, and cache.
- Clear Browsing and Cache on Chrome & Firefox
- Clear Browsing and Cache on Edge
Solution 2: Flush DNS and reset TCP/IP
In case the issue is not with the browsers (a case which has been isolated in the above explained solutions), try flushing the DNS and resetting the TCP/IP. The procedure is as follows:
1] Search for Command Prompt in the Windows search bar and right-click on the option. Select Run as administrator.
2] Type the following commands one by one and press Enter after each command:
netsh int ip reset resettcpip.txt
3] Restart the system once the commands have executed.
Solution 3: Use Google’s public DNS address
One of the causes of the error is a messed up DNS address. Here’s how to change the same.
1] Press Win + R to open the Run window and type the command ncpa.cpl. Press Enter to open the Network Connections window.
2] Right-click on your Network connection and select Properties.
3] Double-click on the option Internet Protocol Version 4.
4] Shift the radio button for DNS options to Use the following DNS server addresses.
5] Use the following values for the preferred and alternate DNS server address:
6] Click on OK to save the settings and restart the system.