20.02.17

How to Flush / Delete DNS Cache in Firefox, Chrome

How to Flush / Delete DNS Cache in Firefox, Chrome



How to Flush / Delete DNS Cache in web browser Firefox, Chrome, Vivaldi, Opera, Edge, Safari, Apple, Linux ...


Clear the DNS Cache

Firefox    

DNS Flusher Add-on
A Mozilla Firefox add-on that provides a easy way to reload the browser DNS cache. It's commonly used by developers that uses the Hosts File to force a domain name resolution to a specific IP
How to use it
or

Click on Firefox at the top left of your browser, go to the History menu, select Clear Recent History
and check all boxes.
Under Time range to clear select Everything (except passwords, if desired) and click Clear Now



Chrome

chrome://net-internals/#dns
Click Clear host cache

chrome://net-internals/#sockets
Click Close idle sockets, and then click Flush socket pools

Clearing the DNS Cache on Computers and Web Browsers
or
Expand the Wrench Icon in the upper right corner and select History and check all boxes.
Under Clear data for this time period, select Everything (except passwords, if desired) and click Clear Browsing Data



Windows10 and Windows 8 and 8.1

Press the Windows Key or hover your mouse over the bottom left corner and click the Windows Icon Begin typing Command Prompt
Right-click the application and select Run as Administrator
Run the following command in the command line and hit enter

ipconfig /flushdns



Linux

If you are running the nscd Name Service Cache Daemon and wish to flush your DNS cache, then you will need to do the following.

Open up a command terminal (either as root or run step 2 with sudo).
Run the command /etc/init.d/nscd restart



Apple OS X

Click the Terminal icon in the dock or in Finder under Application/Utilities/Terminal

Run the following command in the command line and hit enter

Mac OS X    10.04 - Tiger
lookupd -flushcache

Mac OS X    10.05 - 10.06  -  LEOPARD
dscacheutil -flushcache

Mac OS X    10.07 - 10.08 - LION
sudo killall -HUP mDNSResponder

Mac OS X    10.6 - Snow Leopard
sudo dscacheutil -flushcache



Windows 7

Press the Windows Key or hover your mouse over the bottom left corner and click the Windows Icon Begin typing Command Prompt
Right-click the application and select Run as Administrator
Run the following command in the command line and hit enter

ipconfig /flushdns



Firefox

Clear DNS cache in Firefox

When I try to hit a server inside my company’s network while the VPN connection is down, it obviously fails and because I’m using OpenDNS every hostname resolves to an ip-address (in this case an ip-address of a server at OpenDNS). I connect to VPN and then reload the page in Firefox and the same error page shows up. The reason for this behavior is Firefox’s internal DNS cache. The only remedy at that point is to close Firefox and restart it, which clears the in-memory DNS cache.


However, there’s a solution that does not require a restart.

1. type about:config in Firefox’s address bar
2. acknowledge the warning that appears next
3. find an entry called network.dnsCacheExpiration and set it’s value to 0
4. if there’s no such entry, create a new integer item with the name above and a value of 0
5. now go back and change the value to 3600


In step 3 (or 4) we tell Firefox that the expiration time for DNS cache is 0 seconds, which means that cache entries expire immediately, essentially clearing the existing cache. In step 5 we go back to the standard 3600 seconds (1 hr) cache expiration. The net effect of these steps is an empty DNS cache, meaning that the next time you hit the trouble server above, Firefox will attempt to resolve the hostname to an ip-address...






Flush DNS

How to change your DNS



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