How to flush the DNS Cache on a variety of platforms
How to flush the DNS Cache
Clear Chrome DNS Cache
Chrome has internal DNS Cache, separate to the operating system
# Browse to... chrome://net-internals/#dns and click 'Clear host cache'
# Browse to... chrome://net-internals/#sockets and click 'Flush Socket Pools'
Clear Dnsmasq DNS Cache
sudo killall -SIGHUP dnsmasq
Clear Firefox DNS Cache
# Browse to... about:config and set network.dnsCacheExpiration to 0 and then back to the default (usually 60)
Clear Windows DNS Cache
Clear PowerDNS Recursor DNS Cache
# A specific FQDN
rec_control wipe-cache <domain>
# A specific FQDN and anything under it i.e. *.domain.com
rec_control wipe-cache <domain>$
# All records
rec_control wipe-cache $
Clear BIND DNS Cache
- Type:lookupd -flushcache
- Hit the return key and the process is complete.
- The Terminal window can be closed.
We would then ask you to check your network connection settings on your machine, ensuring the DNS server addresses are manually set, as this specifies exactly where your machine looks to resolve site names:
For IC.UK customers, these are available here :
It may also be worth trying an alternative web browser like Firefox, to negate any possible issues with your current browser, eg. Internet Explorer.
If you are still having trouble browsing websites or one particular site, open up your internet browser and surf to a website which is NOT the one you need to access. Close down the other tabs if you are using tabbed browsing. Now clear your internet browser cache - inInternet Explorerthis is done throughTools->Internet Optionsthen choose "Delete browsing history". Remove everything you can from here. InFirefoxchooseTools->Clear Private Data.