![]() How do you know if you need to flush your DNS cache? If this occurs, then the cache needs to be cleared for your system to know how to communicate with the new server. For this reason, issues may arise if DNS changes to domain names DNS configuration have been made and your system has a cached result which is not yet due for renewal. The TTL of DNS records are configured by the domain administrator and can be anywhere from a few minutes up to 3 days or even longer in some cases. Your device will not attempt to check for an updated record from the DNS server if this time has not yet expired. The amount of time that a result is cached on your local device is known as the TTL (Time-to-Live). Sometimes old results will be cached for a long period of time and your device will continue to try communicating with the IP address of the old result even though they may have since been changed, this can often result in you not being able to access a website, game server, or other online service as you would expect. These devices will automatically cache IP addresses and other DNS records when they perform a DNS lookup request the first time you visit or use them.ĭNS results are cached in order to speed up subsequent requests to the same website or service without needing to perform an additional DNS lookup. DNS records are stored locally in a cache on your computer, phone, tablet, or even smart TV. ![]()
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