Jun 29, 2020 A DNS cache or DNS resolver cache, is a temporary database of DNS lookups on the OS and browser. It consists of the records of recent as well as attempted visits of websites along with domains. To troubleshot cache poisoning or other internet connectivity issues, you may need to flush the DNS cache. The action will remove all the DNS entries.
- Fix Dns Error Windows 10
- Dns Zone File Lookup
- Fix Dns Lookup For Os X 1
- Fix Dns Lookup For Os X 2
- Fix Dns Lookup For Os X Download
Fix Dns Error Windows 10
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Dns Zone File Lookup
Directory Service is responsible for maintaining the DNS cache on Leopard & Snow Leopard. Tools like dig, nslookup don't consult the cache, so they could be getting the records from the DNS servers not the cache.
FWIW you can do the following in Terminal to clear the cache - no reboot required.
sudo dscacheutil -flushcache
Admin permission is required.
FWIW you can do the following in Terminal to clear the cache - no reboot required.
sudo dscacheutil -flushcache
Admin permission is required.
![Lookup Lookup](/uploads/1/2/6/5/126536356/570521775.png)
Edited on Dec 21, '09 10:18:51AM by Chealion
I've seen this exact same issue with 10.6 with both of my machines (Mini and MBP) showing this problem.
Since I'd changed the local DNS settings on the Mini and the DNS server advertised out on DHCP (to the MBP) to be only the BIND on the Mini, I've not had any resolution problems.
Since I'd changed the local DNS settings on the Mini and the DNS server advertised out on DHCP (to the MBP) to be only the BIND on the Mini, I've not had any resolution problems.
Had the same problem with only one Mac and the same solution.
Fix Dns Lookup For Os X 1
I've been having the exact same issue communicating with my Windows Home Server on my 13-inch MPB since I updated to snow leopard. Upon further testing I've identified that the server is failing to ARP my Mac's MAC address. I still haven't figured out why, but if I add a static MAC entry on the server, it works.
Fix Dns Lookup For Os X 2
I had the same problem in Leopard (10.5). I could get DNS on the shared internet connections to resolve right after boot but then sometime later it would stop. I 'fixed' this problem by upgrading to snow leopard (10.6). Now the problem is gone.
I had this same problem after upgrading my MacBook Pro to Snow Leopard (but not by Mac Pro or iMac). I determined that using the campus' DNS server (which is BIND) caused the DNS resolution to go wonky seemingly at random. Pointing to OpenDNS DNS servers fixed the problem on the laptop. I did report this to Apple and even after escalating it several stages and running Apple's diagnostic software for them to collect data from my machine, we could not find the root cause. I suspect some incompatibility between some version of BIND and how Snow Leopard does its DNS caching. See more details on the error in my blog post (look at the section on 'Ethernet Issues').
Fix Dns Lookup For Os X Download
I had the same issue on three of my laptops that were upgraded to 10.6 in various places, at home, at my friends house.
I tried the following (with no success)
* Reset my router
* Reset my cable modem
* Disabled WPA/WEP protection
* Changed security protocol from WEP to WPA/WPA2
* Switched wireless channels – pick a channel no neighbor is using.
* Turned Airport on & off (via menu or Network preferences)
* Deleted and then recreate/reestablish wireless network connection
* Created a new Network Location
* Made sure your router firmware and Airport card firmware is up to date
* Zaped the PRAM on your Mac (hold Command+Option+P+R on restart)
* Flushed the DNS cache using the Terminal command: dscacheutil -flushcache
* Deleted the com.apple.internetconfigpriv.plist and com.apple.internetconfig.plist files from ~/Library/Preferences
* Trashed my home directories SystemConfiguration folder and reboot
* Reset my Mac’s System Management Controller (SMC)
All those steps have helped a bit, but problem remained.
After all it turned out that thorough troubleshooting DNS settings in the routers fixed it.
My conclusion that it is a collective fault of IPS, router makers and Apple, who never tested their stuff well. The problem is really widespread, I found hunderds of calls for help from desperate snow leopard users.
I tried the following (with no success)
* Reset my router
* Reset my cable modem
* Disabled WPA/WEP protection
* Changed security protocol from WEP to WPA/WPA2
* Switched wireless channels – pick a channel no neighbor is using.
* Turned Airport on & off (via menu or Network preferences)
* Deleted and then recreate/reestablish wireless network connection
* Created a new Network Location
* Made sure your router firmware and Airport card firmware is up to date
* Zaped the PRAM on your Mac (hold Command+Option+P+R on restart)
* Flushed the DNS cache using the Terminal command: dscacheutil -flushcache
* Deleted the com.apple.internetconfigpriv.plist and com.apple.internetconfig.plist files from ~/Library/Preferences
* Trashed my home directories SystemConfiguration folder and reboot
* Reset my Mac’s System Management Controller (SMC)
All those steps have helped a bit, but problem remained.
After all it turned out that thorough troubleshooting DNS settings in the routers fixed it.
My conclusion that it is a collective fault of IPS, router makers and Apple, who never tested their stuff well. The problem is really widespread, I found hunderds of calls for help from desperate snow leopard users.