Safari DNS problem in Yosemite? Works, then slow death...

Same problem for me, before updating to Yosemite I cloned my Mavericks disk to an external drive, if I boot from that disk I am in Mavericks and the problem is gone, if I boot in Yosemite the problem re occurs. So I know the problem is not with my ISP it is somewhere in Yosemite...

Also, having slow and fail to connect issues on Safari 8.0 on Yosemite 10.10 on a 2014 Mac Book Pro retina.

The problem is clearly with Safari 8.0 on Yosemite. I’m having no issues with page loads or connections on Firefox.

Tim, please fix this! I do not like that my Mac is starting to remind me of when I was on Windows. ;-)

Experiencing the same, but mine appears to happen after I connect to our corporate VPN. It seems Safari isn't correctly picking up the DNS changes.

Chrome/Firefox have no issue. Restarting Safari after connecting/disconnecting seems to solve things. Still keeping an eye on things to see if I can determine a solid pattern.

+1

Problem Safari with work DNS, I used different connection as PPPoE/PPTP/L2TP/WiFi/direct connection.

I have problem anyway. Problem was in GM and is in release.

ping - success

nslookup - success

but Safari 8.0 freezes.

I tried different DNS servers, as private and open.

21:51:58.832253 IP 10.1.2.2.62238 > 10.1.255.253.53: 57628+ AAAA? www.libreoffice.org. (37)

21:51:58.832381 IP 10.1.2.2.57490 > 10.1.255.253.53: 3419+ A? www.libreoffice.org. (37)

21:51:58.853542 IP 10.1.255.253.53 > 10.1.2.2.62238: 57628 1/6/8 AAAA 2a01:4f8:130:61e7::2 (379)

21:51:58.853850 IP 10.1.255.253.53 > 10.1.2.2.57490: 3419 1/6/8 A 213.133.123.169 (367)

21:52:06.676936 IP 10.1.2.2.60743 > 10.1.255.253.53: 48487+ AAAA? p03-keyvalueservice.icloud.com. (48)

21:52:06.677034 IP 10.1.2.2.59157 > 10.1.255.253.53: 24581+ A? p03-keyvalueservice.icloud.com. (48)

Answers from my DNS right. but Safari doesn't open libreoffice.org

May be something with IPv6? How to switch it off?

Please check it, I removed all ipv6 addresses and Safari started to work OK.

To remove ipv6 addresses:

sudo ifconfig en0 inet6 2002:5bcf:731a:b:12dd:b1ff:feb3:9014 delete

where "2002:5bcf:731a:b:12dd:b1ff:feb3:9014" your addresses which you find when make:

"ifconfig | less" for your local interface (I have en0)

For some unknown reason, I had 2 IPv6 and 2 IPv6 router addresses 😟

i suspected same issue.. ipv6 and dns implementation bug with yosemite.. so rather than using ifconfig to delete the ipv6 address.. just go into network preferences -> advanced -> tcp/ip now just change the settings for configure ipv6 to link-local only. "ok" "apply" close preferences.. logout user.. log bcak in.. shouldn't use v6 anymore (embarrassing apple).. you will definitely put this back to auto whenever apple fixes this since the internet is transitioning to ipv6 and you'll want to be a part of that transition...

I've been having this issue as well which has been super frustrating to me as an online college kid.

I can confirm that for at least the time being, this has solved my issue beautifully! I hate that I have to disable ipv6, but at least I can use my rMBP again without wanting to throw something across the room.

I was having DNS failure on a clean-install of Yosemite, mid 2010 21.5 iMac. The ipv6 suggestion (thanks kirush and ron2you) has solved my issues for now.

Carolyn, thank you!!!

I've been having this problem since running Yosemite beta testing. I'd provided feedback on it.

Your suggestions did it for me:

From your Safari menu bar click Safari > Preferences then select the Privacy tab.

Click: Remove All Website Data

Then delete the cache.

Open a Finder window. From the Finder menu bar click Go > Go to Folder

Type or copy paste the following

~/Library/Caches/com.apple.Safari/Cache.db

Click Go then move the Cache.db file to the Trash.

I gave up today waiting for Apple to fix this problem. Loaded Chrome as much as I did not want to but it does seem to have "fixed" the problem. Now my streaming audio works. It is clearly in the DNS stack and the hand off to Safari being sandboxed until it times out or you fall out of your chair asleep waiting.

None of the suggested solutions worked for me. Using Chrome..... waiting for a solution from Mac....

If I don't remember wrongly, it was exactly the same when Mountain Lion was released. We had to use Chrome and Fireflop for a long time until Apple admitted there was a bug and fixed it.

Having said that, I cleared my Safari cache as adviced earlier in this thread and so far I have no problems.

I have experienced exactly the same problems and tried every suggestion - without success.

However, I shut down and restarted (not restart) and everything is working perfectly now ...... for how long, who knows, but I've tried al the same web-sites I was having problems with, opened multiple tabs etc. without any perceivable degradation in performance.

By the way, I always knew the problems weren't with the web-sites or my WiFi or my ISP as I've never had any problems with my iPhone, iPad or Windows PC.

I read all previous posts and they all suggest Safari slows down from normal use. For me, browsing is ok, as after I start downloading media files (voice or video), download will eventually cease and browsing will not work either. Restart Safari will correct it but files can never finish download.

So it seems my problem is specific to download function.

seemed interesting, but no change for me. 2 of 6 systems on our network updated to Yosemite are experiencing this problem.