DNS problems after updating to Mountain Lion (10.8)

wouteronline · Jul 26, 2012, 04:10 AM

Just updated my Macbook Pro to Mountain Lion, but I am experiencing some problems with DNS resolving (i think).

Some websites (for example Facebook, Google Adwords, Apple discussions) are not reachable through the browser (Google Chrome) most of the time. However if I ping them (using networking tools from OSX), they always respond. They never open in Chrome and sometimes in Safari and Firefox.

The browsers tell me there is no or an empty response.

I already checked the DNS servers (they are ok) and also flushes the DNS cache.

I did not have this problem before upgrading. Can anybody help me out?

Alameda · Jul 26, 2012, 06:22 AM

I had this problem at work today, but that was before I upgraded to ML. While traveling last week, I entered 8.8.8.8 as the DNS server in the Network configuration. Although I can ping this DNS server at work, it was not compatible with our company's firewall. Deleting the 8.8.8.8 DNS server entry solved the problem. However, the problem was that I couldn't reach websites and I don't think I could even ping them, although I could ping 8 8.8.8

Another time, I had a problem more like yours -- only a few websites would load, most wouldn't, but I could ping them by name. I solved this by turning off the osx firewall. Doing so resolved the problem instantly.

wouteronline · Jul 26, 2012, 06:26 AM

Quote:

Originally Posted by Alameda

I had this problem at work today, but that was before I upgraded to ML. While traveling last week, I entered 8.8.8.8 as the DNS server in the Network configuration. Although I can ping this DNS server at work, it was not compatible with our company's firewall. Deleting the 8.8.8.8 DNS server entry solved the problem. However, the problem was that I couldn't reach websites and I don't think I could even ping them, although I could ping 8 8.8.8

Another time, I had a problem more like yours -- only a few websites would load, most wouldn't, but I could ping them by name. I solved this by turning off the osx firewall. Doing so resolved the problem instantly.

Thanks for your reaction. The first part of your story isn't applicable to my situation. I do also have 8.8.8.8.8 as my DNS server. But most sites work, and I can ping the sites that don't.

I checked out my firewall but it was already disabled, so that can't be it.

wouteronline · Jul 26, 2012, 08:17 AM

I discovered a strange thing. When I delete all FB cookies, the site loads. When I log on (and tap the box for staying logged in, therefore placing a cookie), the doesn't work anymore. Same is with Google.

wouteronline · Jul 26, 2012, 11:35 AM

Another discovery for my problem. Today I was at work, now I'm home and the problem is gone. I believe it is related to the network there. Our internet access is pretty much straight on to the router, however there is a Windows Domain active on the network for file sharing.

Can anybody help me out?

wouteronline · Jul 27, 2012, 06:48 AM

By uning the app "Charles" I run some diagnostics over the connection through FireFox. The following note caught my attention:

"SSL Proxying not enabled for this host: enable in Proxy Settings, SSL locations"

In the OSX settings are proxy protocols are disabled. Also, other SSL/HTTPS sites are working fine.

I'm starting to believe it has got something to do with a SSL connection. This is also ratified by the fact Outlook can't send a message to the Gmail server (time out) using SSL (port 465). However, I can send mail through other SSL servers using the some port.

chrisgreasy · Jul 29, 2012, 08:50 AM

Quote:

Originally Posted by wouteronline

I discovered a strange thing. When I delete all FB cookies, the site loads. When I log on (and tap the box for staying logged in, therefore placing a cookie), the doesn't work anymore. Same is with Google.

I'm having the exact same problem, anyone find a fix yet?

bravo123 · Jul 29, 2012, 02:08 PM

uploaded to ML 2 days ago and expriencing the exact same ****. pages like facebook and apple disscussions just hangup loading. removed the cahes but no success...need to fix this crap. help reqd..

have someone posted this issue at apple disscussions?

Alameda · Aug 1, 2012, 06:45 PM

Do this if you need to, of course, but it will slightly reduce your network speed, so only do if necessary.

gpessel · Aug 7, 2012, 03:51 PM

I have a mbp, 64 bits and tried all the above mentionned solutions but unfortunately without succes. In the office everything works fine, at home i do have connection but it won't open any webpage.

Jul 26, 2012, 04:10 AM	#1
wouteronline macrumors newbie Join Date: Jul 2012	DNS problems after updating to Mountain Lion (10.8) Just updated my Macbook Pro to Mountain Lion, but I am experiencing some problems with DNS resolving (i think). Some websites (for example Facebook, Google Adwords, Apple discussions) are not reachable through the browser (Google Chrome) most of the time. However if I ping them (using networking tools from OSX), they always respond. They never open in Chrome and sometimes in Safari and Firefox. The browsers tell me there is no or an empty response. I already checked the DNS servers (they are ok) and also flushes the DNS cache. I did not have this problem before upgrading. Can anybody help me out?
	0

Jul 29, 2012, 02:08 PM	#8
bravo123 macrumors newbie Join Date: Jul 2012	DNS problems after updating to Mountain Lion (10.8) uploaded to ML 2 days ago and expriencing the exact same ****. pages like facebook and apple disscussions just hangup loading. removed the cahes but no success...need to fix this crap. help reqd.. have someone posted this issue at apple disscussions?
	0

Aug 7, 2012, 03:51 PM	#10
gpessel macrumors newbie Join Date: Aug 2012	Tried it all I have a mbp, 64 bits and tried all the above mentionned solutions but unfortunately without succes. In the office everything works fine, at home i do have connection but it won't open any webpage.
	0

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Jul 26, 2012, 06:22 AM	#2
Alameda macrumors 6502 Join Date: Jun 2012	I had this problem at work today, but that was before I upgraded to ML. While traveling last week, I entered 8.8.8.8 as the DNS server in the Network configuration. Although I can ping this DNS server at work, it was not compatible with our company's firewall. Deleting the 8.8.8.8 DNS server entry solved the problem. However, the problem was that I couldn't reach websites and I don't think I could even ping them, although I could ping 8 8.8.8 Another time, I had a problem more like yours -- only a few websites would load, most wouldn't, but I could ping them by name. I solved this by turning off the osx firewall. Doing so resolved the problem instantly.
	0

Jul 26, 2012, 08:17 AM	#4
wouteronline Thread Starter macrumors newbie Join Date: Jul 2012	I discovered a strange thing. When I delete all FB cookies, the site loads. When I log on (and tap the box for staying logged in, therefore placing a cookie), the doesn't work anymore. Same is with Google.
	0

Jul 26, 2012, 11:35 AM	#5
wouteronline Thread Starter macrumors newbie Join Date: Jul 2012	Another discovery for my problem. Today I was at work, now I'm home and the problem is gone. I believe it is related to the network there. Our internet access is pretty much straight on to the router, however there is a Windows Domain active on the network for file sharing. Can anybody help me out?
	0

Jul 27, 2012, 06:48 AM	#6
wouteronline Thread Starter macrumors newbie Join Date: Jul 2012	By uning the app "Charles" I run some diagnostics over the connection through FireFox. The following note caught my attention: "SSL Proxying not enabled for this host: enable in Proxy Settings, SSL locations" In the OSX settings are proxy protocols are disabled. Also, other SSL/HTTPS sites are working fine. I'm starting to believe it has got something to do with a SSL connection. This is also ratified by the fact Outlook can't send a message to the Gmail server (time out) using SSL (port 465). However, I can send mail through other SSL servers using the some port.
	0

Aug 1, 2012, 06:45 PM	#9
Alameda macrumors 6502 Join Date: Jun 2012	Do this if you need to, of course, but it will slightly reduce your network speed, so only do if necessary.
	0