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We've been experiencing connectivity issues. Pre-establish connections work, and using IP's directly does too. Eg:

DANIELs-MacBook-Air-2:~ dani [master] $ ping 173.194.75.94
PING 173.194.75.94 (173.194.75.94): 56 data bytes
64 bytes from 173.194.75.94: icmp_seq=0 ttl=45 time=110.700 ms

But same server using google.com instead.

DANIELs-MacBook-Air-2:~ dani [master] $ ping google.com
ping: cannot resolve google.com: Unknown host

At first I thought it was a DNS problem, so I set the Router DNS and my machine to use:

8.8.8.8 
8.8.4.4
208.67.222.222
208.67.220.220

Which are GoogleDNS servers and OpenDNS servers. So what else can't it be that machines are improperly resolving.

Edit:

Based on comment, I tried resolving and passing in the DNS server directly and still had a timeout:

$ dig @8.8.8.8 google.com

; <<>> DiG 9.8.3-P1 <<>> @8.8.8.8 google.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
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3  
try dig @8.8.8.8 google.com and see what the response is. –  Wesley Mar 21 '13 at 18:19
    
Do you have nscd or something else running that could be caching negative results? –  spoovy Mar 21 '13 at 19:27
    
Are you allowing port 53 udp in/out on your firewall. If the response can't be returned you won't have DNS. –  Matt Mar 21 '13 at 20:39
    
@WesleyDavid Great idea. I still couldn't resolve google. –  daniel Mar 21 '13 at 20:41
    
@matt Yes, is not a firewall issue. Internet works 90% of time. –  daniel Mar 21 '13 at 20:42

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