MacBook Pro 10.6 losing dns service, network connection still functional if you know the ip address.
- by Vincent
MacBook pro connected to a wireless network (not sure about wired) I lose DNS. I still have a functioning connection and as long as I know the ip address of the website, server... for example skype works, ssh name@ipaddress, ....
Things can be working properly and then just quit, Once I was im via skype and lost dns skype continued to work.
This has happened in multiple locations on private and public networks.
What does not work/fix it:
Resetting router
changing dns server on computer or router
connecting to another network
removing the airport interface and adding it back
flushing dns
The only solution seems to be a restart.
A solution to this would be great, but any ideas of this to try would be great. Even a sure way to reproduce this would be useful.
Maybe related question: But this is most definitely not true for me.
"if I refresh enough -- 3 to 4 times --, it will usually pull up the site. "
Here are some tests from terminal. Basically this confirms dns in not functioning
vmd17:~ vmd$ ping google.com
ping: cannot resolve google.com: Unknown host
Trace route to google dns, This works
vmd17:~ vmd$ /usr/sbin/traceroute -n -w 2 -q 2 -m 30 8.8.8.8
traceroute to 8.8.8.8 (8.8.8.8), 30 hops max, 52 byte packets
1 192.168.1.1 5.195 ms 2.519 ms
2 67.172.136.1 31.881 ms 9.177 ms
3 68.85.107.121 12.168 ms 10.003 ms
4 68.86.103.41 12.021 ms 9.594 ms
5 68.86.91.1 16.712 ms 12.837 ms
6 68.86.86.210 29.951 ms 25.826 ms
7 68.86.87.218 29.554 ms 42.894 ms
8 75.149.231.70 68.271 ms 68.362 ms
9 72.14.233.77 141.178 ms
72.14.233.85 82.553 ms
10 72.14.238.243 83.381 ms 82.811 ms
11 72.14.232.213 194.387 ms
72.14.232.215 84.837 ms
12 209.85.253.145 100.294 ms *
13 8.8.8.8 101.689 ms 89.694 ms
208.67.222.22 is the ip address of opendns dns server
vmd17:~ vmd$ dig @208.67.222.222 8.8.8.8
; <<>> DiG 9.6.0-APPLE-P2 <<>> @208.67.222.222 8.8.8.8
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
vmd17:~ vmd$ dig @208.67.222.222 gogle.com
vmd17:~ vmd$ dig @208.67.222.222 google.com
; <<>> DiG 9.6.0-APPLE-P2 <<>> @208.67.222.222 google.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
vmd17:~ vmd$ dig @8.8.8.8 google.com
; <<>> DiG 9.6.0-APPLE-P2 <<>> @8.8.8.8 google.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
