On 2014-09-07 18:08, James Knott wrote:
On 09/07/2014 11:54 AM, Carlos E. R. wrote:
# cat /etc/resolv.conf | egrep -v "^[[:space:]]*$|^#" search jknott.net nameserver 2620:0:ccc::2 nameserver 2001:470:20::2 nameserver 8.8.8.8 You have defined IPv6 DNS higher up. Yep. Been running that way for over 4 years.
Then try to ping, by number, "173.194.45.160", or some numbers up (google.com). I have no problem reaching the Internet, it's just DNS on that one computer that's failing. Ok.
Then try "host -v google.com".
# host -v google.com Trying "google.com" ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1079 ;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION: ;google.com. IN A
;; ANSWER SECTION: google.com. 288 IN A 173.194.43.105 google.com. 288 IN A 173.194.43.101 google.com. 288 IN A 173.194.43.96 google.com. 288 IN A 173.194.43.98 google.com. 288 IN A 173.194.43.97 google.com. 288 IN A 173.194.43.100 google.com. 288 IN A 173.194.43.110 google.com. 288 IN A 173.194.43.104 google.com. 288 IN A 173.194.43.103 google.com. 288 IN A 173.194.43.102 google.com. 288 IN A 173.194.43.99
Received 204 bytes from 8.8.8.8#53 in 38 ms Trying "google.com" ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32390 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION: ;google.com. IN AAAA
;; ANSWER SECTION: google.com. 203 IN AAAA 2607:f8b0:400b:80a::1004
You get an IPv6 address as answer. And some IPv4 addresses before. I normally run IPv6 on my network and have since May 2010. On booting
On 09/07/2014 12:22 PM, Carlos E. R. wrote: that firewall computer, one thing that happens is the 6in4 tunnel starts up. Until it's up, that computer relies on the 8.8.8.8 DNS. Once the tunnel is going, the IPv6 DNS addresses work. I have also tried using just 8.8.8.8, but the problem remains. I also tried disabling IPv6 on that computer and again no difference.
But then
# ping google.com ping: unknown host google.com
So, host works, but apps that require DNS look up don't. "ping" wants an IPv4 address. Try ifping6 would work. And plain "ping" too, but you need to add some extra options. A quick look at the manual says "-I".
Until I get IPv6 up, that's unlikely to work.
Perhaps "ping -v ..." would tell you something more.
Ah, I forgot - post this:
cat /etc/hosts.conf | egrep -v "^[[:space:]]*$|^#"
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