Guru test keep failing (Couldn't query name server)

ZwA

Newbie

Posts: 5

Guru test keep failing (Couldn't query name server)

« on: May 20, 2011, 10:45:14 am »

Hello, I'm trying to pass the guru test, but it seems the HE test can't query my name server.

Any ideas what might be wrong?

Code:

debian:/# for s in `dig -6 NS uppland.sweden.goldflipper.net +short`; do echo Testing $s:; echo IP address of name server: `dig -6 AAAA $s +short`; echo IP address of uppland.sweden.goldflipper.net: `dig -6 AAAA uppland.sweden.goldflipper.net @$s +short`; echo Done testing $s; echo; echo;done;
Testing uppland.sweden.goldflipper.net.:
IP address of name server: 2001:470:27:810::2
IP address of uppland.sweden.goldflipper.net: 2001:470:27:810::2
Done testing uppland.sweden.goldflipper.net.

Code:

Hop Node Loss% Sent Last Avg Best Worst StDev
1. 2001:6f8:200:1003::1 0.0% 5 2.5 12.8 1.4 55.4 23.8
2. 2001:6f8:1:2:87:86:71:164 0.0% 5 1.1 1.9 1.1 2.7 0.6
3. 2001:6f8:1:2:87:86:71:164 80.0% 5 1.2 1.2 1.2 1.2 0.0
4. 2001:6f8:1:0:87:86:77:49 0.0% 5 1.4 1.8 1.1 2.3 0.5
5. 2001:6f8:1:0:87:86:77:21 0.0% 5 1.4 1.8 1.4 2.3 0.4
6. 2001:6f8:1:0:87:86:77:53 0.0% 5 1.8 1.7 1.3 2.2 0.4
7. 2001:6f8:1:0:87:86:77:29 0.0% 5 4.9 5.0 4.8 5.8 0.4
8. 2001:6f8:1:0:87:86:77:14 0.0% 5 14.8 14.7 13.9 15.0 0.5
9. ??? 100.0 5 0.0 0.0 0.0 0.0 0.0
10. 2001:7f8::1b1b:0:1 0.0% 5 56.8 26.0 15.2 56.8 17.8
11. 2001:470:0:110::2 0.0% 5 40.1 40.2 39.6 40.8 0.4
12. 2001:470:0:11e::2 0.0% 5 41.5 41.9 41.5 43.1 0.7
13. 2001:470:27:810::2 0.0% 5 45.8 46.1 45.4 46.9 0.6


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cholzhauer

Hero Member

Posts: 2082

Re: Guru test keep failing (Couldn't query name server)

« Reply #1 on: May 20, 2011, 10:56:23 am »

What's your TTL? How long ago did you make the NS change?


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ZwA

Newbie

Posts: 5

Re: Guru test keep failing (Couldn't query name server)

« Reply #2 on: May 20, 2011, 11:00:23 am »

My TTL is set to 24 hours and the NS change was done about 4-5 hours ago.


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cholzhauer

Hero Member

Posts: 2082

Re: Guru test keep failing (Couldn't query name server)

« Reply #3 on: May 20, 2011, 11:03:01 am »

What about setting a lower TTL?


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ZwA

Newbie

Posts: 5

Re: Guru test keep failing (Couldn't query name server)

« Reply #4 on: May 20, 2011, 11:25:59 am »

I figured there might be a negative cache, so lowering the TTL shouldnt help. This is what I get from using he.net's traceroute

Code:

core1.fmt1.he.net> traceroute ipv6 2001:470:27:810::2

Sending DNS Query to 65.19.175.2

Tracing the route to IPv6 node v6.zwa.strangled.net(2001:470:27:810::2)from 1 to 30 hops

1 1 ms 1 ms <1 ms 10gigabitethernet1-2.core1.sjc2.he.net [2001:470:0:2f::2]
2 27 ms 49 ms 38 ms 10gigabitethernet3-3.core1.den1.he.net [2001:470:0:1b4::2]
3 56 ms 51 ms 65 ms 10gigabitethernet1-1.core1.chi1.he.net [2001:470:0:1af::1]
4 84 ms 94 ms 69 ms 10gigabitethernet7-2.core1.nyc4.he.net [2001:470:0:1c6::1]
5 145 ms 146 ms 151 ms 10gigabitethernet3-3.core1.lon1.he.net [2001:470:0:128::2]
6 176 ms 167 ms 151 ms 10gigabitethernet4-2.core1.fra1.he.net [2001:470:0:1d2::2]
7 190 ms 189 ms 173 ms 10gigabitethernet1-1.core1.sto1.he.net [2001:470:0:110::2]
8 176 ms 179 ms 174 ms 1g-eth0.tserv24.sto1.ipv6.he.net [2001:470:0:11e::2]
9 189 ms 179 ms 179 ms v6.zwa.strangled.net [2001:470:27:810::2]
# Entry cached for another 49 seconds.

Maybe I should just wait it out? Negative cache shouldnt last long, a day or so maybe?