February 24, 2006

DNS Problems Weirding Me Out

Since I updated the DNS a couple of days ago, there have been a number of people who haven't been able to reach munu, or some sites on munu, or who have had intermittent access.

As far as I can tell, though, everything is set up correctly.

For example:

# dig blog.mu.nu

; <<>> DiG 9.2.4 <<>> blog.mu.nu
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29759
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;blog.mu.nu. IN A

;; ANSWER SECTION:
blog.mu.nu. 14400 IN A 69.72.215.227

;; AUTHORITY SECTION:
blog.mu.nu. 86400 IN NS kei.mu.nu.
blog.mu.nu. 86400 IN NS yuri.mu.nu.

;; ADDITIONAL SECTION:
kei.mu.nu. 14400 IN A 69.72.215.218
yuri.mu.nu. 14400 IN A 69.72.215.226

;; Query time: 845 msec
;; SERVER: 10.1.1.15#53(10.1.1.15)
;; WHEN: Fri Feb 24 14:08:05 2006
;; MSG SIZE rcvd: 113
That's exactly how it should be. We have two DNS servers (as it says), and blog.mu.nu lives at that IP address.

The DNS checker at squish.net (a wonderful tool), returns:

Results

50.0% of queries will be returned by 69.72.215.218 (ns1.mu.nu)

blog.mu.nu. 14400 IN A 69.72.215.227

50.0% of queries will be returned by 69.72.215.226 (ns2.mu.nu)

blog.mu.nu. 14400 IN A 69.72.215.227

Again, no errors, both DNS servers working, correct result returned.

Anyone out there who is DNS savvy, could you take a quick look at what you are seeing from your point of view and leave a comment. I think that the problem is due to flaky DNS caching servers being run by various ISPs, but I'd like to be sure.

Update: I thought I'd managed to duplicate the problem on my wireless internet, but before I could do any real diagnosis it started working again. Damn.

Posted by Pixy Misa at February 24, 2006 03:11 AM | TrackBack
Comments
#1

Okay this is strange. My friend Tammi has been having this problem. She's on Insight for her ISP. I thought it might be a flaky dns too. Unfortunately I didn't have her tracert or ping the correct name. As this has been ongoing I'll see if she can do it tomorrow. Unless it's figured out by then.

Posted by Teresa at February 24, 2006 05:05 AM
#2

That's interesting. I've had reports of other people on Insight having the same problem. I'll see if I can work out what's going on there.

Posted by Pixy Misa at February 24, 2006 07:15 AM
#3

No, I can't work it out. Oh well.

Posted by Pixy Misa at February 24, 2006 07:22 AM
#4

I found that I had regained access to Munu sites (including my own) when I checked Saturday evening. Maybe my ISP is stupid and recalcitrant but finally surrendered to Pixy's indomitable will.

Yeah, that's it (because that kind of explanation makes much more sense to me than the scripty codey stuff.)

Yay Pixy!

Posted by Debbye at February 26, 2006 12:42 AM
#5

Yay! I think it may be because we changed DNS *servers* rather than just the DNS settings, and that can have a longer delay time. It still shouldn't have taken so long, but at least it's all happy now. :)

Posted by Pixy Misa at February 26, 2006 01:38 AM
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