Hello, Everyone
I hope that one of the many geniuses that frequent this list might be
able to shed some light on a problem that I am having. I do run Fedora
Core 6 (very happily, I must say :)) but this is too off topic, please
feel free to contact me off list.
I have fully qualified domain:
afolkey2.net. It can USUALLY be found
thusly:
http://www.afolkey2.net
Tonight when I came home from work, I started seeing problems with
pages loading. Try the following to see what I mean:
http://www.afolkey2.net/awstats/awstats.pl?config=www.afolkey2.net
http://www.afolkey2.net/gallery2/main.php
I use the free dynamic dns service from
dnsexit.com. The nameservers
that they have me point my domain to are as follows:
ns1.dnsexit.com
ns2.dnsexit.com
When I noticed the severe issues described above, I ran "ping" on each
of those two servers. The edited results of "ping ns1.dnsexit.com"
look something like this:
PING
ns1.dnsexit.com (63.223.76.173) 56(84) bytes of data.
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=1 ttl=48 time=417 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=2 ttl=48 time=436 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=3 ttl=48 time=375 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=4 ttl=48 time=349 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=5 ttl=48 time=258 ms
---
ns1.dnsexit.com ping statistics ---
49 packets transmitted, 46 received, 6% packet loss, time 48033ms
rtt min/avg/max/mdev = 91.901/433.380/827.993/223.834 ms
That didn't look very fair :), so I ran ping on that server again:
PING
ns1.dnsexit.com (63.223.76.173) 56(84) bytes of data.
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=1 ttl=48 time=88.1 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=2 ttl=48 time=98.5 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=3 ttl=48 time=89.0 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=4 ttl=48 time=86.9 ms
64 bytes from
ns1.dnsexit.com (63.223.76.173): icmp_seq=5 ttl=48 time=89.0 ms
---
ns1.dnsexit.com ping statistics ---
87 packets transmitted, 84 received, 3% packet loss, time 86027ms
rtt min/avg/max/mdev = 85.584/91.493/108.933/4.825 ms
But, if I run "ping ns2.dnsexit.com" the results (again edited) look
like this:
PING
ns2.dnsexit.com (64.182.102.188) 56(84) bytes of data.
64 bytes from
nd188.dnsexit.com (64.182.102.188): icmp_seq=1 ttl=53 time=23.2 ms
64 bytes from
nd188.dnsexit.com (64.182.102.188): icmp_seq=2 ttl=53 time=23.1 ms
64 bytes from
nd188.dnsexit.com (64.182.102.188): icmp_seq=3 ttl=53 time=21.1 ms
64 bytes from
nd188.dnsexit.com (64.182.102.188): icmp_seq=4 ttl=53 time=18.6 ms
64 bytes from
nd188.dnsexit.com (64.182.102.188): icmp_seq=5 ttl=53 time=23.3 ms
---
ns2.dnsexit.com ping statistics ---
42 packets transmitted, 42 received, 0% packet loss, time 41040ms
rtt min/avg/max/mdev = 18.630/25.121/40.702/4.839 ms
In this case, the times seem much quicker, and you will notice that
unlike when I pinged
ns1.dnsexit.com, there was no packet loss.
Check the list of packets and see if you have out of sequence or missing
sequence numbers. If all that's missing are the last few (most likely
with delays >25mS), what you're seeing is that hitting CTRL-C aborts the
program before those last few packets are received.
But
you will also notice that when I ran "ping ns2.dnsexit.com" that the
server that appeared to be the one that was queried is
"nd188.dnsexit.com", not "ns2.dnsexit.com"
That's an alias (CNAME). No big deal.
I don't know what (if any) the significance of that fact is. I
merely
observe it.
If nothing else, I THINK I can safely assume that they are having some
issues on their end. Nonetheless, do any of you have any suggestions
about free dynamic DNS services that you have had good fortune with?
Anyway, thank you in advance for any help that you may be able to give
me.
Run several traceroutes to the DNS servers and the website in question.
You may find an overlength route or possibly discover a flapping route
with one of the ISPs. This is information their support groups will
want to have.
----------------------------------------------------------------------
- Rick Stevens, Principal Engineer rstevens(a)internap.com -
- CDN Systems, Internap, Inc.
-
- -
- Beware of programmers who carry screwdrivers -
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