[Dnsmasq-discuss] Failed to lookup names randomly
Wang Jian
larkwang at gmail.com
Fri May 9 06:31:48 UTC 2014
Just now, I refreshed store.apple.com page but failed, I retried several
times and it loaded. The following is the relevant log.
May 9 14:09:36 dnsmasq[22631]: query[A] store.apple.com from 10.2.3.178
May 9 14:09:36 dnsmasq[22631]: forwarded store.apple.com to 114.114.114.114
May 9 14:09:36 dnsmasq[22631]: reply store.apple.com is <CNAME>
May 9 14:09:36 dnsmasq[22631]: reply store.apple.com.edgekey.net is <CNAME>
May 9 14:09:36 dnsmasq[22631]: reply
store.apple.com.edgekey.net.globalredir.akadns.net is <CNAME>
May 9 14:09:36 dnsmasq[22631]: reply e2850.ca2.s.tl88.net is 183.61.92.118
May 9 14:09:37 dnsmasq[22631]: query[A] store.apple.com from 10.2.3.178
May 9 14:09:37 dnsmasq[22631]: forwarded store.apple.com to 114.114.114.114
May 9 14:09:37 dnsmasq[22631]: reply store.apple.com is <CNAME>
May 9 14:09:37 dnsmasq[22631]: reply store.apple.com.edgekey.net is <CNAME>
May 9 14:09:37 dnsmasq[22631]: reply
store.apple.com.edgekey.net.globalredir.akadns.net is <CNAME>
May 9 14:09:37 dnsmasq[22631]: reply e2850.ca2.s.tl88.net is 183.61.92.118
May 9 14:09:38 dnsmasq[22631]: query[A] store.apple.com from 10.2.3.178
May 9 14:09:38 dnsmasq[22631]: forwarded store.apple.com to 114.114.114.114
May 9 14:09:38 dnsmasq[22631]: reply store.apple.com is <CNAME>
May 9 14:09:38 dnsmasq[22631]: reply store.apple.com.edgekey.net is <CNAME>
May 9 14:09:38 dnsmasq[22631]: reply
store.apple.com.edgekey.net.globalredir.akadns.net is <CNAME>
May 9 14:09:38 dnsmasq[22631]: reply e2850.ca2.s.tl88.net is 183.61.92.118
May 9 14:09:39 dnsmasq[22631]: reply e7766.ca.s.tl88.net is 122.228.220.28
May 9 14:09:39 dnsmasq[22631]: query[A] store.apple.com from 10.2.3.178
May 9 14:09:39 dnsmasq[22631]: forwarded store.apple.com to 114.114.114.114
May 9 14:09:40 dnsmasq[22631]: reply store.apple.com is <CNAME>
May 9 14:09:40 dnsmasq[22631]: reply store.apple.com.edgekey.net is <CNAME>
May 9 14:09:40 dnsmasq[22631]: reply
store.apple.com.edgekey.net.globalredir.akadns.net is <CNAME>
May 9 14:09:40 dnsmasq[22631]: reply e2850.ca2.s.tl88.net is 183.61.92.118
2014-05-08 20:47 GMT+08:00 Wang Jian <larkwang at gmail.com>:
> As I said earlier, I have a dnsmasq setup in a 150 clients environment.
> We are running debian package 2.70-1 built from git.
>
> These few days, we frequently have name lookup failure. I have no
> conclusion by now, but I suspect cache code is involved.
>
> A log segment
>
> <colleague A in my team visit this site in browser>
> May 8 18:51:30 dnsmasq[22631]: query[A] www.iciba.com from 10.2.3.102
> May 8 18:51:30 dnsmasq[22631]: forwarded www.iciba.com to 114.114.114.114
> May 8 18:51:30 dnsmasq[22631]: query[A] goto.www.iciba.com from
> 10.2.3.102
> May 8 18:51:30 dnsmasq[22631]: forwarded goto.www.iciba.com to
> 114.114.114.114
> May 8 18:51:30 dnsmasq[22631]: reply www.iciba.com is 58.68.226.32
> May 8 18:51:30 dnsmasq[22631]: reply goto.www.iciba.com is <CNAME>
> < browser failed to load the page, dns query failed >
>
> <colleague B in my team visit this site by click url provided by A>
> May 8 18:52:23 dnsmasq[22631]: query[A] www.iciba.com from 10.2.1.194
> May 8 18:52:23 dnsmasq[22631]: forwarded www.iciba.com to 114.114.114.114
> May 8 18:52:23 dnsmasq[22631]: reply www.iciba.com is 58.68.226.32
>
> <colleague A tried again>
> May 8 18:52:39 dnsmasq[22631]: query[A] www.iciba.com from 10.2.3.102
> May 8 18:52:39 dnsmasq[22631]: forwarded www.iciba.com to 114.114.114.114
> May 8 18:52:39 dnsmasq[22631]: reply www.iciba.com is 58.68.226.32
> <this time page load successfully>
>
> May 8 18:53:03 dnsmasq[22631]: query[A] goto.www.iciba.com from
> 10.2.3.102
> May 8 18:53:03 dnsmasq[22631]: forwarded goto.www.iciba.com to
> 114.114.114.114
> May 8 18:53:03 dnsmasq[22631]: reply goto.www.iciba.com is <CNAME>
>
> <the following is I test from the router itself, by running 'host' and
> 'dig'>
>
> May 8 19:59:00 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 19:59:00 dnsmasq[22631]: forwarded www.iciba.com to 114.114.114.114
> May 8 19:59:00 dnsmasq[22631]: reply www.iciba.com is 58.68.226.32
> May 8 19:59:04 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 19:59:04 dnsmasq[22631]: forwarded www.iciba.com to 114.114.114.114
> May 8 19:59:04 dnsmasq[22631]: reply www.iciba.com is 58.68.226.32
> May 8 19:59:06 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 19:59:06 dnsmasq[22631]: cached www.iciba.com is 58.68.226.32
> May 8 19:59:08 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 19:59:08 dnsmasq[22631]: cached www.iciba.com is 58.68.226.32
> May 8 19:59:12 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 19:59:12 dnsmasq[22631]: cached www.iciba.com is 58.68.226.32
> May 8 19:59:13 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 19:59:13 dnsmasq[22631]: cached www.iciba.com is 58.68.226.32
> May 8 19:59:15 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 19:59:15 dnsmasq[22631]: cached www.iciba.com is 58.68.226.32
> May 8 20:00:22 dnsmasq[22631]: query[A] www.iciba.com from 10.2.0.1
> May 8 20:00:22 dnsmasq[22631]: forwarded www.iciba.com to 114.114.114.114
> May 8 20:00:22 dnsmasq[22631]: reply www.iciba.com is 58.68.226.32
>
>
> The last 8 'dig' return (look at the TTL)
>
> www.iciba.com. 557 IN A 58.68.226.32
> www.iciba.com. 552 IN A 58.68.226.32
> www.iciba.com. 550 IN A 58.68.226.32
> www.iciba.com. 548 IN A 58.68.226.32
> www.iciba.com. 544 IN A 58.68.226.32
> www.iciba.com. 543 IN A 58.68.226.32
> www.iciba.com. 541 IN A 58.68.226.32
> www.iciba.com. 475 IN A 58.68.226.32
>
>
>
> The following is earlier log I lookup a name from the router when given a
> unresolvable name.
>
>
> root at b10gw:~# host en.cppreference.com
> Host en.cppreference.com not found: 2(SERVFAIL)
> root at b10gw:~# host en.cppreference.com
> Host en.cppreference.com not found: 2(SERVFAIL)
> root at b10gw:~# host en.cppreference.com 8.8.8.8
> Using domain server:
> Name: 8.8.8.8
> Address: 8.8.8.8#53
> Aliases:
>
> en.cppreference.com has address 74.114.88.128
> root at b10gw:~# host en.cppreference.com
> Host en.cppreference.com not found: 2(SERVFAIL)
> root at b10gw:~# host en.cppreference.com
> en.cppreference.com has address 74.114.88.128
> root at b10gw:~# host en.cppreference.com
> en.cppreference.com has address 74.114.88.128
> root at b10gw:~# host en.cppreference.com
> en.cppreference.com has address 74.114.88.128
> root at b10gw:~# host en.cppreference.com
> en.cppreference.com has address 74.114.88.128
> root at b10gw:~# host en.cppreference.com
> en.cppreference.com has address 74.114.88.128
> root at b10gw:~# host en.cppreference.com
> en.cppreference.com has address 74.114.88.128
>
>
>
> May 8 17:49:15 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:15 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:15 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:15 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:15 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:15 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:17 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:17 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:17 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:17 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:17 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:17 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:24 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:24 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:24 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:24 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:24 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:24 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:26 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:26 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:26 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:26 dnsmasq[17390]: query[AAAA] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:26 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:26 dnsmasq[17390]: reply en.cppreference.com is NODATA-IPv6
> May 8 17:49:26 dnsmasq[17390]: query[MX] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:26 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:27 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:27 dnsmasq[17390]: cached en.cppreference.com is
> 74.114.88.128
> May 8 17:49:27 dnsmasq[17390]: query[AAAA] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:27 dnsmasq[17390]: cached en.cppreference.com is NODATA-IPv6
> May 8 17:49:27 dnsmasq[17390]: query[MX] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:27 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:32 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:32 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:32 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:32 dnsmasq[17390]: query[AAAA] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:32 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:32 dnsmasq[17390]: reply en.cppreference.com is NODATA-IPv6
> May 8 17:49:32 dnsmasq[17390]: query[MX] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:32 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:33 dnsmasq[17390]: query[A] en.cppreference.com from 10.2.0.1
> May 8 17:49:33 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:33 dnsmasq[17390]: reply en.cppreference.com is 74.114.88.128
> May 8 17:49:33 dnsmasq[17390]: query[AAAA] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:33 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:33 dnsmasq[17390]: reply en.cppreference.com is NODATA-IPv6
> May 8 17:49:33 dnsmasq[17390]: query[MX] en.cppreference.com from
> 10.2.0.1
> May 8 17:49:33 dnsmasq[17390]: forwarded en.cppreference.com to
> 114.114.114.114
> May 8 17:49:33 dnsmasq[17390]: query[A] en.cppreference.com from
> 10.2.1.194
> May 8 17:49:33 dnsmasq[17390]: cached en.cppreference.com is
> 74.114.88.128
>
>
>
>
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