DNS 为什么不稳定 ？

attempt

nslookup -sil ccc.yyblog.com.cn 61.182.49.7
nslookup -sil ccc.yyblog.com.cn 61.139.2.69

同样的执行上面的命令，为什么有时候能正常解析，
而有时候又出现如下提示，感觉极度不稳定，被弄的快要崩溃了
请各位出手相助吧，谢了！

;; connection timed out; no servers could be reached

27-Nov-2006 18:37:52.978 client 61.182.49.7#42004: view view_cnc: query: yyblog.com.cn IN A -E
27-Nov-2006 18:37:52.979 client 61.182.49.7#42004: view view_cnc: query: yyblog.com.cn IN A6 -E
27-Nov-2006 18:37:55.032 client 220.167.29.239#42531: view view_any: query: yyblog.com.cn IN AAAA -E
;; connection timed out; no servers could be reached

byfree

我也遇到类似问题，顶

ljiayu-nj

我的DNS服务器也是这样，一会好的，一会不能解析。正准备把DNS服务器重做一下。

顶！

gaochong

29-Nov-2006 18:25:05.547 client 202.108.11.235#32768: view cnc: query: bbs.goupper.com IN A -E

IN A -E 代表什么意思？？

还有这个：29-Nov-2006 06:45:11.408 client 222.46.18.252#1026: view crc: query: dns1.goupper.com IN A -

各代表什么意思？
谢谢。

diancn

E表示是否使用了EDNS， +E表示使用，-E表示未使用。

详见 BIND-9.3.2-P2 ARM 6.2.10.2 The category Phrase 节
有一个表格，对应queries一栏。
Specify where queries should be logged to.
At startup, specifing the category queries will also enable query logging unless querylog option has been specified.
The query log entry reports the client’s IP address and port number. The query name, class and type. It also reports whether the Recursion Desired flag was set (+ if set, - if not set), EDNS was in use (E) or if the query was signed (S).
client 127.0.0.1#62536: query: www.example.com IN AAAA +SE
client ::1#62537: query: www.example.net IN AAAA -SE