DNSDiag v1.6.0 發布
DNSDiag可以助你排查DNS流量被ISP劫持和DNS響應了錯誤的行為亦或指向了錯誤的地址等問題，DNSDiag 包含 dnsping、dnstraceroute、dnseval 三個工具。
dnsping
又一個跟 ping 類似的工具，針對 HTTP 的可參考 httping。dnsping 發送 DNS 查詢來 ping DNS 服務器：
./dnsping -s 8.8.8.8 -c 5 linuxtoy.org
dnsping DNS: 8.8.8.8:53, hostname: linuxtoy.org, rdatatype: A
39 bytes from 8.8.8.8: seq=0 time=111.764 ms
38 bytes from 8.8.8.8: seq=1 time=65.606 ms
39 bytes from 8.8.8.8: seq=2 time=110.593 ms
38 bytes from 8.8.8.8: seq=3 time=67.940 ms
38 bytes from 8.8.8.8: seq=4 time=66.181 ms
--- 8.8.8.8 dnsping statistics ---
5 requests transmitted, 5 responses received, 0% lost
min=65.606 ms, avg=84.417 ms, max=111.764 ms, stddev=24.449 ms
其中，-s 指定 DNS 服務器，-c 為請求次數，linuxtoy.org 為要查詢的域名。從結果我們可以看到，查詢的最小、最大及平均響應時間。
dnstraceroute
這個工具與 traceroute 相似，用來查詢 DNS 請求的路由：
./dnstraceroute --expert -s 8.8.8.8 linuxtoy.org
dnstraceroute DNS: 8.8.8.8:53, hostname: linuxtoy.org, rdatatype: A
1 gateway (10.217.89.1) 1 ms
2 10.210.4.37 (10.210.4.37) 1 ms
3 10.210.2.67 (10.210.2.67) 1 ms
4 254.118.142.219.broad.bj.bj.dynamic.163data.com.cn (219.142.118.254) 2 ms
5 10.210.1.14 (10.210.1.14) 4 ms
6 192.168.5.30 (192.168.5.30) 7 ms
7 180.149.129.217 (180.149.129.217) 7 ms
8 *
9 180.149.128.9 (180.149.128.9) 8 ms
10 202.97.53.146 (202.97.53.146) 8 ms
11 202.97.58.94 (202.97.58.94) 9 ms
12 202.97.91.114 (202.97.91.114) 49 ms
13 202.97.62.214 (202.97.62.214) 47 ms
14 209.85.241.58 (209.85.241.58) 43 ms
15 209.85.142.185 (209.85.142.185) 45 ms
16 216.239.41.7 (216.239.41.7) 152 ms
17 209.85.243.23 (209.85.243.23) 62 ms
18 *
19 google-public-dns-a.google.com (8.8.8.8) 72 ms
=== Expert Hints ===
[*] public DNS server is next to an invisible hop (probably a firewall)
--expert 選項可以給出一些有用的提示。
dnseval
批量 ping 工具，同樣是針對 DNS：
./dnseval linuxtoy.org
server avg(ms) min(ms) max(ms) stddev(ms) lost(%)
---------------------------------------------------------------------------
10.210.12.10 51.627 1.169 503.838 158.891 %0
202.106.182.153 285.889 2.336 604.162 312.265 %14
更新日志
- Improved time calculations
- Display DNS response in verbose mode
- Display correct TTL for CNAME records
下載
- dnsdiag-1.6.0.darwin-x86_64.tar.gz
- dnsdiag-1.6.0.linux-x86_64-bin.tar.gz
- dnsdiag-1.6.0.win-amd64-exe.zip
- Source code (zip)
- Source code (tar.gz)
本站原創，轉載時保留以下信息：
本文轉自：深度開源（open-open.com）
原文地址：http://www.baiduhome.net/news/view/649d963c