我无法解析主机名，除非使用 dig/nslookup。声明主机/etc/hosts工作正常。DNSmasq 或 bind 正在运行。以下是tcpdump port 53运行时的输出dig google.com：
21:02:49.269083 IP txxxxxx1.corp.mxxxxxxs.com.39872 > dxxxxxx3.corp.mxxxxxs.com.domain: 7362+ A? google.com. (28)
21:02:49.269614 IP dxxxxxx3.corp.mxxxxxxs.com.domain > txxxxxx1.corp.mxxxxxxs.com.39872: 7362 5/0/0 A ord08s07-in-f19.1e100.net,[|domain]
21:02:49.270506 IP txxxxxx1.corp.mxxxxxxs.com.33316 > dxxxxxx3.corp.mxxxxxxs.com.domain: 30910+ PTR? 83.225.125.74.in-addr.arpa. (44)
21:02:49.303321 IP dxxxxxx3.corp.mxxxxxxs.com.domain > txxxxxx1.corp.mxxxxxxs.com.33316: 30910*- 1/0/0 (83)
运行时的结果ping google.com：
21:03:05.027197 IP txxxxxx1.corp.mxxxxxxs.com.59151 > dxxxxxx3.corp.mxxxxxxs.com.domain: 56092+ A? google.com. (28)
21:03:05.029069 IP dxxxxxx3.corp.mxxxxxxs.com.domain > txxxxxx1.corp.mxxxxxxs.com.59151: 56092 5/0/0 A ord08s07-in-f18.1e100.net,[|domain]
21:03:05.029309 IP txxxxxx1.corp.mxxxxxxs.com.58238 > dxxxxxx3.corp.mxxxxxxs.com.domain: 10345+ PTR? 82.225.125.74.in-addr.arpa. (44) …