我已经安装DNS加密在 Ubuntu Linux 10.04.1 x86_64 上，它工作正常
nslookup facebook.com 127.0.0.2
Server: 127.0.0.2
Address: 127.0.0.2#53
Non-authoritative answer:
Name: facebook.com
Address: 173.252.110.27
但约 60 秒后
nslookup facebook.com 127.0.0.2
;; connection timed out; no servers could be reached
守护进程已在运行。这就像操作系统的某些东西阻止 /usr/local/sbin/dnscrypt-proxy 接受连接。什么可以做到这一点？
编辑 1：问题仅有的出现在UDP。
查询 udp 端口
dig @127.0.0.2 +notcp facebook.com
; <<>> DiG 9.7.0-P1 <<>> @127.0.0.2 +notcp facebook.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached
查询 tcp 端口
dig @127.0.0.2 +tcp facebook.com
; <<>> DiG 9.7.0-P1 <<>> @127.0.0.2 +tcp facebook.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 63984
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;facebook.com. IN A
;; ANSWER SECTION:
facebook.com. 889 IN A 173.252.110.27
;; Query time: 516 msec
;; SERVER: 127.0.0.2#53(127.0.0.2)
;; WHEN: Sun May 5 22:34:14 2013
;; MSG SIZE rcvd: 46