DNSCrypt、Unbound和DNSSEC

Question

我希望有一个加密的DNS查询+ DNS缓存+域名系统安全扩展(DNSSEC)。

我使用这个bash脚本来安装DNSCrypt，并选择使用dnscrypt.eu服务器：

DNSCrypt.eu (no logs)

Holland
Server address:
176.56.237.171:443
Provider name
2.dnscrypt-cert.dnscrypt.eu
Public key
67C0:0F2C:21C5:5481:45DD:7CB4:6A27:1AF2:EB96:9931:40A3:09B6:2B8D:1653:1185:9C66

我已安装( apt-get install unbound )解除绑定，并且我的unbound.conf文件包含：

#
# See the unbound.conf(5) man page.
#
# See /usr/share/doc/unbound/examples/unbound.conf for a commented
# reference config file.

server:
    # The following line will configure unbound to perform cryptographic
    # DNSSEC validation using the root trust anchor.
    auto-trust-anchor-file: "/var/lib/unbound/root.key"
server:
verbosity: 1
num-threads: 4                                                        
interface: 0.0.0.0
 do-ip4: yes
 do-udp: yes
 do-tcp: yes
 access-control: 192.168.0.0/24 allow                
 do-not-query-localhost: no
 chroot: ""       
 logfile: "/var/log/unbound.log"             
 use-syslog: no 
 hide-identity: yes
 hide-version: yes 
 harden-glue: yes
 harden-dnssec-stripped: yes
 use-caps-for-id: yes       
 private-domain: "localhost"      
 local-zone: "localhost." static
 local-data: "freebox.localhost. IN A 192.168.0.254"                                              
 local-data-ptr: "192.168.0.254 freebox.localhost"
python:
remote-control:
forward-zone:
  name: "."
  forward-addr: 127.0.0.1@40

如您所见，我添加了这一行以激活DNSSEC：

server:
    # The following line will configure unbound to perform cryptographic
    # DNSSEC validation using the root trust anchor.
    auto-trust-anchor-file: "/var/lib/unbound/root.key" 

现在，当我输入：sudo service unbound start时，这是我得到的错误：

     * Restarting recursive DNS server unbound
[1382606879] unbound[8878:0] error: bind: address already in use
[1382606879] unbound[8878:0] fatal error: could not open ports

我的问题当然是关于错误！另外，在普通膝上型计算机(而不是DNS服务器)中使用DNSSEC是有用的，还是仅对DNS服务器有用？

Answer 1

谢谢@Jiri Xichtkniha和@Anthon

打字时

sudo lsof -nPi | grep \:53

我可以看到bind也在监听同一个端口：

TCP *:53 (LISTEN)

然后，通过添加以下行，对/etc/unbound/un界. line进行了修改：

port:533

ps :服务器响应查询的端口号，默认为53。

另一个解决方案是将Bind端口从53更改为另一端口。

Answer 2

您的dnscrypt代理已经使用了端口53。我打赌:)