DNSCrypt, 언바운드 및 DNSSEC

암호화된 DNS 쿼리 + DNS 캐싱 + DNSSEC(Domain Name System Security Extensions)가 필요합니다.

이 bash 스크립트를 사용하여 DNSCrypt를 설치하고 dnscrypt.eu 서버를 사용하기로 선택했습니다.

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

설치( apt-get install unbound바인딩 해제)했으며 unbound.conf 파일에 다음이 포함되어 있습니다.

#
# 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

보시다시피 DNSSEC를 활성화하기 위해 다음 줄을 추가했습니다.

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" 

이제 다음을 입력하면 sudo service unbound start 다음과 같은 오류가 발생합니다.

     * 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

내 질문은 물론 오류에 관한 것입니다! 또한 DNS 서버가 아닌 일반 노트북에서 DNSSEC를 사용하는 것이 유용합니까, 아니면 DNS 서버에만 유용합니까?