关于DNS_Beacon

systemd-resolved 利用 systemd-resolved.service(8) 系统服务解析主机名、IP地址、域名、DNS资源记录、服务。
占用的是53端口。
想要建立dns beacon，要将teamserver变成自己的dns服务器，所以要关掉系统进程systemd-resolved的53端口。
常用指令

 netstat -nlp|grep 53

关掉Ubuntu18 systemd-resolved的log:

root@vultr:~# systemctl disable systemd-resolved
Removed /etc/systemd/system/multi-user.target.wants/systemd-resolved.service.
Removed /etc/systemd/system/dbus-org.freedesktop.resolve1.service.
root@vultr:~# netstat -nlp|grep 53
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      20414/systemd-resol
udp        0      0 127.0.0.53:53           0.0.0.0:*                           20414/systemd-resol
root@vultr:~# systemctl disable sysstemd-resolved.service
Failed to disable unit: Unit file sysstemd-resolved.service does not exist.
root@vultr:~# service systemd-resolved stop
root@vultr:~# netstat -nlp|grep 53
root@vultr:~# netstat -nlp|grep 53
udp6       0      0 :::53                   :::*                                20155/java
root@vultr:~#

Beacon指令：

mode dns-txt
checkin