:local newaddress
:local dnsip
:set newaddress [/ip address get [/ip address find dynamic=yes interface=("pppoe-out2")] address]
:set dnsip [:pick $newaddress 0 [:find $newaddress "/"]]

:if ([:resolve xxxx.com] != $dnsip ) do={
/tool dns-update name="xxxx.com" address=$dnsip key-name="xxxx" key="xxxx"

}

不要log了，ROS自己会log。

可以双线DDNS