Route ALL NTP traffic over a specific WAN

RouterOS General
26

Putting all togheter:

Paste this on terminal (after set the right gateway address)

/ip route
add distance=1 gateway=<put-lte-gateway-IP-address-here> routing-mark=ntp
/ip firewall raw
add action=add-dst-to-address-list address-list=ntp_pool address-list-timeout=none-dynamic chain=prerouting dst-address-list=!ntp_pool dst-port=123 protocol=udp src-port=123
add action=add-dst-to-address-list address-list=ntp_pool address-list-timeout=none-dynamic chain=output dst-address-list=!ntp_pool dst-port=123 protocol=udp src-port=123

Just schedule or launch manually:

/ip firewall address-list
:foreach item in=[find where list="ntp_pool"] do={
    :local ntpip [get $item address]
    /ip route rule
    :if ([:len [find where dst-address="$ntpip/32" and table="ntp"]] = 0) do={
        add dst-address="$ntpip/32" table="ntp"
    }
}