Mikrotik dual wan failover script

Mikrotik Multi wan failover script

# Script Starts here...
# Internet Host to be checked You can modify them as per required, JZ
:local host1   "8.8.8.8"
:local host2   "208.67.222.123"
 
# Do not modify data below without proper understanding.
:local i 0;
:local F 0;
:local date;
:local time;
:global InternetStatus;
:global InternetLastChange;
 
# PING each host 5 times
:for i from=1 to=5 do={
if ([/ping $host1 count=1]=0) do={:set F ($F + 1)}
if ([/ping $host2 count=1]=0) do={:set F ($F + 1)}
:delay 1;
};
 
# If both links are down and all replies are timedout, then link is considered down
:if (($F=10)) do={
:if (($InternetStatus="UP")) do={
:log error "WARNING : The INTERNET link seems to be DOWN. Please Check";
:set InternetStatus "DOWN";
 
##      ADD YOUR RULES HERE, LIKE ROUTE CHANGE OR WHAT EVER IS REQUIRED, Example is below ...
##     /ip route set [find comment="Default Route"] distance=3
##     /ip firewall nat disable [find comment="Your Rules, Example"]
 
:set date [/system clock get date];
:set time [/system clock get time];
:set InternetLastChange ($time . " " . $date);
} else={:set InternetStatus "DOWN";}
} else={
 
##      If reply is received , then consider the Link is UP
:if (($InternetStatus="DOWN")) do={
:log warning "WARNING :The INTERNET link have been restored";
:set InternetStatus "UP";
 
##      ADD YOUR RULES HERE, LIKE ROUTE CHANGE OR WHAT EVER IS REQUIRED, Example is below ...
##     /ip route set [find comment="Default Route"] distance=1
##     /ip firewall nat enable  [find comment="Your Rules, Example"]
 
:set date [/system clock get date];
:set time [/system clock get time];
:set InternetLastChange ($time . " " . $date);
} else={:set InternetStatus "UP";}
}
 
# Script Ends Here.
# Thank you