In CoRE, using IFTTT’s Maker channel:
IF
IFTTT event 'ring' was executed
AND
Porch Light switch is off <<< this ensures the light is only turned on, wait, off IF it was already off at ring time
AND
(as required, aditional conditions like time of day etc.)
THEN
Using Porch Light...
> Turn on
> Wait 2 minutes
> Turn off
See more info on how to use the Maker channel and listen for the event in CoRE here.