Connection mode for Wake on Wan?

People, I make the following query. I am trying to turn on my PC by Wake On Wan, but my provider's router won't let me edit the ARP Table, so the router cleans up the entry containing the MAC address and stops working. My idea is to connect my WR941ND with OpenWrt to my provider's router, but the question is, in which way should I connect it? Thank you so much!