I haven't read through all the material on dd-wrt, but it seems my original idea wouldn't fit in the model you have..

pag isipan ko pa.. but the suggestion above to really secure the outlet is very practical and doable.. latag lang ng cable and extension na talagang maayos, para maiwasan yung unnecessary na mabatak yung saksakan...

i would also recommend assigning a fixed IP address for the server (nabanggit mo you have servers sa office side ng LAN).. at least that way you have something definite na sure ka lagi yun ang ip address...