I should think above, below or on the side of the modem it will have its model number. Your Linksys modem will have a number similar to one of these examples: BEFDSR41W, BEFSR11, BEFSRU31, BEFSR41 V1 & V2, BEFSR41 V3, V4 & V5, BEFSR41-CA, BEFSX41-CA, BEFVP41 V1 & V2, BEFVP41-CA, BEFW11P1, BEFW11S4 v2, v3, & v3.2, BEFW11S4-CA V2 & V4, WRT51AB, WRT54G v1.1, v2 & CA, WRV54G-CA The reason I'm asking is that some & particularly Linksys modems tend to have internal firewalls. If you can tell us the model no. then hopefully we can find instructions for that particular model which will allow LW full access both in & outwards.