The original post seems to indicate port 80 right after the broadcast address, however according to BroadbandReports.com WakeUp Page, a UDP packet is sent on port 9. Can anyone clarify which port(s) need to be forwarded for WOL to work thru a router? Thanks.

[ Reply to This | # ]

Just about any port you want.

[ Reply to This | # ]

The port you send to is entirely irrelevant. You could send it on another IP protocol such as ICMP that doesn't have ports at all, or on MS or Apple's old systems (NetBEUI/AppleTalk) or even plain raw Ethernet. All that's required is that the network card see a certain sequence of bytes on the wire.

It's common to use UDP port 9 because this is the "Discard" port from the early days of IP. Using this means WOL won't interfere with anything else you might have running. However, using some other port might be handy if it's already opened to allow another service to run. TCP port 80 would be a good example - anyone who runs a Web server would be able to use WOL on 80 without any further configuration.

Pete

[ Reply to This | # ]