I have a Windows 7 x64 PC with NBEclipse 2.5.2 that is connected directly to a Linksys WRT54G2 running the DDWRT firmware. If I connect a PK70 Netburner directly to the Linksys, I can ping it, and I can do an auto-update, but when I scan for Netburner devices on the network, it doesn't show up. If I put a switch between the Netburner and the Linksys (using the same port on the Linksys), I can then scan the network and find the device.
Obviously this isn't an issue for me because I found a workaround, but this seems very obscure. Since I'm connecting the switch to the same port on the Linksys that the Netburner was connected to, it doesn't appear to be an issue with the Linksys doing packet filtering between two ports.
-Lance