I just picked up a DSR6000 and I have it running xtreme 252 with an airnet (I know it's slow, but I had one laying around).

I cannot ping the tivo from any network device on my LAN. But, if I serial bash into the unit it can ping everything on my LAN. I also cannot telnet or ftp into the unit (the daemons are running).

here is my rc.net file:

if /sbin/insmod -f /lib/modules/airnet.o devicename=eth1 ssid=XXXX timing=7 ;
/sbin/ifconfig eth1 xxx.xxx.xxx.xxx netmask up

here is the output from route -n

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
xxx.xxx.xxx.xxx U 32767 0 0 eth1