Ubuntu machine not visible on internal network

Ubuntu machine not visible on internal network

I have the following problem. My laptop with Ubuntu can connect to my home
network without any problems, but it's internal IP (10.0.0.5) is not
visible to any other machine on the network. I have tried pinging it from
the other (Windows) computer and an Iphone, no success. Pinging between
other devices works fine. Also this particular device does not show up on
my Netgear router's 'Attached devices' - every other does. What I'm
ultimately trying to do is to connect to JBoss on 8080 from the Windows
machine.
output of ifconfig:
eth0 Link encap:Ethernet HWaddr e0:db:55:e5:4e:7c
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:20 Memory:f7e00000-f7e20000
eth2 Link encap:Ethernet HWaddr 06:0c:ce:84:03:a2
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1011 errors:0 dropped:0 overruns:0 frame:0
TX packets:1011 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:106205 (106.2 KB) TX bytes:106205 (106.2 KB)
rename3 Link encap:Ethernet HWaddr f4:b7:e2:6b:05:f1
inet addr:10.0.0.5 Bcast:10.0.0.255 Mask:255.255.255.0
inet6 addr: fe80::f6b7:e2ff:fe6b:5f1/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:77620 errors:19 dropped:0 overruns:0 frame:142388
TX packets:50939 errors:2 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:107332184 (107.3 MB) TX bytes:6006434 (6.0 MB)
Interrupt:17
I tried installing samba (that's when the 'rename3' interface showed up (I
have no idea what it is) - before eth2 was used), this didn't help either.
I also can't see the Windows machine in 'Browse Network' I don't really
care about that though.
Any help appreciated. Thanks!