I've been around here before and I could usually piece together everything to more or less get myself up and running, but this time I'm truly stumped.

I'm trying to connect my new 14.04 install to a network, and I'm forced to be behind my college's router. Now I've tested the vary cable that is right now plugged into my Ubuntu box on a Windows, Mac OS X, and even my friend's Ubuntu 14.04 box, and they all connect no problem. I've been trying to track this down for about two days, but every time I get close to it, the bug jumps to some other piece of my connection.

Anyway, as it sits ifconfig -a gives:

eth2    Lninkencap:Ethernet  HWaddr:00:1f:bc:08:31:1d
        inet addr:10.32.51.51 Bcast:10.32.51.155 Mask: 255.255.255.0
        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
        RX bytes:0 TX bytes:0

as well as the local loopback, but I'm assuming that is not an issue here.

sudo dhclient -v eth2 returns:

Listening on LPF/<hardware address of my integrated NIC, above>
Sending on <same>
Sending on Socket/fallback
DHCPREQUEST of 10.32.51.51 on eth2 to 255.255.255.255 port 67 (xid=0x6f4a66ba)
<two more lines of same>
DHCPDISCOVER on eth2 to 255.255.255.255 port 67 interval 3 (xid=0x156f9fb4)
<many more of above with varying intervals>
No DHCPOFFERS received.
Trying recorded lease 10.32.51.51
RTNETLINK answers: File exists
bound: renewal in <large number> seconds

If I then try ping 8.8.8.8, I get:

connect: Network is unreachable

/etc/resolv.conf only contains the two lines telling you not to edit it, while /etc/network/interfaces only has the loopback interface block in it. I've tried commenting out the "option rfc3442" line in /etc/dhcp/dhclient.conf which seemed to fix this issue for many people, as well as adding the line

send vendor-class-indentifier "MSFT5.0"

to dhclient.conf as well to tell the router I'm a windows box, in case they don't like Linux.

Finally, route -n reveals:

Destination     Gateway     Genmask           Flags     Metric    Ref     Use     Iface
10.32.51.0      0.0.0.0     255.255.255.0     U         0         0       0       eth2

I would like to apologize in advance for the doubtless butchered text alignment, but I'm obviously typing this all by hand, reading from the terminal as I type commands. I'm hoping this is an interesting problem, and not something I blithely stumbled past in my (apparent) over-confidence.

TIA!

Quick addendum before posting: The activity light on the ethernet port are lit and one blinks during boot, but they rarely (and seemingly randomly) do so afterwards (both are dark) even while running dhclient in the foreground. When I had the Ubuntu box tethered to my MacBook earlier, I got what looked like a normal power/uplink blinking pattern, but was unable to ping one from the other.