Ethernet Adapter Problems

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I am running Fedora 20 (64-bit) with kernel 3.15.7-200.fc20.x86_64. The ethernet adapter is a Qualcomm Atheros AR8162. The output of ifconfig is:

em1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet6 fe80::28c:faff:fe65:57c5  prefixlen 64  scopeid 0x20<link>
        ether 00:8c:fa:65:57:c5  txqueuelen 1000  (Ethernet)
        RX packets 506008  bytes 387032847 (369.1 MiB)
        RX errors 3  dropped 1  overruns 3  frame 0
        TX packets 103458  bytes 15283165 (14.5 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 16  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 6827  bytes 541916 (529.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6827  bytes 541916 (529.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlp2s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.8  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::26fd:52ff:fe7c:dc7a  prefixlen 64  scopeid 0x20<link>
        ether 24:fd:52:7c:dc:7a  txqueuelen 1000  (Ethernet)
        RX packets 1854223  bytes 2764917834 (2.5 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1056396  bytes 95087957 (90.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I can connect to the wired network at school but I cannot connect at home. I know it is not my ethernet cable or my router as I can connect with a Windows 7 computer at home. Since I can connect at school, my ethernet adapter works but I don't have any idea why I can't connect at home. Any ideas what it could be?

I do not know what setup my university runs for the wired network except that I had to register my laptop on their website. At home, I have a Motorola SURFboard SB5101N cable modem and a Netgear N300 WNR2000v4 wireless router. My laptop is a Toshiba Satellite C50-A.

EDIT:

I do not have any proxy setup. Connected to the school network the output of ifup em1 is:

/usr/sbin/ifup: configuration for em1 not found.
Usage: ifup <configuration>

Apparently ethtool is the right one. The output of ethtool em1 is:

Settings for em1:
    Supported ports: [ TP ]
    Supported link modes:   10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
    Supported pause frame use: Symmetric Receive-only
    Supports auto-negotiation: Yes
    Advertised link modes:  10baseT/Half 10baseT/Full 
                            100baseT/Half 100baseT/Full 
                            1000baseT/Full 
    Advertised pause frame use: Symmetric
    Advertised auto-negotiation: Yes
    Speed: 100Mb/s
    Duplex: Full
    Port: Twisted Pair
    PHYAD: 0
    Transceiver: internal
    Auto-negotiation: on
    MDI-X: Unknown
Cannot get wake-on-lan settings: Operation not permitted
    Current message level: 0x000060e4 (24804)
                   link ifup rx_err tx_err hw wol
    Link detected: yes

I'll post the outputs while connected at home tonight.

EDIT:

While connected at home with the ethernet ... (more)