wpa_supplicant 在 ubuntu 16.04 上无法正常工作

Question

sudo iw wlp2s0 link                                                             
[sudo] password for aadesh: 
Connected to f0:3e:90:38:76:d8 (on wlp2s0)
    SSID: RAM
    freq: 2472
    RX: 4191824 bytes (17917 packets)
    TX: 196641 bytes (1161 packets)
    signal: -48 dBm
    tx bitrate: 72.2 MBit/s MCS 7 short GI

    bss flags:  short-preamble short-slot-time
    dtim period:    1
    beacon int: 100

上述命令显示已连接，但我无法访问我所在大学的 dc++ 网络之外的任何网站。

这是我的 wpa_supplicant.conf 文件：

ctrl_interface=/run/wpa_supplicant
update_config=1

network={
  ssid="RAM"
  scan_ssid=1
  key_mgmt=WPA-EAP
  identity="id"
  password="psk"
  eap=PEAP
  phase1="peaplabel=0"
  phase2="auth=MSCHAPV2"
}