Ask questions about accessing the Internet on the campus network again

Again, I would like to ask questions about Internet access on the campus network-Linux general technology-Linux technology and application information. The following is a detailed description. Last time, after setting the installation program according to the post in the forum, I found that SELinux Trouble shooter always prompts a warning and cannot access the Internet. Go to the Forum for help. No result is returned.
Now, I disabled the SELinux Trouble shooter service. When I tried to follow the Forum method again, I found that I could connect to the Internet. However, I could only connect three or four seconds, but it would be disconnected, I had to re-verify it again, and then cut off again 3 or 4 seconds later. I had to come here again for help. My operations are as follows:
[Root @ localhost ~] # Linux1x
Start 802.1X authentication
Device check
Server check
Internet Systems Consortium DHCP Client V3.0.6-Fedora
Copyright 2004-2007 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
Wmaster0: unknown hardware address type 801
Wmaster0: unknown hardware address type 801
Listening on LPF/eth0/00: 15: c5: b9: ba: 52
Sending on LPF/eth0/00: 15: c5: b9: ba: 52
Sending on Socket/fallback
DHCPREQUEST on eth0 to register 255.255.255 port 67
DHCPACK from 10.10.15.65
Bound to 10.10.15.80 -- renewal in 40346 seconds.
Pass authentication
Proxy check off
Multi-network-card check on
Http check off
Remain network resource: ��������������0 ���������������������� 1 �� ���� 䣺 13 �� 5 С ʱ 1 �� 42 ��
System notification:
�������������������������������������� • ����������������������������~~~~~~�������� ��������������������������������������������
Run proxy service
You have several devices which are doing network communication
Authentication failed
[Root @ localhost ~] # Linux1x-d
Start 802.1X authentication
Device check
Server check
Internet Systems Consortium DHCP Client V3.0.6-Fedora
Copyright 2004-2007 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/
Wmaster0: unknown hardware address type 801
Wmaster0: unknown hardware address type 801
Listening on LPF/eth0/00: 15: c5: b9: ba: 52
Sending on LPF/eth0/00: 15: c5: b9: ba: 52
Sending on Socket/fallback
DHCPREQUEST on eth0 to register 255.255.255 port 67
DHCPACK from 10.10.15.65
Bound to 10.10.15.80 -- renewal in 39173 seconds.
Pass authentication
[Root @ localhost ~] # Linux1x-v
[Root @ localhost ~] # Linux1x-v
802.1X Supplicant for Linux: Version 2.20-0210
Copyright (C) 2004 Huawei-3Com Technologies Co., Ltd.
Time: 23:12:38 Message: Error: have no valid tive network connection now.
[Root @ localhost ~] #