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Wireless LAN, I cannot access the Internet anymore. I had access to the Internet with the NWA

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Chapter 12 Troubleshooting I cannot access the Internet anymore. I had access to the Internet (with the NWA), but my Internet connection is not available anymore. 1 Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick Start Guide and Section 1.7 on page 18. 2 Reboot the NWA. 3 If the problem continues, contact your ISP or network administrator. The Internet connection is slow or intermittent. 1 There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.7 on page 18. If the NWA is sending or receiving a lot of information, try closing some programs that use the Internet, especially peer-to-peer applications. 2 Check the signal strength. If the signal is weak, try moving the NWA (in wireless client mode) closer to the AP (if possible), and look around to see if there are any devices that might be interfering with the wireless network (microwaves, other wireless networks, and so on). 3 Reboot the NWA. 4 If the problem continues, contact the network administrator or vendor, or try one of the advanced suggestions. Advanced Suggestions • Check the settings for QoS. If it is disabled, you might consider activating it. 12.4 Wireless LAN I cannot access the NWA or ping any computer from the WLAN. 1 Make sure the wireless LAN is enabled on the NWA. 2 Make sure the wireless adapter on the wireless station is working properly. 3 Make sure the wireless adapter installed on your computer is IEEE 802.11 compatible and supports the same wireless standard as the NWA. 4 Make sure your computer (with a wireless adapter installed) is within the transmission range of the NWA. 126 NWA1120 Series User's Guide

Section	Page
NWA1120 Series	1
Contents Overview	3
Table of Contents	5
User’s Guide	9
Introducing the NWA	11
1.1 Introducing the NWA	11
1.1.1 Dual-Band	12
1.2 Wireless Modes	12
1.2.1 MBSSID	12
1.2.2 Wireless Client	13
1.2.3 Root AP	15
1.2.4 Repeater	15
1.3 Ways to Manage the NWA	16
1.4 Configuring Your NWA’s Security Features	17
1.4.1 Control Access to Your Device	17
1.4.2 Wireless Security	17
1.5 Good Habits for Managing the NWA	17
1.6 Hardware Connections	18
1.7 LED	18
Introducing the Web Configurator	19
2.1 Accessing the Web Configurator	19
2.2 Resetting the NWA	20
2.2.1 Methods of Restoring Factory-Defaults	21
2.3 Navigating the Web Configurator	22
2.3.1 Title Bar	22
2.3.2 Navigation Panel	23
2.3.3 Main Window	24
Dashboard	25
3.1 The Dashboard Screen	25
Tutorial	29
4.1 How to Configure the Wireless LAN	29
4.1.1 Choosing the Wireless Mode	29
4.1.2 Further Reading	29
4.2 How to Configure Multiple Wireless Networks	29
4.2.1 Configure the SSID Profiles	31
4.2.2 Configure the Standard Network	33
4.2.3 Configure the VoIP Network	34
4.2.4 Configure the Guest Network	36
4.2.5 Testing the Wireless Networks	38
4.3 NWA Setup in AP and Wireless Client Modes	38
4.3.1 Scenario	38
4.3.2 Configuring the NWA in MBSSID or Root AP Mode	39
4.3.3 Configuring the NWA in Wireless Client Mode	42
4.3.4 MAC Filter Setup	44
4.3.5 Testing the Connection and Troubleshooting	45
Technical Reference	47
Monitor	49
5.1 Overview	49
5.2 What You Can Do	49
5.3 View Logs	49
5.4 Statistics	50
5.5 Association List	51
5.6 Channel Usage	52
Wireless LAN	55
6.1 Overview	55
6.2 What You Can Do in this Chapter	55
6.3 What You Need To Know	56
6.4 Wireless Settings Screen	60
6.4.1 Root AP Mode	61
6.4.2 Repeater Mode	65
6.4.3 Wireless Client Mode	68
6.4.4 MBSSID Mode	71
6.5 SSID Screen	74
6.5.1 Configuring SSID	75
6.6 Wireless Security Screen	76
6.6.1 Security: WEP	78
6.6.2 Security: WPA, WPA2, WPA2-MIX	79
6.6.3 Security: WPA-PSK, WPA2-PSK, WPA2-PSK-MIX	81
6.7 RADIUS Screen	82
6.8 Layer-2 Isolation	84
6.8.1 Layer-2 Isolation Screen	85
6.9 MAC Filter Screen	86
6.10 Technical Reference	88
6.10.1 Additional Wireless Terms	89
6.10.2 WMM QoS	89
6.10.3 Security Mode Guideline	90
LAN	91
7.1 Overview	91
7.2 What You Can Do in this Chapter	91
7.3 What You Need to Know	91
7.4 LAN IP Screen	93
VLAN	95
8.1 Overview	95
8.1.1 What You Can Do in This Chapter	95
8.2 What You Need to Know	95
8.3 VLAN Screen	96
System	97
9.1 Overview	97
9.2 What You Can Do in this Chapter	97
9.3 What You Need To Know	98
9.4 WWW Screen	100
9.5 Certificates Screen	101
9.6 Telnet Screen	102
9.7 SNMP Screen	104
9.8 FTP Screen	106
9.9 Technical Reference	107
9.9.1 MIB	107
9.9.2 Supported MIBs	108
9.9.3 Private-Public Certificates	108
9.9.4 Certification Authorities	108
9.9.5 Checking the Fingerprint of a Certificate on Your Computer	109
Log Settings	111
10.1 Overview	111
10.2 What You Can Do in this Chapter	111
10.3 What You Need To Know	112
10.4 Log Settings Screen	112
Maintenance	115
11.1 Overview	115
11.2 What You Can Do in this Chapter	115
11.3 What You Need To Know	116
11.4 General Screen	116
11.5 Password Screen	117
11.6 Time Screen	118
11.7 Firmware Upgrade Screen	119
11.8 Configuration File Screen	120
11.8.1 Backup Configuration	120
11.8.2 Restore Configuration	120
11.8.3 Back to Factory Defaults	121
11.9 Restart Screen	121
Troubleshooting	123
12.1 Power, Hardware Connections, and LEDs	123
12.2 NWA Access and Login	124
12.3 Internet Access	125
12.4 Wireless LAN	126
Setting Up Your Computer’s IP Address	129
Pop-up Windows, JavaScript and Java Permissions	157
IP Addresses and Subnetting	169
IPv6	177
Wireless LANs	187
Legal Information	201

Match case Limit results 1 per page

Chapter 12 Troubleshooting

NWA1120 Series User’s Guide

126

I cannot access the Internet anymore. I had access to the Internet (with the NWA), but my

Internet connection is not available anymore.

Check the hardware connections, and make sure the LEDs are behaving as expected. See the Quick

Start Guide and

Section 1.7 on page 18

Reboot the NWA.

If the problem continues, contact your ISP or network administrator.

The Internet connection is slow or intermittent.

There might be a lot of traffic on the network. Look at the LEDs, and check

Section 1.7 on page 18

If the NWA is sending or receiving a lot of information, try closing some programs that use the

Internet, especially peer-to-peer applications.

Check the signal strength. If the signal is weak, try moving the NWA (in wireless client mode) closer

to the AP (if possible), and look around to see if there are any devices that might be interfering with

the wireless network (microwaves, other wireless networks, and so on).

Reboot the NWA.

If the problem continues, contact the network administrator or vendor, or try one of the advanced

suggestions.

Advanced Suggestions

•

Check the settings for QoS. If it is disabled, you might consider activating it.

12.4

Wireless LAN

I cannot access the NWA or ping any computer from the WLAN.

Make sure the wireless LAN is enabled on the NWA.

Make sure the wireless adapter on the wireless station is working properly.

Make sure the wireless adapter installed on your computer is IEEE 802.11 compatible and supports

the same wireless standard as the NWA.

Make sure your computer (with a wireless adapter installed) is within the transmission range of the

NWA.