D-Link Modem Not Working With One Computer

[Tomi Häsä]

How is it possible that my D-Link modem is working with one of my Windows XP
computers, but not with the other?

The computers have about the same software, but different manufactures. So,
my D-Link DSL-G624T wireless ADSL modem router is only working with my
Fujitsu Siemens Amilo L7310GW laptop, but not with my HP Pavilion dv5037A
laptop. The HP laptop still works with my old ZyXEL Prestige 660R-61 modem,
so is my HP laptop blocking the MAC address of the D-Link modem router or
something similar?

I have tried these with my HP laptop:

1) Scanned for viruses and spyware with Avira AntiVir PersonalEdition
Classic 8, Ad-Aware 2007, Spybot - Search & Destroy and Windows Defender.
2) Emptied the cache and deleted cookies for all my web browsers.
3) Went to address 192.168.1.1 (D-Link address) and got "Internet Explorer
cannot display the webpage".
4) Pinged 192.168.1.1 and got "Request timed out.".
5) ipconfig /registerdns
6) ipconfig /flushdns
7) ipconfig /release
8) ipconfig /renew
9) netsh winsock reset
10) restarted my computer
11) restarted D-Link
12) reseted D-Link
13) restarted my computer

 

[James Egan]

so is my HP laptop blocking the MAC address of the D-Link modem router or
something similar?

Possibly the other way round.

Check that the wireless encryption settings are the same on both
laptops.

Connect to the router with the laptop that works and check what
wireless settings are required and if mac access control is enabled.

What response do you get from

ipconfig /all


Jim.

 

[Jack \(MVP-Networking\).]

Hi
It might be that the computer is configured to work with the Zyxel with
static IP that does Not match the D-Link sunbet.
Male sure that the HP is set to obtain an IP automatically and that the
D-Link Router DGCP is On.
Jack (MVP-Networking).

 

[Tomi Häsä]

Possibly the other way round.

Check that the wireless encryption settings are the same on both
laptops.

Connect to the router with the laptop that works and check what
wireless settings are required and if mac access control is enabled.

What response do you get from

ipconfig /all

Wireless settings are the same for both computers. I can't find any MAC
access control settings. By the way, when I said wireless and wired
connections with the HP laptop are not working, I still can use a static IP
address 192.168.1.2 to change the D-Link settings using _wire_ and I can
also access the D-Link settings _wirelessly_ immediately after rebooting
using the default unsecured wireless connection. According to the "ipconfig
/all" info (when using D-Link) the subnet masks are incorrect -- how do I
change them?

Here's the "ipconfig /all" info:

C:\>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : hplp-da26fb0b4b
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom 802.11b/g WLAN
Physical Address. . . . . . . . . : 00-14-A5-65-95-4E
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 0.0.0.0
Subnet Mask . . . . . . . . . . . : 0.0.0.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 255.255.255.255

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast
Ethernet NIC
Physical Address. . . . . . . . . : 00-16-D4-9D-E5-67
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Autoconfiguration IP Address. . . : 169.254.245.64
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . : 169.254.245.64

=== === ===

I have made the new D-Link modem router settings more similar to the older
Zyxel modem settings (but they are different machines, of course), see below
(D-Link doesn't work with the "Bridge Mode" setting, so I'm using the
"Dynamic IP Address" setting instead).

Settings for my D-Link DSL-G624T wireless ADSL modem router:

ADSL Setup
- WAN Connection: Pvc0
- VPI: 0
- VCI: 100
- Virtual Circuit: Enable
- (*) Dynamic IP Address
- Connection Type: 1483 Bridged IP LLC
- MTU: 1400
- Default Route: Enable
- NAT: Disable
- Firewall: Disable
Wireless Setup
- Enable Wireless: [x]
- SSID: TH_NET
- VLAN ID: 0
- Priority: 0
- Channel: 6
- Security Mode: WPA
- Pre-Shared Key: WPA Password
LAN Setup
- IP Address: 192.168.1.1
- Subnet Mask: 255.255.255.0
- (*) No DHCP
Time and Date
- (*) Automatic (Simple Network Time Protocol)
- Time Zone: (GMT+02:00) Helsinki,Riga,Tallinn
- Daylight Saving: (*) Disabled
- NTP Server Address: fi.pool.ntp.org (oletus: ntp1.dlink.com)
QoS Setup
- IGMP Proxy/Snooping: PVC0 (*) Disabled
- QoS Configuration: (*) None
DNS Setup
- DNS Relay Selection: Use Auto Discovered DNS Server Only
Firewall & DMZ
- DoS Protection: (*) Disabled
- Port Scan Protection: (*) Disabled
- Enable DMZ: (*) Disabled
Advanced ADSL
- Modulation Type: ADSL2+ (Multi-Mode)
Advanced Wireless
- Beacon Interval: 200
- DTIM Period: 2
- Hidden SSID: [ ] Enabled
- Antenna transmit power: Full
- RTS Threshold: 2347
- Frag Threshold: 2346
- b/g Mode: Mixed
- 4x: [ ] Enabled
- Wireless Management Settings: (*) Access List
Advanced LAN
- Enable UPnP: [ ]
- Available Connections: Pvc0 ( ), Pvc1 ( ), Pvc2 ( ), Pvc3 ( ), Pvc4 ( ),
Pvc5 ( ), Pvc6 ( ), Pvc7 ( )
Remote Management
- Remote Web Management: (*) Disabled
- Remote Telnet Management: (*) Disabled
- Remote SSH Management: (*) Disabled

=== === ===

Settings for my ZyXEL Prestige 660R-61 modem:

LAN
- DHCP: None
- IP Address: 192.168.1.1
- IP Subnet Mask: 255.255.255.0
- RIP Direction: None
- RIP Version: N/A
- Multicast: None
WAN
- Mode: Bridge
- Encapsulation: RFC 1483
- Multiplex: LLC
- VPI: 0
- VCI: 100
- ATM QoS Type: UBR
- Cell Rate
- Peak Cell Rate: 0 cell/sec
- Sustain Cell Rate: 0 cell/sec
- Maximum Burst Size: 0
- NAT -> Network Address Translation: None
Security
- [ ] Telnet (Telnet traffic is blocked from the WAN to the LAN)
- [ ] FTP (FTP traffic is blocked from the WAN to the LAN)
- [ ] TFTP (TFTP traffic is blocked from the WAN to the LAN)
- [ ] Web (Web traffic is blocked from the WAN to the LAN)
- [ ] SNMP (SNMP traffic is blocked from the WAN to the LAN)
- [ ] Ping (Ping traffic is blocked from the WAN to the LAN)
Dynamic DNS
- [ ] Active
- Service Provider: WWW.DynDNS.ORG
Time And Date
- Use Protocol when Bootup: NTP (RFC-1305)
- IP Address or URL: fi.pool.ntp.org
- Time and Date: (GMT+02:00) Athens, Helsinki, Istanbul, Cairo, Eastern
Europe, Israel
- [ ] Daylight Savings
UPnP
- [ ] Enable the Universal Plug and Play(UPnP) Service
- [ ] Allow users to make configuration changes through UPnP

 

[James Egan]

Wireless settings are the same for both computers. I can't find any MAC
access control settings. By the way, when I said wireless and wired
connections with the HP laptop are not working, I still can use a static IP
address 192.168.1.2 to change the D-Link settings using _wire_ and I can
also access the D-Link settings _wirelessly_ immediately after rebooting
using the default unsecured wireless connection. According to the "ipconfig
/all" info (when using D-Link) the subnet masks are incorrect -- how do I
change them?

You're getting an apipa address and mask which is what the computer
defaults to when it cannot connect with the dhcp server. That's not
the problem. It just confirms it's a wireless problem probably with
encryption.

You say the settings are the same on the working and not working
computers. What are they specifically? And what is the router set up
to use?

If you're using wpa-psk encryption ensure you have the correct setting
for aes or tkip. Some hardware can't handle aes so you might have to
use tkip.


Jim.

 

[Tomi Häsä]

You're getting an apipa address and mask which is what the computer
defaults to when it cannot connect with the dhcp server. That's not
the problem. It just confirms it's a wireless problem probably with
encryption.

You say the settings are the same on the working and not working
computers. What are they specifically? And what is the router set up
to use?

If you're using wpa-psk encryption ensure you have the correct setting
for aes or tkip. Some hardware can't handle aes so you might have to
use tkip.

The LAN and WLAN connections now seem to work with the HP laptop also! With
D-Link I tested several different setting combinations one by one, for
example I enabled DHCP Server, then Virtual Circuit, and finally NAT, and
then connections with both of my computers worked except the _wired_
connection with HP laptop, so I looked what was different and enabled
"Client for Microsoft Networks" and "File and Pinter Sharing for Microsoft
Networks" in Network Connections, but what is strange is that my ISP told me
to disable them in Windows in year 2007, but maybe the ISP's network
settings have changed again.

My D-Link DSL-G624T might have a bug when you try to use WEP. First of all,
I can't make D-Link's WEP work (I have tried 64bits and 256bits WEP keys
with both of my computers), and when I change back to WPA, all my
connections, wired and wireless with both of my computers stop working. Only
restarting (unplugging power adapter and then plugging it in again) D-Link
seems to work (restarting my computers isn't enough).

And, by the way, here are my network related settings in both of my Windows
XP laptops in case someone is interested in them:

(1) _Wireless_ Settings

Control Panel: Network Connections: Wireless Network Connection: General
[x] Client for Microsoft Networks
[x] File and Pinter Sharing for Microsoft Networks
[x] QoS Packet Scheduler
[x] Internet Protocol (TCP/IP)

Wireless Network Connection: Internet Protocol (TCP/IP)
- Properties
- (*) Obtain an IP address automatically
- (*) Obtain DNS server address automatically
- Advanced
- IP Settings: - DHCP Enabled
- [x] Automatic metric
- DNS: (*) Append primary and connection specific DNS suffixes
[x] Append parent suffixes of the primary DNS suffix
[x] Register this connection's addresses in DNS
- WINS: - [x] Enable LMHOSTS lookup
- NetBIOS setting: (*) Default: Use NetBIOS setting from the DHCP
server. If static IP address is used or the DHCP server does
not provide NetBIOS setting, enable NetBIOS over TCP/IP.
- Options: TCP/IP Filtering: - [ ] Enable TCP/IP Filtering (All adapters)
- Permit All (TCP Ports, UDP Ports, IP
Protocols)

My TH_NET network info according to Network Connections: TH_NET: Properties
- Association: - Network name (SSID): TH_NET
- Network Authentication: WPA-PSK
- Data encryption: TKIP
- Authentication: - [x] Authenticate as computer when computer information
is available {note: this option is grayed out}

(2) _Wired_ Settings

Control Panel: Network Connections: Local Area Connection: General
[x] Client for Microsoft Networks
[x] File and Pinter Sharing for Microsoft Networks
[x] QoS Packet Scheduler
[x] Internet Protocol (TCP/IP)

Local Area Connection: Internet Protocol (TCP/IP)
- Properties
- (*) Obtain an IP address automatically
- (*) Obtain DNS server address automatically
- Advanced
- IP Settings: - DHCP Enabled
- [x] Automatic metric
- DNS: (*) Append primary and connection specific DNS suffixes
[x] Append parent suffixes of the primary DNS suffix
[x] Register this connection's addresses in DNS
- WINS: - [x] Enable LMHOSTS lookup
- NetBIOS setting: (*) Default: Use NetBIOS setting from the DHCP
server. If static IP address is used or the DHCP server does
not provide NetBIOS setting, enable NetBIOS over TCP/IP.
- Options: TCP/IP Filtering: - [ ] Enable TCP/IP Filtering (All adapters)
- Permit All (TCP Ports, UDP Ports, IP
Protocols)

Local Area Connection: Authentication
- [x] Enable IEEE 802.1x authentication for this network
- EAP type: Smart Card or other Certificate
- [x] Authenticate as computer when computer information is available

 

[James Egan]

connection with HP laptop, so I looked what was different and enabled
"Client for Microsoft Networks" and "File and Pinter Sharing for Microsoft
Networks" in Network Connections, but what is strange is that my ISP told me
to disable them in Windows in year 2007, but maybe the ISP's network
settings have changed again.

File and printer sharing is nothing to do with this issue. If you
don't need to share files disable it.

My D-Link DSL-G624T might have a bug when you try to use WEP. First of all,
I can't make D-Link's WEP work (I have tried 64bits and 256bits WEP keys
with both of my computers),

WEP is no longer acceptable for wireless security. You need to get
your network working with WPA.

and when I change back to WPA, all my
connections, wired and wireless with both of my computers stop working. Only
restarting (unplugging power adapter and then plugging it in again) D-Link
seems to work (restarting my computers isn't enough).

WPA has nothing at all to do with wired connections. Are you trying to
connect wired and wirelessly from the same computer on the same subnet
or something like that? If so, disable wired if you're using wireless.
Don't try and use both at the same time.

My advice would be to reset everything back to factory defaults in
case you've changed some setting inadvertantly then visit the various
websites to get the latest firmware upgrades for your routers and
wireless computer network devices to enable you to use (as a minimum)
WPA-PSK with TKIP.


Jim.

 

[Tomi Häsä]

WEP is no longer acceptable for wireless security. You need to get
your network working with WPA.

I have some entertainment machines also (Xbox 360, PS3, Wii, Nintendo DS
Lite, and Sony PSP), and Nintendo DS Lite seems to use WEP, so I thought
having a try with WEP as I have no important information in that handheld.
=)

WPA has nothing at all to do with wired connections. Are you trying to
connect wired and wirelessly from the same computer on the same subnet
or something like that? If so, disable wired if you're using wireless.
Don't try and use both at the same time.

I'm a bit paranoid about using wireless connection (crackers find a way
eventually to brake WPA keys also, I predict), so I still prefer using wired
connection with my computers and wireless connection with my entertainment
machines.

My advice would be to reset everything back to factory defaults in
case you've changed some setting inadvertantly then visit the various
websites to get the latest firmware upgrades for your routers and
wireless computer network devices to enable you to use (as a minimum)
WPA-PSK with TKIP.

I have tried upgrading my firmware using Microsoft Update, but at least with
my older ZyXEL modem, the connection stopped working in year 2007 (I
reported the problem to ZyXEL), so I think I will make a backup copy of my
Windows computers before doing that.