Internet Access on small LAN

[Kevin]

Dear NG:
Windows XP Pro Version 5.1 (Build 2600.xpsp_sp3_gdr.080814-1236 : Service
Pack 3)
Internet Explorer Version: 8.0.6001.18702
No Spybot, No Ad-Aware
AVG free 8.5.323
D-Link DI-704

I have a small Ethernet LAN - 3 Win XP Pro machines - connected through
D-Link.

Computers A and B will connect successfully to the internet, however C will
not.

I can successfully connect to Computer C via Remote Desktop from either A or
B. This leads me to assume, that the problem is NOT a mechanical one.
However I admit that my knowledge of networking is limited.

If I Ping the Default Gateway from Computer C, all the packets time out.
100% loss.
However, I can successfully Ping Computers A or B from C.
If I Ping Computer C from either A or B, again all packets time out. 100%
loss.

DHCP is enabled on the D-Link and all computers. Computers A, B and C all
successfully retrieve IP addresses.

I'm stumped.

-Kevin

 

[smlunatick]

Dear NG:
Windows XP Pro Version 5.1 (Build 2600.xpsp_sp3_gdr.080814-1236 : Service
Pack 3)
Internet Explorer Version: 8.0.6001.18702
No Spybot, No Ad-Aware
AVG free 8.5.323
D-Link DI-704

I have a small Ethernet LAN - 3 Win XP Pro machines - connected through
D-Link.

Computers A and B will connect successfully to the internet, however C will
not.

I can successfully connect to Computer C via Remote Desktop from either Aor
B.  This leads me to assume,  that the problem is NOT a mechanical one.
However I admit that my knowledge of networking is limited.

If I Ping the Default Gateway from Computer C, all the packets time out.
100% loss.
However, I can successfully Ping Computers A or B from C.
If I Ping Computer C from either A or B, again all packets time out.  100%
loss.

DHCP is enabled on the D-Link and all computers.  Computers A, B and C all
successfully retrieve IP addresses.

I'm stumped.

-Kevin

What are the DNS "server" IP addresses on each?

 

[Kevin]

Dear NG:
Windows XP Pro Version 5.1 (Build 2600.xpsp_sp3_gdr.080814-1236 : Service
Pack 3)
Internet Explorer Version: 8.0.6001.18702
No Spybot, No Ad-Aware
AVG free 8.5.323
D-Link DI-704

I have a small Ethernet LAN - 3 Win XP Pro machines - connected through
D-Link.

Computers A and B will connect successfully to the internet, however C
will
not.

I can successfully connect to Computer C via Remote Desktop from either A
or
B. This leads me to assume, that the problem is NOT a mechanical one.
However I admit that my knowledge of networking is limited.

If I Ping the Default Gateway from Computer C, all the packets time out.
100% loss.
However, I can successfully Ping Computers A or B from C.
If I Ping Computer C from either A or B, again all packets time out. 100%
loss.

DHCP is enabled on the D-Link and all computers. Computers A, B and C all
successfully retrieve IP addresses.

I'm stumped.

-Kevin

What are the DNS "server" IP addresses on each?

smlunatick,
Thanks for your reply.
ipconfig /all
DNS Servers 24.29.103.15 and 24.29.103.16 on all 3 machines.
-Kevin

 

[Jack \(MVP-Networking\)]

Hi
Maybe this can Help, http://www.ezlan.net/debug.html
Jack (MS, MVP-Networking)

 

[smlunatick]

What are the DNS "server" IP addresses on each?

smlunatick,
Thanks for your reply.
ipconfig /all
DNS Servers 24.29.103.15 and 24.29.103.16 on all 3 machines.
-Kevin

Good! Then, in Control Panel, check the Firewall "status." Turn it
off on the "C" PC and test again. If it works, then the firewall is
set too "strictly."

 

[Kevin]

Thanks everyone for your suggestions.
It turned out that the D-Link router was the problem. I switched it out
with a new router and I was operational in minutes.
I got quite an education in the past two days on troubleshooting a small
LAN. So all was not lost.
Thanks again,
Kevin