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network connection issue

Posted on 2006-06-23
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Last Modified: 2010-03-19
I have a test network that consists of:

3 computers connetec through D-Link Switch, they are all static IP

Computer 1 TCP/IP
IP                       192.168.0.4
Subnet mask        255.255.255.0
Default Gateway: 192.168.0.1
Preferred DNS 192.168.0.4


Computer 2 TCP/IP
IP                       192.168.0.3
Subnet mask        255.255.255.0
Default Gateway: 192.168.0.1
Preferred DNS :   192.168.0.4

Computer 3 TCP/IP
IP                       192.168.0.2
Subnet mask        255.255.255.0
Default Gateway: 192.168.0.1
Preferred DNS 192.168.0.4

Note that 192.168.0.1 is an IP of DSL router so that 3 computers connect to internet, in fact they all connect to internet.

From computer 1 I can ping 192.168.0.1 , 192.168.0.2, but NOT 192.168.0.3
From computer 2 I can ping them all  192.168.0.1 , 192.168.0.2, ,192.168.0.4
From computer 3 I can ping 192.168.0.1 , 192.168.0.4, but NOT 192.168.0.3


I would like to have all the computers able to ping each other.
Any idea?

thanks



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Question by:jskfan
9 Comments
 
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by:zephyr_hex
zephyr_hex earned 50 total points
ID: 16973261
what is the status of the firewall on each computer?
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by:b0lsc0tt
b0lsc0tt earned 50 total points
ID: 16973306
jskfan,

Actually it seems like it is only one computer that does not respond to the ping (Computer 2 - 192.168.0.3).  Use Zephyr's comments but I would especially look at that computer's firewall program or settings.  Give us specifics of that computer if you need details (OS and firewall programs).

b0lsc0tt
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by:Chris_Picciotto
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ID: 16973347
Turn off the windows firewall and any other 3rd party program that might block PINGS on computer 3. THen try.
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by:ttist25
ttist25 earned 50 total points
ID: 16973470
I agree.  It's most likely a firewall issue.  

But, why are you pointing to .4 for DNS?
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by:ttist25
ID: 16973475
Is .4 a domain controller?
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by:ECNSSMT
ID: 16973506
yeah like everyone says computer 2; 192.168.0.3 probably has a firewall enabled.  WinXP has a builtin firewall that is enabled by default.  If that this the case

Go to START > Control Panel > Network Connections > your active NIC > Properties > Advance > Windows Firewall > Settings >* Advance, choose "Allow Incoming ECHO Request".  Click OK, OK, OK, etc until you are back at the desktop

*Note in the General Tab radio button for Firewall is ON by default.

Hope it helps,

Regards,
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Author Comment

by:jskfan
ID: 16974530
I found the solution for the issue, it was simple but weird.

the computer that has 192.168.0.3 had the time clock different than other computers. I just adjusted it and now all computers can ping each other.

How I did pay attention to the clock?? because I woke up too early and saw in my wall clock the time was 3:xx am  and on the computer 1:xx am .

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by:ECNSSMT
ECNSSMT earned 50 total points
ID: 16975275
sounds good to me; but just realize that the clock does nothing more than keep time; there is no corrrelation between time and network, except "I don't like the idea of downloading a file taking forever".

Regards,
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Accepted Solution

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ajortolani earned 50 total points
ID: 16975360
The time clock shouldn't affect network connectivity as pertained to internet connection, however if the computers are on a domain they need to have the same time settings as the domain controller or else they can't log onto the domain. This could potentially cause the controller not to lease the address to the workstations. Kind of weird but possible.

Good luck
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