Are you a network expert?? | Jan. 18, 2010

techgeek.in

You're working the help desk and get a call that a user can't access the UNIX host at 150.150.32.157. You are on the same subnet as the user and the UNIX host, and try to ping the UNIX host. You can successfully do so. You can also ping the user's workstation. when you ask the user to enter ping 150.150.32.157, all they get is a series of Destination Unreachable messages. What is the problem? What should you do to solve the user's problem?

(note:- the problem seems to be very funny..how such problem can exist? Everything seems to be correct but still the workstation cannot ping 150.150.32.157)

shabbir

Approved.

techgeek.in

Make a small correctn..In the middle of the questn ip address is written 150.150.31.157..Actually it will be 150.150.32.157 throughout..The mistake is implicit i thnk..

shabbir

Corrected that

venami

The host 150.150.32.157 may be dropping all the ICMP requests from the machine from which you are ping-ing. To solve this problem, remove that firewall setting in the host so that your machine can ping the host.

neo_vi

I think it is a gateway problem. The user's machine doesn't have the default gateway set in his PC. to resolve this add the default gateway. In GNU/Linux the command wil be
route add default gw <ip> <interface>

techgeek.in

Quote:

Originally Posted by venami
The host 150.150.32.157 may be dropping all the ICMP requests from the machine from which you are ping-ing. To solve this problem, remove that firewall setting in the host so that your machine can ping the host.

If the host is dropping the the ICMP packets then how the help desk is able to ping the host??

techgeek.in

Quote:

Originally Posted by neo_vi
I think it is a gateway problem. The user's machine doesn't have the default gateway set in his PC. to resolve this add the default gateway. In GNU/Linux the command wil be
route add default gw <ip> <interface>

If there is a gateway problem then how the help desk is getting reply from the workstation on ping-ing the workstation of the user??

techgeek.in

Quote:

Originally Posted by neo_vi
I think it is a gateway problem. The user's machine doesn't have the default gateway set in his PC. to resolve this add the default gateway. In GNU/Linux the command wil be
route add default gw <ip> <interface>

is there any concept of gateway in a subnet???

venami

Quote:

Originally Posted by techgeek.in
If the host is dropping the the ICMP packets then how the help desk is able to ping the host??

We can drop all the ICMP requests that comes from a particular IP address using the firewall settings. So there is a possibility of the host dropping the ICMP requests from the pinging machine and responding to other machines.

techgeek.in Skilled contributor
17Jan2010,19:17	#1
	You're working the help desk and get a call that a user can't access the UNIX host at 150.150.32.157. You are on the same subnet as the user and the UNIX host, and try to ping the UNIX host. You can successfully do so. You can also ping the user's workstation. when you ask the user to enter ping 150.150.32.157, all they get is a series of Destination Unreachable messages. What is the problem? What should you do to solve the user's problem? (note:- the problem seems to be very funny..how such problem can exist? Everything seems to be correct but still the workstation cannot ping 150.150.32.157)

shabbir Go4Expert Founder
18Jan2010,15:46	#2
	Approved.

techgeek.in Skilled contributor
18Jan2010,20:24	#3
	Make a small correctn..In the middle of the questn ip address is written 150.150.31.157..Actually it will be 150.150.32.157 throughout..The mistake is implicit i thnk..

shabbir Go4Expert Founder
18Jan2010,20:35	#4
	Corrected that

venami Ambitious contributor
19Jan2010,08:01	#5
	The host 150.150.32.157 may be dropping all the ICMP requests from the machine from which you are ping-ing. To solve this problem, remove that firewall setting in the host so that your machine can ping the host.

Are you a network expert?? | Jan. 18, 2010

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neo_vi Invasive contributor
19Jan2010,09:27	#6
	I think it is a gateway problem. The user's machine doesn't have the default gateway set in his PC. to resolve this add the default gateway. In GNU/Linux the command wil be route add default gw <ip> <interface>

techgeek.in Skilled contributor
19Jan2010,10:30	#7
	Quote: Originally Posted by venami The host 150.150.32.157 may be dropping all the ICMP requests from the machine from which you are ping-ing. To solve this problem, remove that firewall setting in the host so that your machine can ping the host. If the host is dropping the the ICMP packets then how the help desk is able to ping the host??

techgeek.in Skilled contributor
19Jan2010,10:33	#8
	Quote: Originally Posted by neo_vi I think it is a gateway problem. The user's machine doesn't have the default gateway set in his PC. to resolve this add the default gateway. In GNU/Linux the command wil be route add default gw <ip> <interface> If there is a gateway problem then how the help desk is getting reply from the workstation on ping-ing the workstation of the user??

techgeek.in Skilled contributor
19Jan2010,10:34	#9
	Quote: Originally Posted by neo_vi I think it is a gateway problem. The user's machine doesn't have the default gateway set in his PC. to resolve this add the default gateway. In GNU/Linux the command wil be route add default gw <ip> <interface> is there any concept of gateway in a subnet???

venami Ambitious contributor
19Jan2010,16:26	#10
	Quote: Originally Posted by techgeek.in If the host is dropping the the ICMP packets then how the help desk is able to ping the host?? We can drop all the ICMP requests that comes from a particular IP address using the firewall settings. So there is a possibility of the host dropping the ICMP requests from the pinging machine and responding to other machines.

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