asked on

about PING

here is the configuration of my network

----- wireless LAN ---------
| A | ----------------------- | server| --- internet
----- ----------
|
| wireless LAN
|
-----
| B |
-----
IP :
A : 192.168.1.10
B : 192.168.1.14
server : 192.168.1.1

my question is:
when I tried to ping B (from A), there is no respond, can anybody explain this?
(I want to make a ftp server in B, which can be accessed from A)

note:
even I (from A) can connect to internet (which mean that A connect to server), the server doesn't respond the ping

liddler

Have you got firewalls on the server / clients? If so ensure that ping is allowed thorugh. Check the firewall logs to see if pings are being dropped

nk2003

ASKER

for information, I can ping another address (like yahoo.com)
but my problem here is to ping, B (from A) which is on local network

qwaletee

It is not clear from this what your setup is. It could be:

A ----||
||
*Hub* ----- Server ---- internet
||
B ----||

In which case nothing but a software firewall could be blocking traffic. Same would apply if you replace *Hub* with *Switch*

If you replace *Hub* with *Router* or *Firewall* then yo could hav the hardware blocking access.

Another possible configuration:

A ----||
||
*Server - NIC #1*
|||
****Server**** ==== *Server NIC #3* ------ internet
|||
*Server - NIC #2*
||
B ----||

In this setup, teh srever acts as a router. But if it does not properly bridge or route packets from one segment (NIC) to another, you would have connectivity problems.

qwaletee

Wait, ddn't notice he wirel;ess part. Your configuration is probably:

A .......... *Server*
. |||
. |||
*Wireless router+internet gateway* >>>>>>> internet
.
.
B ..........
||
B ----||

qwaletee

Oops...

A .......... *Server*
. |||
. |||
*Wireless router+internet gateway* >>>>>>> internet
.
.
B ..........

nk2003

ASKER

actualy, I don't know the exact configuration, because i don't have access to it
so IF the configuration is like the last, I cannot connect from A, to B?

so if i still want to connect from A to B, what should i do?

liddler

try (from A):
tracert 192.168.1.14
What do you get

Huseyin1

it could be that "B" has the firewall!

JFrederick29

Can you connect to other services on the server? What kind of server is it? If Web or FTP server try to connect using those services to rule out a firewall like the others suggest.

nk2003

ASKER

here is the result of traceroute
from 192.168.1.12 (A) to 192.168.1.10 (B)

traceroute to 192.168.1.10 (192.168.1.10), 30 hops max, 38 byte packets
1 192.168.1.12 (192.168.1.12) 2998.863 ms !H 2999.610 ms !H 2999.947 ms !H

for information, that there is no firewall in B, i'm sure about this

and i dont know what are the other services the server have (i only used that server to connect to internet/gateway)

liddler

This looks like the traffic is blocked, either by a firewall on A or B or an ACL (access Control List) in the wireless router

praflik

Can you ping A and B from the server?

mikeleebrla

Have you people ever heard of subnets? HELLO? A and B should be 2 different subnets with a router (or in this case a server acting as a router) between them. Set up one subnet with 192.168.1.x and a subnet mask of 255.255.255.0 and the B with 192.168.2.x and a subnet mask of 255.255.255.0. This will give you 2 seperate subnets in a private range, not one big subnet. The server should have routes added to it to allow traffic between the 2. With a configuration of one big subnet it is impossible controll what traffic goes between the 2. You can then set up ACLs allowing which traffic you want to pass between subnets.

Mike Lee
MCSE CCNA

SOLUTION

qwaletee

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nk2003

ASKER

answer for praflik:
I don't know about it, because I don't have access to server

ASKER CERTIFIED SOLUTION

liddler

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