Sonicwall TZ170 drops connection on LAN side

Hi

The problem i am having is, i have 15 users connect to a SBS 2003
server.

My config is

SBS 2003 with 1 Nic

IP         192.168.0.50
SubNet  255.255.255.0
Gateway 192.168.0.1

DNS 192.168.0.50

Sonicwal IP LAN Side 192.168.0.1
WAN Port connects to ADSL

The is problem is that one 1 clients drops connection to the
gateway/sonicwall.

All clients are dhcp and on the same ip range

When i ping 192.168.0.1 i get no reply, but if i ping SBS server
192.168.0.50 i get a reply.
I went to another client and tried to ping 192.168.0.1 I get a reply.

If i unplug the client with the problem nic cable and put it back in
again i get a reply from 192168.0.1, but after a while it drops again.
No other user is having any problems.

All the client computers are WIN XP.

I have changed the nic in the client and the cat5 patch lead, but this
had made no difference.

This is an intermitting problem, it works then does not work and then
it works again.

Any help, advice would be great

Cheers

Niall

if it's just one host on the LAN not receiving replies, I doubt it's a sonicwall problem, anyway: check the logs and arp 
entries on the sonicwall.
make sure your client *is* getting a valid dhcp adress, and that there aren't any duplicates,


also: do you have some firewall, anti-something on that particular client?

M

Thank M for you reply

I have checked the client and it does have a valid ip address, cause
when it cannot ping the sonicwall, it can ping the the
sbs 2003 server.  other clients can ping both, when this client cannot
only ping the sonicwall.

I have not tried to ping from the sonicwall to the the failed client to
see if this is working.

When i renew the dhcp sometimes that fixes it, but only for a short
while, if i unplug the nic cable and reconnect it again
that fixes it for a short while.

what should i be looking for in the arp table on the sonicwall

Cheers

N

Niall: Here are some things I would check
a. does the client have any static network configuration settings?
b. try the problem client on different switch port on your firewall/
switch?

I had a similar issue with a friend of mine two days,who was trying to 
connect his laptop to his high speed cable connection...client would 
obtain a valid ip address fine from the approved network range but 
could not go anywhere on the internet...checked every possible setting/
configuraiton on his ie but did not find anything...finally it clicked 
on me to check his network card setting and there was the problem, 
apparently his son had used the laptop at college and had set a static 
dns entry.....after 2+ hours (of free work)....

so, give it try...
Julio
(somerset, pa)

Cheers J

I will give that a try, that was the next thing i was going to do, 
change port on switch.

I am also going to give the client a static ip address,


Niall

check if the sonicwall has an arp entry for the client mac, meaning they can "see"
each other on layer 2

M

Cheers Mak

I will check that out and let you know

N