LAN & Internet Conflict ???

[Guest]

I just bought an IBM ThinkCentreS50 desktop PC with
Windows XP Professional. When it is connected to our LAN
(complete w/ IP address, GW and DNS, domain name) it
cannot connect to the Internet. Everytime I browsed a
page, I notice an IP address shown at the bottomleft of
IE instead of the usual website location/name. I'm sure
connection is okay cuz I can ping websites so its only
the IE that doesn't work.

But when I connected this PC to our aDSL and set the IP
address, GW & DNS to auto DHCP, it can connect to the
Net. The strange thing is, our other PCs are setup just
the way I initially setup this Win XP Pro PC so I don't
know if XP Pro is somehow blocking the connection to the
net.

Please help!

Thanks.

..

 

[adrian916]

there are several things that could cause this.
1. are you on a domain? - if so, group policy settings
could prevent access - contact your administrator if this
is the case.
2. Do you use a vpn? if so, does this behaviour only
occur when the vpn is connected? There is a setting in
your vpn properties/networking/tcp-ip
properties/advanced, to "use default gteway on remote
network".If the remote network isn't set up for routing
this tick should be removed
3. you can ping out onto the internet by IP address. Can
you ping by name? If not, it is a DNS problem - check
your dns settings with "ipconfig /all" at the command
prompt. Verify that any address of dns servers is correct
and valid.
4 you say that when connected to adsl you used dhcp -
does this mean that you don't on the LAN? If it is a
manual/static configuration, check that all the entries
are correct and valid . If using dhcp, can you ping the
gateway?. can you release and renew the address?

It might be useful if you could provide a readout of the
ipconfig /all results, so we could see if there is
anything obvious / unusual

HTH - let us know.

 

[Guest]

Thank you for your reply. Please find my answers to your
queries after each item:

-----Original Message-----
there are several things that could cause this.
1. are you on a domain? - if so, group policy settings
could prevent access - contact your administrator if

this is the case.

ANS: Yes, we are on a domain. Unfortunately I am the
Administrator and I have not made any custom group policy
settings. My settings in this problematic PC are the
same with the rest of our PCs.

2. Do you use a vpn? if so, does this behaviour only
occur when the vpn is connected? There is a setting in
your vpn properties/networking/tcp-ip
properties/advanced, to "use default gteway on remote
network".If the remote network isn't set up for routing
this tick should be removed

ANS: We're not on VPN and no VPN icon exists in the
network connection properties.

3. you can ping out onto the internet by IP address. Can
you ping by name? If not, it is a DNS problem - check
your dns settings with "ipconfig /all" at the command
prompt. Verify that any address of dns servers is correct
and valid.

ANS: Yes, I can ping IP address and fqdn such as
www.yahoo.com

4 you say that when connected to adsl you used dhcp -
does this mean that you don't on the LAN? If it is a
manual/static configuration, check that all the entries
are correct and valid . If using dhcp, can you ping the
gateway?. can you release and renew the address?

ANS: When in LAN, we use manual and provides the IP
address, DNS and Gateway. I believe they are all valid
and have tried releasing and putting them back but same
problem. Here's the result of the ipconfig /all:

C:\>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : NewPC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Realtek
RTL8139/810x Family Fast Eternet NIC
Physical Address. . . . . . . . . : 00-08-0D-1A-20-C5
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 205.220.43.110
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 205.220.43.125
DNS Servers . . . . . . . . . . . : 210.145.255.136

 

[adrian 916]

Hmm, a strange one!

Do you have any DHCP available on the network - as this
worked on your adsl, it might be worth a try on the LAN

Have you run a full up to date spyware/virus check? (I
doubt it would be this if there isn't a problem on the
adsl, but it's worth a try)

Can you view any websites by using the ip address in the
address bar of I.E instead of FQDN?

Is there anything on the router/server that could be
blocking it? (a corruption to group policy that you
haven't intentionally set, filters, security settings in
I.E or on server etc) - something that affects that
specific machine/address. (I suppose you could try
temporarily configuring that machine with an address etc
that is known to work on another machine and vice versa
to see if the problem shifts to another machine.)

I suppose the last option is to try a repair install of
XP in case something is corrupted, but again, strange
that it should work on adsl.

I don't really know what else to suggest - if I think of
anything else, I'll post back.