Can't resolve certain website addresses

Hello, I am using SBS2003 with WinXP clients. I cannot access certain
websites using IE on the client workstation. I cannot Ping them
successfully either. But, when I enter the direct IP address, I can
access the site perfectly. I conclude that the domain name resolution
is not being done properly for certain sites. Most other sites I can
access without problems. I can access every site from the server. I am
using two NICs on the server with the SBS builtin firewall. I did have
to re-configure this a few times with the wizards so maybe it got
messed up in there somewhere. I even had to hard-code the IP address in
the SMTP field for Outlook in order to send email. Does anyone know why
the DNS does not resolve certain names and how to fix this?
Thanks a lot,
Mark

Also make sure not spyware in your system. this link may help,

how to troubleshoot internet access issues Cannot access some secured web sites. 1. Troubleshooting IE Issues. 2. Make sure no filtering software to block some web sites. ...
http://www.howtonetworking.com/Inter...etaccessc1.htm


Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
"Mark Gruber" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
Hello, I am using SBS2003 with WinXP clients. I cannot access certain
websites using IE on the client workstation. I cannot Ping them
successfully either. But, when I enter the direct IP address, I can
access the site perfectly. I conclude that the domain name resolution
is not being done properly for certain sites. Most other sites I can
access without problems. I can access every site from the server. I am
using two NICs on the server with the SBS builtin firewall. I did have
to re-configure this a few times with the wizards so maybe it got
messed up in there somewhere. I even had to hard-code the IP address in
the SMTP field for Outlook in order to send email. Does anyone know why
the DNS does not resolve certain names and how to fix this?
Thanks a lot,
Mark

Are you running DNS on this server? If so, is this server listed as the DNS
server for the client machines on the network? If so, do you have both of
your ISP's DNS servers setup in the forwarders tab?

In your networking properties on the server, what are your DNS servers under
TCP/IP Properties?




"Mark Gruber" wrote:

> Hello, I am using SBS2003 with WinXP clients. I cannot access certain
> websites using IE on the client workstation. I cannot Ping them
> successfully either. But, when I enter the direct IP address, I can
> access the site perfectly. I conclude that the domain name resolution
> is not being done properly for certain sites. Most other sites I can
> access without problems. I can access every site from the server. I am
> using two NICs on the server with the SBS builtin firewall. I did have
> to re-configure this a few times with the wizards so maybe it got
> messed up in there somewhere. I even had to hard-code the IP address in
> the SMTP field for Outlook in order to send email. Does anyone know why
> the DNS does not resolve certain names and how to fix this?
> Thanks a lot,
> Mark
>

JayF wrote:

> Are you running DNS on this server? If so, is this server listed as
> the DNS server for the client machines on the network? If so, do you
> have both of your ISP's DNS servers setup in the forwarders tab?
>
> In your networking properties on the server, what are your DNS
> servers under TCP/IP Properties?
>
>
>
I fixed this problem. I had type one of the DNS IP numbers incorectly.
That's why I could only resolve certain addresses. Duh!
Thanks for your help.

>
> "Mark Gruber" wrote:
>
> > Hello, I am using SBS2003 with WinXP clients. I cannot access
> > certain websites using IE on the client workstation. I cannot Ping
> > them successfully either. But, when I enter the direct IP address,
> > I can access the site perfectly. I conclude that the domain name
> > resolution is not being done properly for certain sites. Most other
> > sites I can access without problems. I can access every site from
> > the server. I am using two NICs on the server with the SBS builtin
> > firewall. I did have to re-configure this a few times with the
> > wizards so maybe it got messed up in there somewhere. I even had to
> > hard-code the IP address in the SMTP field for Outlook in order to
> > send email. Does anyone know why the DNS does not resolve certain
> > names and how to fix this? Thanks a lot,
> > Mark
> >