IE errors caused by DNS?

[Guest]

I'm getting a large number of 'This page cannot be displayed' error messages from IE (6 sp1)
when using the Internet. At this point, almost every page displays this error.
Doing a refresh will sometimes display the page.

Because the error message says "DNS error" at the bottom, I'm wondering if there's something
amiss in my settings, although the event logs on both (win2k sp4) DCs are clean.

Specifics:
Clients (like the machine giving the error message) are configured as follows:
Static IP, DG = router IP, Preferred DNS = DC1 IP, Alternate DNS = DC2 IP.
DC1: DG = router IP, Preferred DNS = DC2 IP, Alternate DNS = blank. Forwarder is On, set to 4.2.2.2.
DC2: DG = router IP, Preferred DNS = DC1 IP, Alternate DNS = blank. Forwarder is On, set to 4.2.2.2.

Anyone have any idea what's causing this?

Thanks!

dj

 

[Kevin D. Goodknecht [MVP]]

In

I'm getting a large number of 'This page cannot be displayed' error
messages from IE (6 sp1)
when using the Internet. At this point, almost every page displays
this error.
Doing a refresh will sometimes display the page.

Because the error message says "DNS error" at the bottom, I'm
wondering if there's something
amiss in my settings, although the event logs on both (win2k sp4) DCs
are clean.

Specifics:
Clients (like the machine giving the error message) are configured as
follows:
Static IP, DG = router IP, Preferred DNS = DC1 IP, Alternate DNS =
DC2 IP.
DC1: DG = router IP, Preferred DNS = DC2 IP, Alternate DNS = blank.
Forwarder is On, set to 4.2.2.2.
DC2: DG = router IP, Preferred DNS = DC1 IP, Alternate DNS = blank.
Forwarder is On, set to 4.2.2.2.

Anyone have any idea what's causing this?

Thanks!

dj

Any services disabled such as DHCP client service?

 

[Ace Fekay [MVP]]

Is there a firewall or NAT and possibly the MTU settings have been altered?


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

 

[Ace Fekay [MVP]]

I haven't tampered with the MTU setting.
I am using ZoneAlarm, but not getting any warnings, etc.
Would a firewall mis-configuration allow any sites thru?

Try disabling ZA.

Yes, a firewall misconfig can cause that.

Same with NAT.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

 

[Kevin D. Goodknecht [MVP]]

In

Thanks for the quick response.
I'm not using DHCP - all the machines have static IPs.
I'll check though - disabled on the client or the DC or both?

I understand, many people think that since their aren't using DHCP, that the
DHCP client service can be disabled. If the DHCP client service is disabled
you won't have DNS resolution.
The DHCP client service cannot be disabled on any machine.

 

[Guest]

I checked all the machines and the DHCP service is running (set to Automatic)
I'm reluctant to disable the firewall. Is there another way to test the firewall theor
without disabling it?

 

[Ace Fekay [MVP]]

In

I checked all the machines and the DHCP service is running (set to
Automatic).
I'm reluctant to disable the firewall. Is there another way to test
the firewall theory without disabling it?

Disable ZA. Don't know of any other way to test if it's the firewall or not
without disabling it.

Akin to asking, well, if I don't put salt in the recipe, will it taste any
different? But I'm reluctanct to eliminate the salt. You'll just have to
eliminate the salt to find out.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.
This posting is provided "AS IS" with no warranties.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory