Exchange server/ DNS

[Sri]

I have a customer having multiple remote locations. Some
vendor setup their entire system and now I have to
troubleshoot a problem.

Two of the remote locations are unable to connect to their
exchange server located at the main site. The network is
connected using VPN (Cisco) and I can ping the exchange
server from the remote location using IP but not by server
name. At the remote location Outlook 2000 client if I try
putting IP address of the exchange server instead of the
name, still it wouldn't connect. However, I can connect
and use Outlook 2000 at the main site.

They have only one Exchange server at the main location
and it is 5.5 running on W2K server.

At the remote location W2K server, I see some DNS errors,
some of them are Event ID: 5772. I tried searching the KB,
without any luck.

All this problem started to happen after they cleaned
Blaster viruses from their exchange server.

Is this a MS DNS problem or Exchange problem? If so, where
should the DNS at the remote site point to?

Any pointers, help on this issue is appreciated.

Thank you for your time.

-Sri

 

[art]

-----Original Message-----
I have a customer having multiple remote locations. Some
vendor setup their entire system and now I have to
troubleshoot a problem.

Two of the remote locations are unable to connect to their
exchange server located at the main site. The network is
connected using VPN (Cisco) and I can ping the exchange
server from the remote location using IP but not by server
name. At the remote location Outlook 2000 client if I try
putting IP address of the exchange server instead of the
name, still it wouldn't connect. However, I can connect
and use Outlook 2000 at the main site.

They have only one Exchange server at the main location
and it is 5.5 running on W2K server.

At the remote location W2K server, I see some DNS errors,
some of them are Event ID: 5772. I tried searching the KB,
without any luck.

All this problem started to happen after they cleaned
Blaster viruses from their exchange server.

Is this a MS DNS problem or Exchange problem? If so, where
should the DNS at the remote site point to?

Any pointers, help on this issue is appreciated.

Thank you for your time.

-Sri
.
Is there a firewall in between the sites?

 

[Sri]

No firewall, however there is one router on each site for
VPN.

 

[Ace Fekay [MVP]]

In

I have a customer having multiple remote locations. Some
vendor setup their entire system and now I have to
troubleshoot a problem.

Two of the remote locations are unable to connect to their
exchange server located at the main site. The network is
connected using VPN (Cisco) and I can ping the exchange
server from the remote location using IP but not by server
name. At the remote location Outlook 2000 client if I try
putting IP address of the exchange server instead of the
name, still it wouldn't connect. However, I can connect
and use Outlook 2000 at the main site.

They have only one Exchange server at the main location
and it is 5.5 running on W2K server.

At the remote location W2K server, I see some DNS errors,
some of them are Event ID: 5772. I tried searching the KB,
without any luck.

All this problem started to happen after they cleaned
Blaster viruses from their exchange server.

Is this a MS DNS problem or Exchange problem? If so, where
should the DNS at the remote site point to?

Any pointers, help on this issue is appreciated.

Thank you for your time.

-Sri

I'm assuming you can't puing by the server's NetBIOS name. Since it's
NetBIOS resolution I'm assuming we're talking about here, (which is what
Ex55 needs), is there a means of resolving NetBIOS, such as WINS, If so, are
the clients configured to use the WINS server?

As for 5772 errors:
http://www.eventid.net/display.asp?eventid=5772&source=

It states there's a global group called "Servers" created which was used for
Lan Manager BDCs (from the legacy days).. This is not allowed in NT, and I'm
assuming not allowed in W2k. If this doesn't apply, sorry, can't find more
info on it, unless someone else has a suggestion.

--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.

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

 

[Sri]

Thanks for the tip Ace, will try and look for any WINS
servers in the network. Else, see if any of those routers
are blocking NetBios traffic.

-Sri

 

[Ace Fekay [MVP]]

In

Thanks for the tip Ace, will try and look for any WINS
servers in the network. Else, see if any of those routers
are blocking NetBios traffic.

-Sri

Sri,

Routers by DEFAULT are designed to block NetBIOS traffic. It's their job to
do that. Many routers won't allow you to enable it anyway. If this is the
case, you'll need to use a NetBIOS name resolution method, such as WINS.


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.

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

 

[Ace Fekay [MVP]]

In

Ace,

thank you for prompt replies. Now, on the remote site they
have only one W2K server. My understanding was W2K servers
do not have WINS, they use DNS. How do I propogate name
resolution to the remote site? Active Directory Integrated
DNS?

-Sri

Sri, as I mentioned previously, you will need WINS for NetBIOS name
resolution in an enterprise environment, such as what you have (multiple
subnets with routers - router do not pass NetBIOS). Keep in mind, DNS has
nothing to do with NetBIOS. Even if it was a direct host SMB, that still
doesn't give you what you're looking for.

Need WINS. Are you familiar with how to set it up? Pretty much just install
it, point all machines to it in IP Propertes, (including the WINS server to
itself, and all other servers and workstations to it), and it just works.
There are some parameters to adjust but in most cases, it;'s just plug and
play.



--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.

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