On Tue, 15 Nov 2005 22:32:03 -0600, "Peter" <pczurak@online.nospam> wrote:
>
>"Chuck" <none@example.net> wrote in message
>news:q50jn1psd32sc8337l1sercau21dol15dj@4ax.com.. .
>> On Mon, 14 Nov 2005 23:51:40 -0600, "Peter" <pczurak@online.nospam> wrote:
>>
>>>"Chuck" <none@example.net> wrote in message
>>>news:i6pin1p453hedveue1lfdhv15t9b9pfkpf@4ax.com ...
>>>> On Mon, 14 Nov 2005 22:04:39 -0600, "Peter" <pczurak@online.nospam>
>>>> wrote:
>>>>
>>>>>We have installed SonicWall Firewall and when I connect through VPN I
>>>>>can
>>>>>not connect to the Exchange server through Outlook
>>>>>
>>>>>When I try to create a profile
>>>>>On "check names" prompt in Services, server and mailbox are found
>>>>>sometimes
>>>>>but not allways. When not found it says "The name could not be
>>>>>resolved."
>>>>>When the mailbox and server are found, it never really connects to the
>>>>>mailbox...getting a message like 'folder not available'.
>>>>>
>>>>>I also can not ping any computer including the Exchange server by name,
>>>>>but I can ping any computer including the Exchange server by IP address
>>>>>(This is only through VPN)
>>>>>
>>>>>The Exchange runs on Windows 2003 SBS.
>>>>>
>>>>>What can I check to fix this problem?
>>>>
>>>> Peter,
>>>>
>>>> Make sure there's no firewall packaged with the VPN client.
>>>> <http://nitecruzr.blogspot.com/2005/10/irregularities-in-workgroup-visibility.html>
>>>> http://nitecruzr.blogspot.com/2005/1...isibility.html
>>>>
>>>> What's your DNS server? Does it have an entry for the Exchange server?
>>>> <http://nitecruzr.blogspot.com/2005/05/windows-xp-on-nt-domain.html>
>>>> http://nitecruzr.blogspot.com/2005/0...nt-domain.html
>>
>>>I don's see any settings for the Firewall in the VPN client
>>>
>>>DNS server is the same physical server as the Exchange , Windows 2003 SBS
>>
>> Peter,
>>
>> Speaking from gut feel, about 50% of the problems here, that are resolved
>> simply, turn out to be firewall related. Maybe 25% are LSP / Winsock /
>> TCP/IP
>> corruption. The other 25% are miscellaneous.
>>
>> With your symptoms, combined with the VPN involvement, a firewall becomes
>> more
>> than 50% likely. "Cannot ping by name but can ping by IP address"
>> suggests a
>> DNS server issue. DNS server issues can, again, be caused by firewall
>> problems.
>>
>> Most common network problems:
>> <http://nitecruzr.blogspot.com/2005/10/irregularities-in-workgroup-visibility.html>
>> http://nitecruzr.blogspot.com/2005/1...isibility.html
>>
>> Firewall issues:
>> <http://nitecruzr.blogspot.com/2005/05/your-personal-firewall-can-either-help.html>
>> http://nitecruzr.blogspot.com/2005/0...ther-help.html
>>
>> Of the problems here that are NOT resolved simply (as above), you have to
>> do
>> some work. I can advise you, but you gotta do the leg work.
>>
>> Network problem solving - general advice:
>> <http://nitecruzr.blogspot.com/2005/08/solving-network-problems-tutorial.html>
>> http://nitecruzr.blogspot.com/2005/0...-tutorial.html
>>
>> Network problem solving - Network Neighborhood issues:
>> <http://nitecruzr.blogspot.com/2005/05/troubleshooting-network-neighborhood.html>
>> http://nitecruzr.blogspot.com/2005/0...ghborhood.html
>>
>> When you say "I cannot ping", you mean your computer, right? I presume
>> there
>> are some computers that DON'T have any such problem (you have an SBS
>> server
>> which hopefully is working?)? OK, zero in on the problem thru analysis.
>> Identify 1 or 2 computer with problems, and 2 or 3 without problems.
>> Examine
>> "browstat status" and "ipconfig /all" from each computer identified. Read
>> this
>> article, and linked articles, and follow instructions precisely:
>> <http://nitecruzr.blogspot.com/2005/05/troubleshooting-network-neighborhood.html#AskingForHelp>
>>
>> And bottom post. For your own sake, as well as mine. Help me to help
>> you.
>> <http://nitecruzr.blogspot.com/2005/05/how-to-post-on-usenet-and-encourage.html#TopPosting>
>> http://nitecruzr.blogspot.com/2005/0...tml#TopPosting
>>
>> --
>> Cheers,
>> Chuck, MS-MVP [Windows - Networking]
>> http://nitecruzr.blogspot.com/
>> Paranoia is not a problem, when it's a normal response from experience.
>> My email is AT DOT
>> actual address pchuck mvps org.
>
>Thank you for your help.
>
>I can not ping any computer on company's network from my home computer
>through VPN by computer name, but I can ping the same computer by the IP
>address.
>
>Also the default website on Windows 2003 http:\\companyweb does not work
>anymore either, I am getting 'Page Can Not be Displayed".
>
>FYI:
>Before we installed the SonicWall the Company's network was 192.168.1.1 and
>we changed it to 192.168.10.1.
>(the network consists of 8 computers plus the server)
>
>So I think it is the DNS issue, but I do not know where to look or how to
>fix it.
Peter,
Well, it almost certainly is a DNS issue. Now you have to find out what the
problem is that causes the DNS issue.
Google for your symptoms, I think you'll find at least half of your cases
involve firewalls blocking the DNS packets. Of the other half, you'll find home
systems still using local or ISP DNS, even when connected to a VPN with a
corporate DNS at the other end. And you'll find LSP / Winsock / TCP/IP
corruption.
You could try putting the IP address of the Exchange server in the Hosts or
LMHosts file on your home system. If your problem is simple DNS packets being
lost / blocked, that will get around the problem. Or make sure that your DNS
server is one at the other end of the VPN tunnel, and knows the address of the
Exchange server. Or diagnose the problem. I've given you plenty of references
above.
But if I keep asking questions, and you ignore the questions, we'll never get
any answers.
--
Cheers,
Chuck, MS-MVP [Windows - Networking]
http://nitecruzr.blogspot.com/
Paranoia is not a problem, when it's a normal response from experience.
My email is AT DOT
actual address pchuck mvps org.