**HELP** Cannot connect to Exch Serv. in Site to Site vpn based on ISA2K



I have a Site-to-Site VPN based with ISA 2K between two offices.
Main office have One Server "Main01" (Win2K SP4, DC, ISA2K SP2, RRAS)
and behind the ISA2K are multiple network clients with xp and another
server "S_Exch01" (Win 2K3 SP1, DC, Exch 2K static ip, nat client) .
The branch office have One Server "Branch01" (Win2K SP4, DC, ISA2K
SP2, RRAS) and multiple network clients with xp.

There is only one domain with two sites, main office have 10.0.0.0/24
subnet and branch office have 192.168.1.0/24 subnet. Main office have
512/128 kb and Branch office 256/128 kb

I can successfully connect Main01 to Branch01 in a site to site vpn;
from Branch01 I can ping or connect by "\\computername" to any xp
client or the Exchange server in the main office. Even I can connect
with an Outlook client from Branch01 to the Exchange server .........
(now you r guessing where is my problem).

From an xp client in the branch office i can ping (IP or name) to any
PC in the main office (Main01, S_Exch01 or any xp client) ; From the
same XP I can connect by "\\computername" to Main01 or another xp
client in the main office, but i cannot connect to the Exchange Server
by "\\S_Exch01" or "\\serverIP" and displays me a remote procedure
call error. I cannot connect either by outlook client (I successfully
telnet port 25).

When making a "client to server" vpn conection from the xp clients in
the branch office , I can successfully connect by "\\S_Exch01" or by
Outlook client.

I think the problem is in the Branch01 ISA2K server , but i dont know
where to start.

PLEASE HELPPPP!!!!!

.



Relevant Pages

  • Re: POP3 and Firewalls
    ... The user does not want to VPN. ... >> remote user who wants from home to download his email to a mail client ... >> our exchange server. ...
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