XCON: Site Connector Not Usable Through a Firewall (191594)
The information in this article applies to:
- Microsoft Exchange Server 5.5
This article was previously published under Q191594 SYMPTOMS
According to the Microsoft Knowledge Base article 161931, "XCON:
Configuring MTA TCP/IP Port # for X.400 and RPC Listens," two Exchange
Server computers in different sites can be configured to communicate
through a firewall by setting the desired port numbers for RPC Listens.
However, if the firewall filters incoming and outgoing ports, no mail is
flowing and the event log shows the following 9322 error:
An interface error has occurred. An MtaBindBack over RPC has failed.
Locality Table (LTAB) index: %1, NT/MTA error code: %2. Comms error %3,
Bind error %4, Remote Server Name %5, Protocol String %6 [%7 %8 %9 %10]
(14)
CAUSE
The calling Exchange Server MTA issues a RPC bind command that contains a
TCP port number to be used in the reply, the bindback RPC command. When
replying, the called MTA does not use this port number, and as the firewall
is configured to let go through only this port number, the reply is never
received by the calling MTA. The communication is not established and as a
result no mail can be sent or received.
RESOLUTION
To resolve this problem, obtain the latest service pack for Exchange Server
version 5.5. For more information, please see the following article in the
Microsoft Knowledge Base:
191014
: XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack
STATUS
Microsoft has confirmed this to be a problem in Microsoft Exchange Server
version 5.5.
| Modification Type: | Minor | Last Reviewed: | 4/28/2005 |
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| Keywords: | kbbug kbfix kbQFE KB191594 |
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