XCON: MTA Outbound Connection Refused by X.400 Host

MORE INFORMATION

A trace of the faulting connection might yield a packet similar to the following. The line of interest in this particular situation is ISO: Reserved = 0 (0x0). The following sample shows the Reserved field with the new behavior, specifically the Reserved field will always be explicitly set to 0x0. If this field shows this to be any other value, this may be the cause of the connection failure and is corrected in SP3.

<SOURCE MACHINE> <DESTINATION MACHINE> TPDU Type: Connection Request, Len:
14 199.199.199.199 200.200.200.200 IP

FRAME: Base frame properties
ETHERNET: ETYPE = 0x0800 : Protocol = IP:  DOD Internet Protocol
IP: ID = 0xC6B5; Proto = TCP; Len: 58
TCP: .AP..., len:   18, seq:  93150219-93150236, ack: 508652377, win: 8760,
src: 2185  dst:  102
ISO: RFC 1006 ISO Packet, ver: 3, Len: 4
    ISO: Version = 3 (0x3)
    ISO: Reserved = 0 (0x0)<===== RIGHT HERE
    ISO: Length = 18 (0x12)
    ISO: Data: Number of data bytes remaining = 14 (0x000E)
TPDU: Type: Connection Request, Len: 14