Reference Manual

NAME

setbmm - set best-match mapping for incoming UDP traffic

SYNOPSIS

setbmm [on|off]
DESCRIPTION

The setbmm command turns Best Match Mapping for incoming UDP traffic on or off. When invoked with no argument, the current setting of the Best Match Mapping flag is printed.

NOTES
Some UDP servers respond to client requests with packets from constantly changing source port numbers. NAT32 will normally reject such packets because the incoming source port number does not match the destination port number of the original request from the client.

When the Best Match Mapping flag is set, NAT32 relaxes the check done on such packets and thus forwards packets from any server source port to the client, as long as the IP addresses match and the destination port matches the client's original mapped source port.

SEE ALSO
umap