6.57. (XAUP) UDP SERVER PORT
6.57
(XAUP) UDP Server Port
Qualifiers
:
S
,
Q
,
R
This command is used to configure a listening UDP port on the unit. If
the special value
00000
is used the unit won’t listen for UDP messages on a
fixed port, instead it will only use the dynamic port created when it sends
reports to a UDP destination.
When set, the unit listens for UDP messages on this port originated from
any IP-type
Destination
configured to work on UDP. This validation can
only be done when the
Destination
is defined as an IP number, i.e. a host
name can not be validated when trying to communicate trough the unit’s
UDP server port.
Another type of IP-address validation can be done by configuring on the
unit an UDP-Network which is allowed to interact with the UDP-Server
port. This is achieved with the
XAUN
message. When an UDP network is
set, the unit uses it first to validate an incoming query on the UDP-Server
port, if the peer’s IP address matches the UDP-Network, a response is sent
too the peer
6
. If it does not match with the UDP-Network, it tries to find
a match on any of the IP-type, UDP-defined
Destinations
, if a match is
found, a response is generated to the IP/UDP-Port defined on the matching
Destination
7
. Finally, if no match is found, the query is silently discarded.
Regardless of this parameter being set or not, the unit always listens on
the dynamic UDP port generated when a report is transmitted to a UDP
destination.
The message has the following format:
AAAAA
Chars
Item
Format
Value
Meaning
5
Server Port
AAAAA
0-65535
Server Port: ’A’ sets the listening UDP port for
the unit. Using
00000
makes the unit not to
listen on a fixed listening port, it will continue
listening on the dynamic UDP port created when
UDP reports are transmitted.
6
The response is sent by interchanging Source Port with Destination Port
7
Source and Destination ports are not interchanged: An UDP datagram is gen-
erated having Source Port randomly-set and Destination Port set to the value
configured with the
XADP
message corresponding to the matching
Destination
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