SilentKnight VisorALARM High Availability Receivers - Manual (Page 6)

5
Pair of units involved Direction Type
Dst. Port
(default)
2
Connection
starts at
IPDACT-2/2UD /
VisorALARM
Two-way UDP 80 IPDACT-
2/2UD
Chart 1. IPDACT-2/2UD – VisorALARM traffic pattern
The default Destination Port value can be modified in the IPDACT-2/2UD and
VisorALARM configuration.
2.2 VisorALARM clock synchronization
Both the main and the backup VisorALARM synchronize their internal clocks with an
external IP server in compliance with the Network Time Protocol Standard, type UDP.
Pair of units involved Direction Type
Dst. Port
(default)
Connection
starts at
VisorALARM / NTP
Server
Two-way UDP 123 VisorALARM
Chart 2. VisorALARM – NTP Svr clock synchronization
2.3 VisorALARM query for Data Base update
Pair of units involved Direction Type
Dst. Port
(default)
Connection
starts at
Main VisorALARM /
Backup VisorALARM
Two-way UDP 80 Backup
VisorALARM
Chart 3. VisorALARM queries for the DDBB update
2.3 VisorALARM Data Base synchronization
Pair of units involved Direction Type
Dst. Port
(default)
Connection
starts at
Main VisorALARM /
Backup VisorALARM
Two-way TCP 35001 Backup
VisorALARM
Chart 3. VisorALARM DDBB synchronization
2 The Dst. Port value shown in the Chart corresponds to the Destination Port. Although the IPDACT-
2/2UD fixes the Source Port the same value, this one is usually changed to a random value in the IPDACT-
2/2UD Internet access router (NAPT translation).