Secure Computing ADMINGUIDEREVA Instrukcja Obsługi Strona 54
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80-001113 SysLINK Administrator’s Guide Page 52
Lightweight Heartbeat Settings
The Lightweight Heartbeat (LWHB) feature is designed to provide a low overhead method
for units to check in more frequently than existing SOUP methods. This is particularly useful
when used with cellular data plans that provide only a few MB of data per month. Full
SOUP updates can be scheduled at most every day and have relatively high overhead (20-
30Kbytes per update). SOUP heartbeats can be scheduled more often but still relatively high
overhead (5-6K per heartbeat). The LWHB allows units to:
Check in frequently - providing an "I'm up" indicator
Check to see if there are further actions that should take place - like a full SOUP
update
The LWHB server can record the source IP address which, in the cellular world can change
multiple times a day
LWHB does not use SSL. It connects to a server using either UDP or TCP (configurable) on a
configurable port number. The local IP port can also be configured if necessary to receive
replies from the server through a firewall.
Using UDB, each LWHB takes about 60 bytes. Using TCP, each LWHB takes about 650 bytes.
You must also take into account periodic DNS lookups for the hostname.
- Table of Contents 3
- Chapter 1: Introduction 5
- Chapter 2: Configuration 7
- How to Use the Ports 8
- Serial Settings 12
- Port Services 14
- Service Types 16
- No Outgoing Service 16
- Modem Service 16
- Outgoing Network Connection 18
- Outgoing Telnet Connection 18
- Network Connection Options 18
- Telnet Options 19
- Remote Port Access 20
- Phone Number Translation 21
- Network Translation 23
- Protocol Settings 24
- Raw or Secure TCP 25
- Converted Protocols 28
- SSL Options 30
- Type of Peer 30
- Peer Identity Verification 30
- List of Allowable Ciphers 31
- Network Settings 33
- Default Gateway 34
- Ethernet MTU 34
- TCP Keep-Alive 35
- HTTP Server Configuration 35
- Remote Management 36
- DNS Settings 37
- IP Routing 39
- PPP Settings 41
- Time Settings 43
- Security Settings 45
- Security Log 47
- SSL Security Certificates 48
- Online Update 50
- Cellular Settings 56
- DHCP Server Management 57
- Updating 59
- Troubleshooting 60
- Serious System Error Codes 62
- Port Status 63
- OS and Network Information 65
- Temperature Monitor Settings 65
- Motion Detection Settings 66
- Log/Debug Settings 67
- Reset/Reboot 70
- Flash Management 71
- Flash Update 72
- Download Flash Information 72
- Restore Factory Defaults 73
- PDA Compaction 73
- Other Debugging 74
- Chapter 4: Modem Emulation 75
- Outgoing and Incoming Calls 76
- AT Commands 76
- Supported Commands 77
- S-Registers 79
- Response Codes 79
- Modem Signal Behavior 80
- Phone Numbers 81
- Port Settings 81
- Information 82
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