The source IP address is normally left as the default of "Use this machines IP"
When Kiwi Syslog Daemon forwards a message to another Syslog Daemon, it adds a tag to the message text to indicate the original sending host of the message. The message can be sent through multiple relays without loosing the identity of the original message sender.
The tag 'original address=192.168.0.1' is added to the text straight after the <PRI> value. If the 'Use Syslog RFC header' option is checked, the tag is added after the Syslog header.
When you specify a different address as the source IP address, the value is inserted into the 'original address=' tag. If "Use this machines IP" is specified, no original address tag is inserted into the text.
Kiwi Syslog Daemon automatically removes the tag before logging or forwarding the messages.
Entering a specific IP address
You can type over the selected list options and use a specific IP address. The source IP address must be specified as a standard IP address NOT as a host name.
Examples:
Use this machines IP (Default)
192.168.0.1
10.0.0.25
logginghost.company.com
192.168.1.? (This will generate a random host between 192.168.1.1 and 192.168.1.254)
Use this machines IP
No additional 'original address=' tag is inserted into the message text. The message will originate from this host.
Random Class C addresses
Automatically generates a random class C IP address for each message it sends. This is useful for testing the DNS resolver on the Syslog Daemon. Each message will appear to come from a different host and will require reverse DNS resolution.
Random host on this subnet
This option takes the IP address of the current machine and generates a random value from 1 to 254 for the 'host' portion of the IP address (assumes a class C mask). For example, if your machine address is 192.168.1.100. Random addresses will be picked between 192.168.1.1 and 192.168.1.254.