The IPsec logs show output from the IPsec daemon. Normal output,
successful connections, as well as errors are all displayed here. On
pfSense® software version 2.1.x and before, this output is from the
racoon daemon. On pfSense software version 2.2 and later this
task is handled by strongswan
Where possible, if a log message contains an IP address of a configured
IPsec tunnel, that tunnel’s description is prepended to the log entry.