The current flag names are:

tunnel

tunnelling code

tunnel-xmit

tunnelling transmit only code

pfkey

userspace communication code

xform

transform selection and manipulation code

eroute

eroute table manipulation code

spi

SA table manipulation code

radij

radij tree manipulation code

esp

encryptions transforms code

ah

authentication transforms code rcv receive code

ipcomp

ip compression transforms code

verbose

give even more information, BEWARE: a)this will print authentication and encryption keys in the logs b)this will probably trample the 4k kernel printk buffer giving inaccurate output

All Klips debug output appears as kernel.info messages to syslogd(8). Most systems are set up to log these messages to /var/log/messages. Beware that klipsdebug --all produces a lot of output and the log file will grow quickly.

The file format for /proc/net/ipsec_klipsdebug is discussed in ipsec_klipsdebug(5).