hello,
 
i am very interesting to use ipsec-tools implement it.
 
"ipsec with ipcomp" configure
spdadd 1.1.1.1  2.2.2.2 any -P out ipsec ipcomp/transport//use esp/transport//require ah/transport//require;
spdadd 2.2.2.2  1.1.1.1 any -P in ipsec ipcomp/transport//use esp/transport//require ah/transport//require;
 
when i enable ipcomp, transmission speed increase.
so i try
 
spdadd 1.1.1.1  2.2.2.2 any -P out ipsec ipcomp/transport//use;f
spdadd 2.2.2.2  1.1.1.1 any -P in ipsec ipcomp/transport//use;
 
setkey -f /etc/racoon/ipsec.conf
 
IPcomp does't work.
 
i read the list archive below
http://sourceforge.net/mailarchive/forum.php?thread_name=87vdi6mnr0.fsf%40isengard.friendlyfire.se&forum_name=ipsec-tools-users
i don't find any method about "ipcomp without ipsec" form list
 
please give me any help.
thanks a lot.