[Openswan Users] packet bigger then 280 want go threw

[jorge]

Hi i have a problem with openswan 2.3 running with kernel 2.6.9. Ipsec 
starts without problems, i can also ping some hosts from second segment 
of a tunnel. The problem is that if i try to ping with packet bigger 
then 280 bytes, the packet will not go threw. What is interesting , that 
tcpdump shows me only the packets smaller then 280 bytes, bigger want show..
Maybe is something with mtu.
Has anybody some idea?
thanks
Jorge  Sanchez