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openvpn, traffic in clear



Hi all,
I am trying to connect two host via openvpn (OpenVPN 1.3.2.2):
- OpenBSD 3.2-stable witk GENERIC kernel on i386  (192.168.11.188)
- Linux Trustix 2.0 2.4.19 on i386 (192.168.11.192)

on Openbsd:
-----------------
14:59:21 /etc # openvpn --local 192.168.11.188 --remote 192.168.11.192 --port 5000 --dev tun0 --ping 5 --persist-tun --persist-key --secret static.key 
0: OpenVPN 1.3.2.2 i386-unknown-openbsd3.2 built on Dec 16 2002
1: UDP link local (bound): 192.168.11.188:5000
2: UDP link remote: 192.168.11.192:5000
3: tun/tap device /dev/tun0 opened
4: Peer Connection Initiated with 192.168.11.192:5000


on Linux:
-------------
root_(_at_)_suxlinux /etc# openvpn --local 192.168.11.192 --remote 192.168.11.188 --port 5000 --dev tun0 --ping 5 --persist-tun --persist-key --secret static.key 
0: OpenVPN 1.3.2.2 i586-pc-linux-gnu built on Jan  8 2003
1: UDP link local (bound): 192.168.11.192:5000
2: UDP link remote: 192.168.11.188:5000
3: tun/tap device tun0 opened
4: Peer Connection Initiated with 192.168.11.188:5000

Now, I can ping between two hosts.. but on a third machine (rage):

root_(_at_)_rage ~# tcpdump host 192.168.11.188 and host 192.168.11.192
tcpdump: listening on eth0
16:22:19.674084 192.168.11.188 > 192.168.11.192: icmp: echo request
16:22:19.674166 192.168.11.192 > 192.168.11.188: icmp: echo reply
16:22:20.254596 192.168.11.188.5000 > 192.168.11.192.5000:  udp 60
16:22:20.684516 192.168.11.188 > 192.168.11.192: icmp: echo request
16:22:20.684603 192.168.11.192 > 192.168.11.188: icmp: echo reply
16:22:21.694774 192.168.11.188 > 192.168.11.192: icmp: echo request
16:22:21.694861 192.168.11.192 > 192.168.11.188: icmp: echo reply

the traffic is in clear....?! where are my errors? ;)
sorry for my poor english... bla bla bla...

 tia!
     goony

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