[Openswan Users] Encapsule SIP message

[ALAEDDINE abbech]

hi all
i want secure the SIP message but when i do a tcpdump i see the signalisation clear.

my ipsec.conf :
version 2.0 # conforms to second version of ipsec.conf specification

# basic configuration
config setup
# Debug-logging controls: "none" for (almost) none, "all" for lots.
# klipsdebug=none
# plutodebug="control parsing"
        interfaces="ipsec0=eth0"
        nat_traversal=no
        oe=off
        protostack=netkey
conn astaa
        left=IP_PROXY_SIP_1
        leftsubnet=IP_PROXY_SIP_1/32
        right=IP_PROXY_SIP_2
        rightsubnet=IP_PROXY_SIP_2/32
        esp=3des-md5-96
        auto=start
        authby=secret
        type=transport
        forceencaps=yes

What is my fault?
how parametre i must add it??

thanks




      
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