dynamic VPN

i want to test client to SRX vpn, i follow the configue guide, but i can't find some command on my SRX.

such as edit security dynamic-vpn

I want to know if dynamic VPN need license?

root@J0# edit security ?
Possible completions:
<[Enter]> Execute this command
> address-book Security address book
> alarms Configure security alarms
> alg Configure ALG security options
> analysis Configure security analysis
> application-firewall Configure application-firewall rule-sets
> application-tracking Application tracking configuration
> certificates X.509 certificate configuration
> dynamic-address Configure security dynamic address
> firewall-authentication Firewall authentication parameters
> flow FLOW configuration
> forwarding-options Security-forwarding-options configuration
> idp Configure IDP
> ike IKE configuration
> ipsec IPSec configuration
> log Configure security log
> nat Configure Network Address Translation
> pki PKI service configuration
> policies Configure Network Security Policies
> resource-manager Configure resource manager security options
> screen Configure screen feature
> softwires Configure softwire feature
> ssh-known-hosts SSH known host list
> traceoptions Network security daemon tracing options
> utm Content security service configuration
> zones Zone configuration
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