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Create a license:
http://www.juniper.net/us/en/dm/free-vsrx-trial/
Date: 22/03/2017
website: https://download.juniper.net/cust-svc/srx/E419777401.txt
E419777401 aeaqic apaeor 4altdy arwhqb impacr i6bmed
embrgu ydgmbz bqihmu 2slawu u5lonf ygk4sf
ozqwyb ziukrz o4t4tq 73ypay 2pgysd icl7im
u5x4l3 4pgvmf cggson fslbu7 atr27n sh6zqe
s2rq
root@vSRX1> show system license
License usage: none
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