You want to use ESP for your VPN Tunneling transport mechanism.
Which port must be open on your firewall to the Junos Pulse Secure Access Service in a default
configuration?
A.
UDP 500
B.
TCP 500
C.
UDP 4500
D.
TCP 4500
Explanation:
http://forums.juniper.net/t5/SSL-VPN/Connection-delay-issue-with-JUNOS-Pulse-3-0R1-1/td-p/142534 (search for UDP 4500)