Security policies enforce a set of rules for transit traffic, identifying which traffic can pass through the firewall and the actions taken on the traffic as it passes through the firewall. The technical documentation at https://www.juniper.net/techpubs/en_US/junos12.1x44/information-products/pathway-pages/security/security- basic -policy.html addresses the following topics on security policies:
The example provided is based on a connection between ssg20 and ssg350m according to the diagram below. It s a basic example using the configuration defaults whenever possible. X.21 interfaces are used.
From an DHCP Relay Agent as an unicast on UDP port 67. The ScreenOS firewall works correctly in scenario 1; but will not work in scenario 2. The following message is reported in the output of debug flow basic ipid = 8475(211b), @2d57f910
For testing purpose, continuous ping to global DNS server 220.127.116.11 is initiated but all the pings are unsuccessful. During troubleshooting, the command debug flow basic gives an insight into the packet flow and the reason for ping failure.