Selective stateless packet-based services allow you to use both flow-based and packet-based forwarding simultaneously on a system. You can selectively direct traffic that requires packet-based, stateless forwarding to avoid stateful flow-based forwarding by using stateless firewall filters (ACLs). The traffic not so directed follows the default flow-based forwarding path. Bypassing flow-based forwarding can be useful for traffic for which you explicitly want to avoid flow session-scaling constraints.
For information about which devices support the features documented in this chapter, see the JUNOS Software Feature Support Reference for SRX Series and J Series Devices.
This chapter contains the following topics. For more information about configuring the stateless firewall filters, see the JUNOS Software Interfaces and Routing Configuration Guide.