Before You Begin

Before you begin configuring stateful firewall filters, complete the following tasks:

• If you do not already have an understanding of stateful firewall filters, read Stateful Firewall Filters.
• Before you begin configuring stateful firewall filters and NAT, you must configure the interfaces on which to apply these services. To configure an interface, see the J-series Services Router Basic LAN and WAN Access Configuration Guide.

If a packet does not match any terms in a firewall filter rule, the packet is discarded. Take care you do not configure a stateful firewall filter that prevents you from accessing the Services Router after you commit the configuration. For example, if you configure a firewall filter that does not match HTTP or HTTPS packets, you cannot access the router with the J-Web interface.