Carrier Access Multi-Service Router (MSR) Card MSR/Adit 3K GUI - Manual (Page 182)

4-28 Adit 3000 (Rel. 1.6) and MSR Card (Rel 2.0) GUI
Security
Advanced Filtering
Advanced Filtering
Advanced filtering is designed to allow comprehensive control over the firewall’s behavior. You can
define specific input and output rules, control the order of logically similar sets of rules, and make a
distinction between rules that apply to WAN and LAN network devices. There are two groups of rule
sets:
Input Rule Sets
Output Rule Sets
Input and Output Rule Sets
Field Definition
Initial Rules Initial rules are applied against packets at any interface before applying
any other configured firewall settings. See Firewall Implementation on
page 4-37 for actual sequence.
Ethernet 1 Rules Interface specific rules are applied against packets at that particular
interface immediately after applying the Initial rules. See Firewall
Implementation on page 4-37 for actual sequence.
Note: The list of connections varies depending on the current
connections configured.
Ethernet 2 Rules
Serial 1 Rules
Multilink 1 Rules
Final Rules
Final rules are applied against packets after applying all other configured
firewall settings, and before applying the General Security Policy. See
Firewall Implementation on page 4-37 for actual sequence.