Requirements (cont.) REQ-5: It is RECOMMENDED that a firewall have an "External filtering is endpoint address dependent" behavior. (EF=AD) REQ-5a: A firewall MAY have an "External filtering is endpoint independent" behavior. (EF=I) REQ-5b: A firewall MAY have an "External filtering is endpoint address and port dependent" behavior. (EF=APD) REQ-6: The firewall UDP filter timeout behavior MUST be the same as the NAT UDP binding timeout. |