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The matching of packets by rules is connection-based, known as Stateful
Packet Inspection (SPI), using the FiOS Router's firewall mechanism. Once a
packet matches a rule, all subsequent packets with the same attributes receive
the same QoS parameters, both inbound and outbound. Connection-based
QoS also allows inheriting QoS parameters by some of the applications that
open subsequent connections. For instance, QoS rules can be defined on SIP,
and the rules will apply to both control and data ports (even if the data ports
are unknown). Applications that support such inheritance have an ALG in the
firewall. They are:
•
SIP
•
MSN Messenger/Windows Messenger
•
TFTP
•
FTP
•
MGCP
•
H.323
•
Port triggering applications
•
PPTP
•
IPSec
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FiOS Router User Manual
© 2009 Verizon. All Rights Reserved.
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