TMS zl Management and Configuration Guide ST.1.2.100916

1-51
Overview
Firewall
Table 1-6. Connection Limit Terminology
Reservation Process
The TMS zl Module invokes the connection reservation policy under the
following circumstances:
■ The per-zone connection limit that corresponds to the traffic has been
reached.
■ The number of total active connections in the system has reached the total
active connections threshold.
When this threshold has been reached, non-reserved IP addresses cannot
make any connections even if their zone limits have not been reached.
Only the reserved IP addresses can make connections.
For a definition of the total active connection threshold see Table 1-6.
Term Meaning Maximum Value Default Value Example
Per-zone connection
limit
The total number of
connections that can
originate from a zone
600,000 • External = 150,000
• Internal = 150,000
• DMZ = 150,000
• Self = 21,428
• Zone1–Zone6 =
21,428
• External = 10,000
• Internal = 10,000
• Zone1 = 7,000
• Zone2 = 5,000
• Self = 3,000
• Zone3–Zone6 = 0
Global maximum
connections
The sum of all per-zone
connection limits
600,000 599,996 35,000
Reservation
connection count
The number of
connections reserved
for each IP address
specified in the
reservation
1500 per IP address
per connection
reservation
0 • 20 outbound for
each address
between 10.1.1.1
and 10.1.1.40
• 60 inbound for each
address between
10.1.2.1 and
10.1.1.20
Total reserved
connection count
The total number of
connections reserved
for traffic to or from
specified IP addresses
600,000 0 2000
Total active connec-
tion threshold
The number of global
maximum connections
minus the total
reserved connection
count
600,000 599,996 33,000