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4 - Configuring the SAGEM F@st™ 1500 ADSL router
SAGEM F@st™ 1500 Reference Manual - 288053220-03
Page 4-42 Reproduction and communication prohibited without the written permission of E
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5) DoS Criteria and Port Scan Criteria
Set up DoS and port scan criteria in the spaces provided (as shown below).
Note: The firewall does not significantly affect system performance, so we advise enabling the
prevention features to protect your network.
Parameter Defaults Description
Total incomplete
TCP/UDP sessions
HIGH
300 sessions Defines the rate of new unestablished sessions that will cause
the software to start deleting half-open sessions.
Total incomplete
TCP/UDP sessions
LOW
250 sessions Defines the rate of new unestablished sessions that will cause
the software to stop deleting halfopen sessions.
Incomplete
TCP/UDP sessions
(per min) HIGH
250 sessions Maximum number of allowed incomplete TCP/UDP sessions
per minute.
Incomplete
TCP/UDP sessions
(per min) LOW
200 sessions Minimum number of allowed incomplete TCP/UDP sessions per
minute.
Maximum
incomplete
TCP/UDP sessions
number from same
host
10 Maximum number of incomplete TCP/UDP sessions from the
same host.
Incomplete
TCP/UDP sessions
detect sensitive
time period
300 msec Length of time before an incomplete TCP/UDP session is
detected as incomplete.
Maximum half open
fragmentation
packet number
from same host
30 Maximum number of half open fragmentation packets from the
same host.
Half-open
fragmentation
detect sensitive
time period
10000 msec Length of time before a half-open fragmentation session is
detected as half-open.
Flooding cracker
block time
300 second Length of time from detecting a flood attack to blocking the
attack.
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