SMC Networks 7904WBRB2, Manual

Page: 110 / 146

C
ONFIGURING THE
ADSL R
OUTER
4-66
•
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, and leaving them at the
default settings 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 half-
open 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.