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HP 5120 SI Series User Manual

HP 5120 SI Series
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284
syn-received: SYN_RECEIVED state of a TCP connection.
connection-number number: Maximum number of TCP connections in a certain state. The argument
number is in the range of 0 to 500.
Description
Use the tcp state command to configure the maximum number of TCP connections in a state. When this
number is exceeded, the aging of TCP connections in this state will be accelerated.
Use the undo tcp state command to restore the default.
By default, the maximum number of TCP connections in each state is 5.
You need to enable the protection against Naptha attack before executing this command. Otherwise, an
error will be prompted.
You can respectively configure the maximum number of TCP connections in each state.
If the maximum number of TCP connections in a state is 0, the aging of TCP connections in this state will
not be accelerated.
Related commands: tcp anti-naptha enable.
Examples
# Set the maximum number of TCP connections in the ESTABLISHED state to 100.
<Sysname> system-view
[Sysname] tcp anti-naptha enable
[Sysname] tcp state established connection-number 100
tcp syn-cookie enable
Syntax
tcp syn-cookie enable
undo tcp syn-cookie enable
View
System view
Default level
2: System level
Parameters
None
Description
Use the tcp syn-cookie enable command to enable the SYN Cookie feature to protect the device against
SYN Flood attacks.
Use the undo tcp syn-cookie enable command to disable the SYN Cookie feature.
By default, the SYN Cookie feature is enabled.
Examples
# Enable the SYN Cookie feature.
<Sysname> system-view
[Sysname] tcp syn-cookie enable

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HP 5120 SI Series Specifications

General IconGeneral
BrandHP
Model5120 SI Series
CategorySwitch
LanguageEnglish

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