Denial Of Service - NETGEAR GS728TS Admin Manual

GS728TS, GS728TPS, GS752TS, and GS752TPS Gigabit Smart Switches
Field
Last Attempt Status
Requests
Failed Requests
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Denial of Service

Use the Denial of Service (DoS) page to configure DoS control. The GS728TS, GS728TPS,
GS752TS, and GS752TPS switches provide support for classifying and blocking specific
types of DoS attacks. The type of DoS attacks the switch can detect and prevent are
described on page 47.
Auto-DoS Configuration
The Auto-DoS Configuration page lets you automatically enable all the DoS features available
on the switch, except for TCP and UDP port attacks. See
information about the types of DoS attacks the switch can monitor and block.
Note: When Auto-DoS is enabled, a port that is under attack is
automatically shut down and does not forward traffic. The port can
be enabled only manually by the admin user. A warning message is
logged to the buffered log and is sent to the Syslog server.
Description
Specifies the status of the last SNTP request to this server. If no packet has
been received from this server, a status of Other is displayed:
• Other: None of the following enumeration values.
• Success: The SNTP operation was successful and the system time was
updated.
• Request Timed Out: A directed SNTP request timed out without receiving
a response from the SNTP server.
• Bad Date Encoded: The time provided by the SNTP server is not valid.
• Version Not Supported: The SNTP version supported by the server is not
compatible with the version supported by the client.
• Server Unsynchronized: The SNTP server is not synchronized with its
peers. This is indicated via the 'leap indicator' field on the SNTP message.
• Server Kiss Of Death: The SNTP server indicated that no further queries
were to be sent to this server. This is indicated by a stratum field equal to
0 in a message received from a server.
Specifies the number of SNTP requests made to this server since last agent
reboot.
Specifies the number of failed SNTP requests made to this server since last
reboot.
45
DoS Configuration on page 47 for