Command Line Interface Reference Guide > The SLB Configuration Menu
/cfg/slb/filt <filter number>/adv/security/ratelim
Advanced Security Rate Limiting Configuration Menu
 
[Rate Limiting Menu]
maxconn - Set maximum connections for rate limiting
timewin - Set time window for rate limiting
holddur - Set hold down duration for rate limiting
ena - Enable TCP, UDP, or ICMP rate limiting
dis - Disable TCP, UDP, or ICMP rate limiting
cur - Display current rate limiting configuration
 
Rate Limiting Advanced Menu Options (/cfg/slb/filt/adv/security/ratelim) 
Command Syntax and Usage
maxconn <# of connections in units of 10 (0-255)>
 
Specifies the maximum number of connections for protocol rate limiting.
The function of this parameter depends on the protocol. For TCP connection rate limiting, this is the maximum number of connections. For ICMP and UDP rate limiting, this is the maximum number of packets.
Note: Alteon multiplies the value entered by 10.
Default: 10
timewin <seconds, 1-65535>
 
Specifies the time window, in seconds, for protocol rate limiting, during which packets are allowed to be received. The time window can be configured per filter.
Default: 1
holddur <minutes, 2-65535>
 
Specifies the multiplier to be used to define the hold-down duration, in minutes, for protocol rate limiting.
The hold-down duration is calculated as follows:
holddown_time = holddur X slowage_time
where
*holddur is the value entered for this command.
*slowage_time is 2 X 2^slowage.
When the number of new connections or packets exceeds the configured limit, any new TCP connection requests or UDP/ICMP packets from the client are blocked. When blocking occurs, the client is said to be held down. The client is held down for a specified number of minutes, after which new TCP connection requests or packets from the client are allowed once again to pass through. The hold-down duration can be configured per filter.
Default: 2
For more information on the slowage time, see /cfg/slb/adv Advanced Layer 4 Configuration.
For more information on the hold duration, see the Alteon Command Line Interface Application Guide.
ena
 
Enables the protocol for rate limiting. Rate limiting is applied to the protocol configured on the filter. The supported protocols are: TCP, UDP, ICMP
dis
 
Disables TCP, UDP, or ICMP rate limiting.
cur
 
Displays the current rate limiting configuration.