Ruijie RG-WLAN Series

Configuration Guide Configuring TCP
in continuous SYN flooding. When a device actively makes a request for a connection with an external
device, through telnet for example, shortening SYN timeout reduces user's wait time. You may prolong SYN
timeout properly on a poor network.
 Configuring TCP Window Size
Command
ip tcp window-size size
Parameter
Description
size: Indicates a TCP window size. It ranges from 128 to (65535 << 14) bytes. The default is 65535 bytes.
Command
Mode
Global configuration mode
Usage Guide
N/A
 Configuring the Sending of TCP Reset Packets After Receiving Port Unreachable Messages
Command
ip tcp send-reset
Parameter
Description
N/A
Command
Mode
Global configuration mode
Usage Guide
By default, TCP reset packet sending upon receiving port unreachable messages is enabled.
 Configuring MSS
Command
ip tcp mss max-segment-size
Parameter
Description
max-segment-size: Indicates the maximum segment size. It ranges from 68 to 10000 bytes. By default, the
MSS is calculated based on MTU.
Command
Mode
Global configuration mode
Usage Guide
This command defines the MSS for a TCP communication to be established. The negotiated MSS for a new
connection should be smaller than this MSS. If you want to reduce the MSS, run this command. Otherwise,
do not perform the configuration.
 Configuring MSS Value for TCPv4 SYN Packets
Command
ip tcp adjust-mss max-segment-size
Parameter
Description
max-segment-size: Indicates the maximum segment size, ranging from 500 to 1460 bytes
Command
Mode
Interface configuration mode
Usage Guide
N/A
 Configuring MSS Value for TCPv6 SYN Packet
Command
ipv6 tcp adjust-mss max-segment-size