3Com MSR 50, MSR 30 manual Tcp mss, Tcp state

801

Example # Enable the protection against Naptha attack.

<Sysname> system-view

[Sysname] tcp anti-naptha enable

tcp mss

Syntax tcp mss value

undo tcp mss

View Interface view

Parameter value: Maximum size of a packet in bytes, ranging from 128 to 2,048.

Description Use the tcp mss command to configure the maximum size of TCP packets.

Use the undo tcp mss command to restore the default.

By default, the maximum size of a TCP packet is 1460 bytes.

As the default MTU on an interface is 1500 bytes, and there are link layer cost and IP packet head, so the recommended maximum size of TCP packets is about 1200 bytes.

Example # Set the maximum size of TCP packets to 300 bytes on Ethernet1/0.

<Sysname> system-view

[Sysname] interface ethernet 1/0

[Sysname-Ethernet1/0] tcp mss 300

tcp state

Syntax	tcp state { closing established fin-wait-1 fin-wait-2 last-ack syn-received }
	connection-number number
	undo tcp state { closing established fin-wait-1 fin-wait-2 last-ack
	syn-received } connection-number
View	System view
Parameter	closing: CLOSING state of a TCP connection.
	established: ESTABLISHED state of a TCP connection.
	fin-wait-1: FIN_WAIT_1 state of a TCP connection.
	fin-wait-2: FIN_WAIT_2 state of a TCP connection.
	last-ack: LAST_ACK state of a TCP connection.