rst-sequence-check

Syntax

Hierarchy Level

Release Information

Statement introduced in Release 8.5 of Junos OS.

Description

Verify that the TCP sequence number in a TCP segment with the RST bit enabled matches the previous sequence number for a packet in that session or is the next higher number incrementally. If the sequence number does not match either of these expected numbers, the device drops the packet and sends the host a TCP ACK message with the correct sequence number. By default, this check is disabled.

Usage Guidelines

For configuration instructions and examples, see the Junos OS Security Configuration Guide.

Required Privilege Level

security—To view this statement in the configuration.

security-control—To add this statement to the configuration.