# tcp ack-rst-and-syn

#### Syntax

[ no ] [ ip ] tcp ack-rst-and-syn [ vrf vrfName ]

#### Release Information

Command introduced before JunosE Release 7.1.0
ip keyword made optional in JunosE Release 7.2.0.

#### Description

Enables TCP ACK message validation along with TCP RST and SYN attack protection on the virtual router. The no version disables this protection.

#### Options

- ip—Optional keyword for use with older scripts
- vrfName—Name of the VRF; string of 1–32 alphanumeric characters

#### Mode

Global Configuration