ADTRAN AOS Version R10.1.0 Command Reference Manual page 1203

Command Reference Guide
ipv6 firewall check tcp-seq-and-ack
Use the ipv6 firewall check tcp-seq-and-ack command to direct the Internet Protocol version 6 (IPv6)
firewall to inspect each packet of a Transmission Control Protocol (TCP) flow to ensure that the sequence
numbers and acknowledgement (ACK) numbers are within the expected window for that firewall session.
Use the no form of this command to disable the TCP sequence and ACK number check. Variations of this
command include:
ipv6 firewall check tcp-seq-and-ack
ipv6 firewall vrf <name> check tcp-seq-and-ack
Syntax Description
vrf <name>
Default Values
By default, the TCP sequence and ACK number check is enabled.
Command History
Release R10.1.0
Usage Examples
The following example enables the TCP sequence and ACK number check on the nondefault VRF
instance RED1:
(config)#ipv6 firewall vrf RED1 check tcp-seq-and-ack
60000CRG0-35E
Optional. Specifies a nondefault (named) Virtual Routing and Forwarding
(VRF) instance on which to enable or disable the TCP sequence and ACK
number check. If no VRF instance is specified, the action is performed on
the default VRF instance.
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
Global Configuration Mode Command Set
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