Alcatel-Lucent 7450 Configuration Manual page 533

tcp-ack
Syntax tcp-ack {true | false}
no tcp-ack
Context config>filter>ip-filter>entry>match
config>filter>ipv6-filter>entry>match
Description
This command configures matching on the ACK bit being set or reset in the control bits of the TCP
header of an IP packet as an IP filter match criterion. Note that an entry containing Layer 4 non-zero
match criteria will not match non-initial (2nd, 3rd, etc) fragments of a fragmented packet since only
the first fragment contains the Layer 4 information.
The no form of the command removes the criterion from the match entry.
Default no tcp-ack
Parameters
true — Specifies matching on IP packets that have the ACK bit set in the control bits of the TCP
false — Specifies matching on IP packets that do not have the ACK bit set in the control bits of the
tcp-syn
Syntax tcp-syn {true | false}
no tcp-syn
Context config>filter>ip-filter>entry>match
config>filter>ipv6-filter>entry>match
Description
This command configures matching on the SYN bit being set or reset in the control bits of the TCP
header of an IP packet as an IP filter match criterion. Note that an entry containing Layer 4 non-zero
match criteria will not match non-initial (2nd, 3rd, etc) fragments of a fragmented packet since only
the first fragment contains the Layer 4 information.
The SYN bit is normally set when the source of the packet wants to initiate a TCP session with the
specified destination IP address.
The no form of the command removes the criterion from the match entry.
Default
no tcp-syn
Parameters true — Specifies matching on IP packets that have the SYN bit set in the control bits of the TCP
false — Specifies matching on IP packets that do not have the SYN bit set in the control bits of the
7450 ESS Router Configuration Guide
header of an IP packet.
TCP header of the IP packet.
header.
TCP header.
Filter Policies
Page 533