Table 301: Add Access Control List Rule Fields (continued)
Field
Description
Source IP Address / Wildcard
Mask
The source port IP address in the packet and source IP wildcard mask (in the
second field) to compare to the IP address in a packet header. Wild card
masks determines which bits in the IP address are used and which bits are
ignored. A wild card mask of 255.255.255.255 indicates that no bit is
important. A wildcard of 0.0.0.0 indicates that all of the bits are important.
Wildcard masking for ACLs operates differently from a subnet mask. A
wildcard mask is in essence the inverse of a subnet mask. With a subnet
mask, the mask has ones (1's) in the bit positions that are used for the
network address, and has zeros for the bit positions that are not used. In
contrast, a wildcard mask has zeros in a bit position that must be checked. A
'1' in a bit position of the ACL mask indicates the corresponding bit can be
ignored. This field is required when you configure a source IP address.
Source L4 Port
(IPv4 Extended and IPv4 Named ACLs) The TCP/UDP source port to match
in the packet header. The Source L4 Port and Destination L4 port are
configurable only if protocol is either TCP or UDP. Equal to, Not Equal to,
Greater than, and Less than options are available.
•
For TCP protocol: BGP, Domain, Echo, FTP, FTP-Data, HTTP, SMTP, Telnet,
WWW, POP2, or POP3
•
For UDP protocol: Domain, Echo, NTP, RIP, SNMP, TFTP, Time, or WHO
Destination IP Address /
Wildcard Mask
The destination port IP address in the packet and destination IP wildcard
mask (in the second field) to compare to the IP address in a packet header.
Wild card masks determines which bits in the IP address are used and which
bits are ignored. A wild card mask of 255.255.255.255 indicates that no bit is
important. A wildcard of 0.0.0.0 indicates that all of the bits are important.
Wildcard masking for ACLs operates differently from a subnet mask. A
wildcard mask is in essence the inverse of a subnet mask. With a subnet
mask, the mask has ones (1's) in the bit positions that are used for the
network address, and has zeros for the bit positions that are not used. In
contrast, a wildcard mask has zeros in a bit position that must be checked. A
1 in a bit position of the ACL mask indicates the corresponding bit can be
ignored. This field is required when you configure a destination IP address.
Destination L4 Port
(IPv4 Extended and IPv4 Named ACLs) The TCP/UDP destination port to
match in the packet header. The Source L4 Port and Destination L4 port are
configurable only if protocol is either TCP or UDP. Equal to, Not Equal to,
Greater than, and Less than options are available.
•
For TCP protocol: BGP, Domain, Echo, FTP, FTP-Data, HTTP, SMTP, Telnet,
WWW, POP2, or POP3
•
For UDP protocol: Domain, Echo, NTP, RIP, SNMP, TFTP, Time, or WHO
TTL Field Value
(IPv4 Extended and IPv4 Named ACLs) IP ACL rule to match on the specified
Time-to-Live (TTL) field value.
IGMP Type
(IPv4 Extended and IPv4 Named ACLs) IP ACL rule to match on the specified
IGMP message type. This option is available only if the protocol is IGMP.
ICMP Type
(IPv4 Extended and IPv4 Named ACLs) IP ACL rule to match on the specified
ICMP message type. This option is available only if the protocol is ICMP.
ICMP Code
(IPv4 Extended and IPv4 Named ACLs) IP ACL rule to match on the specified
ICMP message code. This option is available only if the protocol is ICMP.
Configuring Quality of Service
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