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3-81
Configuring an Extended IP ACL
Command Attributes
• Action – An ACL can contain any combination of permit or deny
rules.
• Source/Destination Address Type – Specifies the source or
destination IP address. Use “Any” to include all possible addresses,
“Host” to specify a specific host address in the Address field, or “IP”
to specify a range of addresses with the Address and SubMask fields.
(Options: Any, Host, IP; Default: Any)
• Source/Destination Address – Source or destination IP address.
• Source/Destination Subnet Mask – Subnet mask for source or
destination address. (See the description for Subnet Mask on
page 3-79.)
• Service Type – Packet priority settings based on the following criteria:
- Precedence – IP precedence level. (Range: 0-7)
- TOS – Type of Service level. (Range: 0-15)
- DSCP – DSCP priority level. (Range: 0-63)
• Protocol – Specifies the protocol type to match as TCP, UDP or
Others, where others indicates a specific protocol number (0-255).
(Options: TCP, UDP, Others; Default: TCP)
• Source/Destination Port – Source/destination port number for the
specified protocol type. (Range: 0-65535)
• Control Code – Decimal number (representing a bit string) that
specifies flag bits in byte 14 of the TCP header. (Range: 0-63)
• Control Code Bitmask – Decimal number representing the code bits
to match. The control bitmask is a decimal number (for an equivalent
binary bit mask) that is applied to the control code. Enter a decimal
number, where the equivalent binary bit “1” means to match a bit and
“0” means to ignore a bit. The following bits may be specified:
-1 (fin) – Finish
- 2 (syn) – Synchronize