H3C Technologies H3C SR8800 - Manual (Page 17)

8
Configuring an advanced ACL
Configuring an IPv4 advanced ACL
IPv4 advanced ACLs match packets based on source and destination IP addresses, protocols over IP, and
other protocol header information, such as TCP/UDP source and destination port numbers, TCP flags,
ICMP message types, and ICMP message codes.
IPv4 advanced ACLs also allow you to filter packets based on these priority criteria: type of service (ToS),
IP precedence, and differentiated services codepoint (DSCP) priority.
Compared to IPv4 basic ACLs, IPv4 advanced ACLs allow more flexible and accurate filtering.
To configure an IPv4 advanced ACL:
Step Command Remarks
1. Enter system view. system-view N/A
2. Create an IPv4 advanced
ACL and enter its view.
acl number acl-number [ name
acl-name ] [ match-order { auto |
config } ]
By default, no ACL exists.
IPv4 advanced ACLs are
numbered in the range 3000 to
3999.
You can use the acl name acl-name
command to enter the view of a
named IPv4 ACL.
3. Configure a description for
the IPv4 advanced ACL.
description text
Optional.
By default, an IPv4 advanced ACL
has no ACL description.
4. Set the rule numbering step. step step-value
Optional.
The default setting is 5.
5. Create or edit a rule.
rule [ rule-id ] { deny | permit }
protocol [ { { ack ack-value | fin
fin-value | psh psh-value | rst
rst-value | syn syn-value | urg
urg-value } * | established } |
counting | destination { dest-addr
dest-wildcard | any } |
destination-port operator port1
[ port2 ] | dscp dscp | fragment |
icmp-type { icmp-type [ icmp-code ]
| icmp-message } | logging |
precedence precedence | reflective
| source { sour-addr sour-wildcard
| any } | source-port operator
port1 [ port2 ] | time-range
time-range-name | tos tos |
vpn-instance vpn-instance-name ] *
By default, an IPv4 advanced ACL
does not contain any rule.
To create or edit multiple rules,
repeat this step.
The logging keyword takes effect
only when the module (for
example, a packet-filter firewall)
using the ACL supports logging.
6. Configure or edit a rule
description.
rule rule-id comment text
Optional.
By default, an IPv4 advanced ACL
rule has no rule description.