HP 6120XG HP ProCurve Series 6120 Blade Switches Access Security Guide - Page 392
Enable ACL “Deny” Logging, Requirements for Using ACL Logging
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IPv4 Access Control Lists (ACLs) Enable ACL "Deny" Logging 6. If the configuration appears satisfactory, save it to the startup-config file: ProCurve(config)# write memory Enable ACL "Deny" Logging ACL logging enables the switch to generate a message when IP traffic meets the criteria for a match with an ACE that results in an explicit "deny" action. You can use ACL logging to help: ■ Test your network to ensure that your ACL configuration is detecting and denying the traffic you do not want forwarded ■ Receive notification when the switch detects attempts to transmit traffic you have designed your ACLs to reject The switch sends ACL messages to Syslog and optionally to the current console, Telnet, or SSH session. You can configure up to six Syslog server destinations. Requirements for Using ACL Logging ■ The switch configuration must include an ACL (1) assigned to an interface and (2) containing an ACE configured with the deny action and the log option. ■ To screen routed packets with destination IP addresses outside of the switch, IP routing must be enabled. ■ For ACL logging to a Syslog server, the server must be accessible to the switch and identified (with the logging < ip-addr > command) in the switch configuration. ■ Debug must be enabled for ACLs and one or both of the following: • logging (for sending messages to Syslog) • Session (for sending messages to the current console interface) 9-68
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