一、实验拓扑: 二、实验要求: 1、ACL抓取Telnet、ICMP流量并放行,在全局下应用: 2、做完以后,R1去telnetR2、R3看是否可行? 3、ACL抓取Telnet流量并拒绝;在接口Outside应用; 4、查看接口ACL和全局ACL哪个优先,R1是否还可以Telnet R2? 三、命令部署: 1、Global调用ACL命令: ASA(config)# access-list glo extended permit icmp any any ASA(config)# access-list glo extended permit tcp any any eq telnet ASA(config)# access-group glo global

2、接口下调用ACL命令: ASA(config)# access-list jiekou extended deny tcp any any eq 23 ASA(config)# access-group jiekou in interface outside

四、验证: 1、部署完global命令后: R1#telnet 10.1.1.2 Trying 10.1.1.2 ... Open User Access Verification Username: bb Password: R2> 2、接口下调用ACL命令: R1#telnet 10.1.1.2 Trying 10.1.1.2 ... % Connection timed out; remote host not responding 结论:接口ACL优先级高于Global