aaa
local-user zhangsan privilege level 3 password cipher 123
local-user zhangsan service-type telnet

acl number 3001  
 rule 5 deny tcp source 12.1.1.7 0 destination 12.1.1.1 0 destination-port eq te
lnet 

telnet server enable
user-interface vty 0 4
authentication-mode password

[R1-ui-vty0-4]acl 3001 inbound