现有一台CISCO ASA5520,配置NAT如下
nat (inside,outside) source dynamic nat_lan interface
!
object network in-address
nat (inside,outside) static interface service tcp 4343 4343
object network in-3switch
nat (inside,outside) static interface service tcp telnet 11111
实际上，外网无法访问内网的4343端口和telnet 端口
经检查，发现nat (inside,outside) source dynamic nat_lan interface 存在时，static无效
经测试删除dynamic 后，static nat生效
其它配置如下
ciscoasa(config)# object network zxl
ciscoasa(config-network-object)#host 192.168.20.23
ciscoasa(config-network-object)#nat (inside,outside) static interface service tcp 3389 3388
ciscoasa(config-network-object)# object network fileserver
ciscoasa(config-network-object)# host 192.168.20.25
ciscoasa(config-network-object)# nat (inside,outside) static interface service tcp 443 443
no nat (inside,outside) source dynamic nat_lan interface
object network nat_lan
nat (inside,outside) static interface
access-list all extended permit ip any any
access-group all in interface outside
验证NAT信息
show nat detail
Show xlate查看实时地址转换信息