sonicwall一对一NAT配置实例（标准版）
假设拓扑：LAN 192.168.1.0/24 WAN 202.1.1.1，希望添加的内网邮件服务器 192.168.1.200，还拥有的公共地址 202.1.1.2。 配置步骤：
1、Network One-to-One NAT 2、Select Enable One-to-One NAT
3、Click Add. The Add NAT Entry window is displayed 4、Enter in the IP address, 192.168.1.200, in the Private Range Begin field.
5、 Enter in the IP address, 208.1.1.2, in the Public Range Begin field.
6、 Enter in 1 in the Range Length field. 7、Click OK. 8、Click Apply.
9、Click Firewall, then Access Rules. 10、Click Add.
11、Configure the following settings: Action - Allow Service - SMTP POP3 Source - WAN
Destination - LAN 192.168.1.200
In the Options tab, select always from the Apply this Rule
menu. 12、Click OK.