interface FastEthernet0/0.0には
no ip address
shutdown
と設定して

interface FastEthernet0/0.1には
encapsulation pppoe
auto-connect
ppp binding ISP名
ip address ipcp
ip napt enable
ip napt service ping 192.168.111.2 none icmp any
ip napt service SSH 192.168.111.2 none tcp 22
ip napt service SMTP 192.168.111.2 none tcp 25
ip napt service http 192.168.111.2 none tcp 80
ip napt service https 192.168.111.2 443 tcp 443
ip napt service POP 192.168.111.2 none tcp 110
ip napt service NTP 192.168.111.2 none udp 123
ip napt service SMTP-587 192.168.255.2 none tcp 587
ip napt service POP-SSL 192.168.255.2 none tcp 995
ip filter 先に定義したフィルタをほにゃらら
no shutdown
として