! ==========================================
! Router R1 (Enterprise Edge Router with Static NAT)
! Lab: Static NAT and Inside Server Publishing (PTL-0021)
! ==========================================
enable
configure terminal
hostname R1
no ip domain-lookup

! LAN Interface (Inside NAT Domain)
interface GigabitEthernet0/0/0
 description Inside Private Server LAN
 ip address 192.168.10.1 255.255.255.0
 ip nat inside
 duplex auto
 speed auto
 no shutdown
 exit

! WAN Interface (Outside NAT Domain)
interface GigabitEthernet0/0/1
 description Outside Uplink to ISP
 ip address 203.0.113.1 255.255.255.248
 ip nat outside
 duplex auto
 speed auto
 no shutdown
 exit

! Static One-to-One NAT Translation (Inside Local -> Inside Global)
ip nat inside source static 192.168.10.80 203.0.113.5

! Default Route to ISP Gateway
ip route 0.0.0.0 0.0.0.0 203.0.113.2

end
copy running-config startup-config