R1#show running-config
Building configuration...

Current configuration : 1992 bytes
!
version 15.8
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
no service dhcp
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hostname R1
!
boot-start-marker
boot-end-marker
!
!
!
no aaa new-model
!
!
!
!
!
!
!
!
!
!
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ip cef
no ipv6 cef
multilink bundle-name authenticated
!
!
!
license udi pid C921-4P sn PSZ26221HSZ
!
!
!
spanning-tree portfast bpduguard
!
redundancy
!
!
!
!
!
!
interface GigabitEthernet0
 no ip address
!
interface GigabitEthernet1
 no ip address
!
interface GigabitEthernet2
 no ip address
!
interface GigabitEthernet3
 no ip address
!
interface GigabitEthernet4
 ip address dhcp
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface GigabitEthernet5
 ip address 10.10.0.254 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
 duplex auto
 speed auto
!
interface Vlan1
 no ip address
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip nat pool PORTFWD 10.10.0.25 10.10.0.25 netmask 255.255.255.0 type rotary
ip nat inside source list 50 interface GigabitEthernet4 overload
ip nat inside source static tcp 10.10.0.25 5060 10.161.1.24 5060 extendable
ip nat inside source static udp 10.10.0.25 5060 10.161.1.24 5060 extendable
ip nat inside source static tcp 10.10.0.15 5800 10.161.1.24 5800 extendable
ip nat inside source static tcp 10.10.0.15 5900 10.161.1.24 5900 extendable
ip nat inside source static tcp 10.10.0.25 9051 10.161.1.24 9051 extendable
ip nat inside source static udp 10.10.0.25 9051 10.161.1.24 9051 extendable
ip nat inside source static tcp 10.10.0.25 9061 10.161.1.24 9061 extendable
ip nat inside source static tcp 10.10.0.15 9087 10.161.1.24 9087 extendable
ip nat inside source static tcp 10.10.0.25 9091 10.161.1.24 9091 extendable
ip nat inside destination list 100 pool PORTFWD
!
!
!
access-list 50 permit any
access-list 100 permit udp any any range 50000 50400
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control-plane
!
!
line con 0
line vty 0 4
 login
 transport input none
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scheduler allocate 20000 1000
!
end

R1#