FW

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FW(config)# hostname FW

FW(config)# interface GigabitEthernet0/0
FW(config-if)# nameif inside
FW(config-if)# security-level 100
FW(config-if)# ip address 172.16.10.254 255.255.255.0
FW(config-if)# no shutdown

FW(config)# interface GigabitEthernet0/1
FW(config-if)# nameif dmz
FW(config-if)# security-level 50
FW(config-if)# ip address 172.16.20.254 255.255.255.0
FW(config-if)# no shutdown

FW(config)# interface GigabitEthernet0/2
FW(config-if)# nameif office
FW(config-if)# security-level 70
FW(config-if)# ip address 172.16.30.254 255.255.255.0
FW(config-if)# no shutdown

FW(config)# interface GigabitEthernet0/3
FW(config-if)# nameif outside
FW(config-if)# security-level 0
FW(config-if)# ip address 2.61.243.1 255.255.255.0
FW(config-if)# no shutdown

FW(config-if)# router eigrp 100
FW(config-router)# network 172.16.10.0 255.255.255.0
FW(config-router)# network 172.16.20.0 255.255.255.0
FW(config-router)# network 172.16.30.0 255.255.255.0
FW(config-router)# network 2.61.243.0 255.255.255.0

FW(config)# object network out
FW(config-network-object)# host 172.16.30.2
FW(config-network-object)# nat (office,outside) static 2.61.243.3

FW(config)# access-list outside extended permit host 185.6.12.1 172.16.20.0 255.255.255.0
FW(config)# access-list outside extended permit ip any host 172.16.30.2
FW(config)# access-list dmz extended permit icmp any any
FW(config)# access-list office extended permit icmp any any
FW(config)# access-list inside extended permit icmp any any

FW(config)# access-group inside in interface inside 
FW(config)# access-group dmz in interface dmz
FW(config)# access-group office in interface office
FW(config)# access-group outside in interface outside

ISP

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router>en
router>conf t
router(config)# hostname ISP

ISP(config)# interface GigabitEthernet0/0
ISP(config-if)# ip address 2.61.243.2 255.255.255.0
ISP(config-if)# no shutdown

ISp(config)# interface GigabitEthernet0/1
ISp(config-if)# ip address 185.6.12.254 255.255.255.0
ISP(config-if)# no shutdown

ISp(config)# interface loopback 0
ISp(config-if)# ip address 8.8.8.8 255.255.255.255
ISP(config-if)# no shutdown

ISP(config-if)# router eigrp 100
ISP(config-router)# network 185.6.12.0 255.255.255.0
ISP(config-router)# network 2.61.243.0 255.255.255.0