“:::Configure a Cisco Router 1841 Back a Firewall for an HDSL Connection with a Internal PBX VoIP:::”

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With this how-to I report of following the configuration of a Cisco Router 1841 for a HDSL Connection, the device is also connected to a firewall and a Internal PBX. In this case the configuration of  router is clear, without security restrictions.

ROUTER-A

ip domain name testsite.co.uk

!

ip name-server 82.x.x.1

ip name-server 82.x.x.2

!

username ADMIN privilege 15 secret 0 SECRETADMIN

!

!

interface FastEthernet0/0

 description *** ROUTER -> FIREWALL ***

 ip address 178.x.x.249 255.255.255.248

 duplex auto

 speed auto

 no keepalive

!

interface FastEthernet0/1

 description *** ROUTER -> PBX  ***

 ip address 95.x.x.249 255.255.255.248

 ip policy route-map PBR

 duplex auto

 speed auto

 no keepalive

!

interface Serial0/0/0

 no ip address

 encapsulation frame-relay IETF

 logging event subif-link-status

 logging event dlci-status-change

 load-interval 30

 no fair-queue

 frame-relay lmi-type cisco

!

interface Serial0/0/0.1 point-to-point

 description *** EXTERNAL NETWORK LINK DATA FOR MCR 1024 ***

 ip address 81.x.x.190 255.255.255.252

 no cdp enable

 no arp frame-relay

 frame-relay interface-dlci 100 IETF

!

interface Serial0/0/0.2 point-to-point

 description *** EXTERNAL NETWORK LINK FOR VOIP ***

 ip address 81.x.x.234 255.255.255.252

 no arp frame-relay

 frame-relay interface-dlci 101 IETF

!

ip classless

ip route 0.0.0.0 0.0.0.0 Serial0/0/0.1

ip route 0.0.0.0 0.0.0.0 Serial0/0/0.2 20

!

no ip http server

!

ip access-list extended WILDIX

permit ip 95.x.x.248 0.0.0.7 any

!

route-map PBX permit 10

 match ip address WILDIX

 set interface Serial0/0/0.2