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Cisco 1921 Configuration for IP private ISP + Public IP Wan + DHCP Private Network

hi, 

I have to configure a 1921 Cisco Router , i  search on multiple video how to..no problem

 

But in my case, the ISP send me that his Wan Network type exemple 192.168.23.82/30 and  IP Public 41.110.187.86/30

 

i need to configure also this Cisco 1921 in DHCP for the workstation network 192.168.1.0

 

how the Cisco with two Ethernet interface can do that ..?

 

thanks by advance

Djamel

6 Replies 6

Hello

The basic setup internet connectivity is fairly straight forward, Whats not included here is hardening of the router for security purposes which is a bit more in depth. but it could be possible you may have an ISP modem peforming FW activites infront of your router also?

 

Note: I have used a public dns server for name resolution in dhcp, Obviously change this to your ISP's if applicable, and the public addressing I have given the router the higher of the two addresses, but this could be the other way round.


int fa0/0
description WAN Interface
ip address  192.168.23.84 255.255.255.252


int fa0/1
description LAN
ip address 192.168.1.1 255.255.255.0
 

ip dhcp pool LAN-Addressing
network 192.168.1.0 255.255.255.0
dns-server 8.8.8.8
default-router 192.168.1.1
lease 0 12

ip dhcp excluded-address 192.168.1.1

ip route 0.0.0.0 0.0.0.0 FastEthernet0/0  192.168.23.83 name ISP-NEXTHOP

 

res

Paul


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

thanks for response...but the ISP send two IP ...

the WAN Network IP 192.168.23.82/30

and the Public Netword IP 41.110.187.86/30

 

So My network will be 

   ISP  Gateway                                 My Router 1921                                        Private Local LAN

 192.168.23.83                   WAN0/1:192.168.23.84 / Public:41.110.187.87           192.168.1.x

                                                            LAN0/0:192.168.1.1

thanks

Hello

Okay so it seems that your isp is most probably natting for you so I have revised the config

res

Paul


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

Hi.. don't see your revised config... 

Can you send it 

Thanks 

Hello

i edited my first post please review it

 

res

paul


Please rate and mark as an accepted solution if you have found any of the information provided useful.
This then could assist others on these forums to find a valuable answer and broadens the community’s global network.

Kind Regards
Paul

meharihadis
Level 1
Level 1

Dears

How are u?

Can you help me for the following issue

Let say my customer is public IP custo mer

I.e my ISP gives two WAN IP address

10.187.63.26/30

167.178.64.56/29

And also lan IP 192.168.0.1/24

So how I can configure these IP addresses .pls help me As much as possible.

 

 

 

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