ISP Configuration in case of TATA (Unmanaged ILL)

[Aashish74]

ISP Configuration in case of TATA (Useful for Indian Customers willing to configure an unmanaged TATA ILL)

** This is useful in case you are not provided with a MUX or a ROUTER along with the Internet Link form the ISP**

If you are a customer willing to configure an unmanaged TATA ISP where you are provided with a LAN IP POOL and WAN IP POOL from the ISP end then follow the below steps as mentioned:

Considerations:

1. WAN IP AT THE CUSTOMER END: 1.1.1.1/30
2. WAN IP AT THE ISP END (This is the ISP Gateway): 1.1.1.2/30
3. LAN IP POOL GIVEN TO THE CUSTOMER BY THE ISP: 3.3.3.0/29

Configure as following:

1. Configure the WAN interface with 1.1.1/30 as its IP address.
2. Create two static routes:

• Route Name: TATA_WAN, Destination: 0.0.0.0/0, Interface: WAN Interface, Next Hop: 1.1.2/32, Metric: 10
• Route Name: TATA_LAN, Destination: 3.3.1/32 (use any IP from the LAN Pool as the LAN Gateway), Interface: WAN interface, Next Hop: 1.1.1.2/32, Metric: 10.

1. Create a source NAT for Internet access:

• Provide a useful name
• Select source zone as LAN
• Select Destination zone as WAN
• Interface as the WAN interface
• Source Translation, dynamic IP/port, Address type: Translated address: 3.3.2/32

1. Create a policy rule as required.

Check your Public IP as you should see 3.3.3.2 as your public IP

Hope this is helpful.

Cheers !!

Happy Learning 

[jdelio]

Thanks for helping out with these posts.. again, should help people if they are looking for help while configuring.

[Ardz_P]

Didn't work for me.  Did I miss something? Do I need a return route/NAT policy?

[Raido_Rattameister]

Just curious what is so different with TATA setup?

Why do they give LAN subnet?

What stops you using any LAN subnet as you perform NAT for outgoing traffic anyway?