ISP Configuration in case of TATA (Unmanaged ILL)

Aashish74 — Mon, 02 Dec 2019 16:07:00 GMT

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:

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

Configure as following:

Configure the WAN interface with 1.1.1/30 as its IP address.
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.

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

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

Re: ISP Configuration in case of TATA (Unmanaged ILL)

jdelio — Tue, 03 Dec 2019 00:04:34 GMT

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

Re: ISP Configuration in case of TATA (Unmanaged ILL)

Ardz_P — Sat, 25 Mar 2023 11:42:38 GMT

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

Re: ISP Configuration in case of TATA (Unmanaged ILL)

Raido_Rattameister — Sat, 25 Mar 2023 19:44:33 GMT

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?

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ISP Configuration in case of TATA (Unmanaged ILL)

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