From your network where Jio Set-Top-Box (STB), are you able to connect Jio Router (ping), no matter which external gateway (Jio or Airtel) you are using?
If yes, then you can give this a try, when STB reboot, it initiates a DNS query to jiofiber.casblock.html, now if you can create a DNS entry for this in your DNS prover or in PfSence, it might work (not sure).
If yes, then you can give this a try, when STB reboot, it initiates a DNS query to jiofiber.casblock.html, now if you can create a DNS entry for this in your DNS prover or in PfSence, it might work (not sure).
Code:
> jiofiber.casblock.html
Server: securedns.lan
Address: 192.168.0.3
Non-authoritative answer:
Name: jiofiber.casblock.html
Address: 192.168.29.1