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How do I test port 49 (TACACS) availability from the Cisco Router

Hello Guys,


Good day to all and hope you doing fine.


I'm configuring TACACS to my router. However, between router and tacacs server there is a firewall in the middle who was manage the port and ip restriction management.


Router <====> Firewall <====> TACACS Server.


My question, how can i test the port availability of TACACS server (TCP 49) is already open by the firewall before i make configuration ?Where i can confirm the port 49 on the TACACS server IP was succesfully open. Therefore i can start configure the TACACS configuration inside the router.


Many Thanks



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