Tacacs over IPv6

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http://unix.stackexchange.com – I have migrated my Redhat Enterprise linux server 5.5 to IPv6 . Now I want to run tacacs+ for IPv6. When testing from my client, it returns "unable to connect to server for IPv6 address", but for IPv4 it’s working fine. Snapshot of Linux listening port: [root@ADA-Linux-Service-2 ~]# netstat -an | grep :49 tcp 0 0* LISTEN Once the tacacs service is started, I tried using the bind option with IPv6 it returns the following error: Reading config Version F4.0.4.26 Initialized 1 get_socket: bind 49 Address already in use I (HowTos)