Here's my `/etc/xinetd.d/tftp`, which is the default configuration:

    service tftp
    {
            socket_type             = dgram
            protocol                = udp 
            wait                    = yes 
            user                    = root
            server                  = /usr/sbin/in.tftpd
            server_args             = -s /tftpboot
            disable                 = yes 
            per_source              = 11
            cps                     = 100 2
            flags                   = IPv4
    }

I have two interfaces on my host:

1. lo: 127.0.0.1
2. virbr1: 192.168.122.1

And I connect the tftp server via the 2 interfaces respectively.

    tftp 127.0.0.1
    get somefile

The file is fetched from /tftpboot

    tftp 192.168.122.1
    get somefile

The file is fetched from `/var/lib/tftp`

I have no idea where this `/var/lib/tftp` configuration comes from.
Or maybe via 192.168.122.1, tftp servers fall back to some default 
configuration?

---

Mention that I didn't modify /etc/xinetd.conf either:

    defaults
    {
    # The next two items are intended to be a quick access place to
    # temporarily enable or disable services.
    #
    #       enabled         =
    #       disabled        =

    # Define general logging characteristics.
            log_type        = SYSLOG daemon info 
            log_on_failure  = HOST
            log_on_success  = PID HOST DURATION EXIT

    # Define access restriction defaults
    #
    #       no_access       =
    #       only_from       =
    #       max_load        = 0
            cps             = 50 10
            instances       = 50
            per_source      = 10

    # Address and networking defaults
    #
    #       bind            =
    #       mdns            = yes
            v6only          = no

    # setup environmental attributes
    #
    #       passenv         =
            groups          = yes
            umask           = 002

    # Generally, banners are not used. This sets up their global defaults
    #
    #       banner          =
    #       banner_fail     =
    #       banner_success  =
    }

    includedir /etc/xinetd.d