問題1：Rsync未何不需要設定密碼,也可以同步

問題2：rsync既然是由xinetd啟動,未何查看rsyncd.service服務顯示為關閉（xinetd有啟動,同步正常）

問題3：同步的密碼沒有設定,會有何安全上的風險

系統為CentOS 7.8 以下為server端的設定

[root@centos ~]# vim /etc/xinetd.d/rsync
service rsync
{
        disable = no
        flags           = IPv4
        socket_type     = stream
        wait            = no
        user            = root
        server          = /usr/bin/rsync
        server_args     = --daemon
        log_on_failure  += USERID
}

[root@centos ~]# vim /etc/rsyncd.conf

[TYN]
path = /mnt/d/TYN
hosts allow = 192.168.16.2
hosts deny = *
list = true
uid = root
gid = root
read only = false

Clinet端設定

[root@centos ~]# vim /etc/lsyncd.conf

settings {
   inotifyMode = "CloseWrite",
   maxProcesses = 8,
   statusInterval = 180,
   statusFile = "/tmp/lsyncd.status",
   logfile = "/var/log/lsyncd/lsyncd.log",
}
sync {
    default.rsync,
    source = "/mnt/d/TYN2",
    target = "192.168.16.4::TYN",
    init = false,
exclude = { ".*", "*.tmp", "*.swp", "*.bak", "*.log", "*.swx", "*.db"},

    rsync = {
        binary = "/usr/bin/rsync",
        archive = true, 
        compress = true,
        verbose = false,
        _extra    = {"--bwlimit=200"}
        }
    }

問題1：

手動傳輸成功
是因為我server端的rsyncd.conf沒有加secrets file ＝ /etc/rsyncd.secrets 這行程式嘛？？？

所以手動傳輸時才不用在在多一行--password-file=/etc/rsyncd.secrets

[root@centos ~]# rsync --progress /mnt/d/lsync+rsync.txt 192.168.16.4::TYN
lsync+rsync.txt
          4,650 100%    0.00kB/s    0:00:00 (xfr#1, to-chk=0/1)

問題2：

檢視rsyncd.service顯示為關閉

[root@centos ~]# systemctl status rsyncd.service
\u25cf rsyncd.service - fast remote file copy program daemon
   Loaded: loaded (/usr/lib/systemd/system/rsyncd.service; disabled; vendor preset: disabled)
   Active: inactive (dead)