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I am trying to configure TCP wrapper to deny access from ftp clietn. I want to use domain format syntax in client list of /etc/hosts.deny as below. FTP service is the target daemon in my case.

vsftpd : .ywlocal.net

However, I have defined host name of ftp client(tester1) in /etc/hosts as below but vsftpd is still accepting the connection from the client.

127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.11.17 tester1 tester1.ywlocal.net

I also have hostname of client in fqdn form.

[root@tester1 ~]# hostname
tester1.ywlocal.net

Where should I define the fqdn of client side to deny access from the ftp client?

  • I found reverse hostname lookup is working with /etc/hosts . I checked this by no dns requests are sent to the dns server. However, I still cannot reject requests with .ywlocal.net – Yu Watanabe Aug 11 '17 at 3:42

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