PureFTPd issue-OS _v4 denied and incorrect Group Ownership

PureftpdIt is a fast, high-quality, and fully functional ftp server. The most important thing is that it supports setting the Default Client encoding. Pureftpd is very powerful and useful, but you may encounter such problems sometimes: KERBEROS_V4 is rejected and the group ownership is incorrect. The solution is as follows!

1. As a verification method, KERBEROS_V4 is rejected

Q: The verification can run, and I can log on. However, even if it is not a chroot environment, you will receive these strange error messages during logon:

 
 

  
  
220 FTP server ready.  
  
  
 
  
  
502 Security extensions not implemented  
  
  
 
  
  
502 Security extensions not implemented  
  
  
 
  
  
KERBEROS_V4 rejected as an authentication type  
  
  
 
 
 

What does this mean?

A: This is A Linux-specific installation problem. This means that you are not using a normal command line FTP client, but using the osftp client. You may have installed the Kerberos PEM package, even though you have not used Kerberos. This information is harmless, because after an error occurs, the Kerberos client degrades to a normal FTP. If you want to disable this information when ftp is working, you must delete Kerberos from the client host.

2. Incorrect Group Ownership

Q: I have a user named "john", whose group is "johngroup ". After John uploads a file, the file belongs to John, but belongs to another group called "wheel" (John is not a member of this group). What is going on?

A: This is the standard behavior of BSD (confirmed on OpenBSD, ISOS, DragonflyBSD, And FreeBSD): when A new file is created, the group to which it belongs is inherited from the parent folder. On other systems (such as GNU/Linux), files belong to the primary group of users, unless the setgid bit of this directory is set.

If you want to make the new file uploaded to John's folder belong to the "johngroup" group, make the folder (and possibly subfolders) belong to "johngroup ":

 
 

  
  
chgrp -R johngroup /home/john  
 
 

By reading the above, you may find answers to these two questions. I hope this article will help you!

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