Why does SSH or FTP take a long time to connect or login into the server?
Issue
- When someone connects to Red Hat Enterprise Linux server via ssh or ftp, there is long delay after entering the password before the prompt returns.
- Putty connection is very slow.
- How do I disable SSH's UseDNS function?
Environment
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- sshd
- vsftpd
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