Telnet Remote logon to LinuxRHEL prompts that the connection cannot be enabled on port 23. How can this problem be solved?

When remotely logging on to RHEL (RedHatEnterpriseLinux) 4 server via telnet today, the system always prompts that the connection cannot be enabled on port 23. Solution: 1. SystemSettings → SecurityLevel. Open SecurtyLevelConfiguration and check whether Telnet has been selected in FirewallOptions. If not, select. 2. Edit krb5 in/etc/xinetd. d/to remotely log on to RHEL (RedHat Enterprise Linux) 4 server via telnet today, and always prompt that the connection cannot be opened on port 23. Solution:

1. System Settings → Security Level. Enable Securty Level Configuration and check whether Telnet has been selected in Firewall Options. If not, select.

2. Edit the krb5-telnet under/etc/xinetd. d/as follows:

# Description: The authenticated telnet server accepts normal telnet sessions,
# But can also use Kerberos 5 authentication.
Service telnet
{
Flags = REUSE
Socket_type = stream
Wait = no
User = root
Server =/usr/kerberos/sbin/telnetd
Log_on_failure + = USERID
Disable = yes
}

Change disable = yes to disable = no. Save.

3. System Settings → Server Settings → Services, locate xinetd in the service list, and restart.

Use telnet to log on remotely.