Encryption types available for Kerberos telnet in RHEL 6

How do I add available encryption types for Kerberos telnet? The only encryption types included in telnet from krb5-appl-clients are DES (which is disabled by Kerberos by default). The documentation from MIT seems to say that it will support several stronger encryption types but I didn't see a way to configure this.

Do I need to recompile telnet from the Kerberos SRPM? Why aren't stronger encryption types included in the distributed krb5-appl-client package?