# Telnet Server FTP warning messages 500 'AUTH GSSAPI' how to resolve??

**URL:** <https://community.unix.com/t/telnet-server-ftp-warning-messages-500-auth-gssapi-how-to-resolve/163155>\
**Category:** UNIX for Dummies Questions & Answers\
**Created:** [July 10, 2006, 6:04am UTC](https://community.unix.com/t/telnet-server-ftp-warning-messages-500-auth-gssapi-how-to-resolve/163155 "2006-07-10T06:04:21Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![csviking](https://community.unix.com/letter_avatar/csviking/32/5_5575768a8748004e209b776fc1b2916d.png) [@csviking](https://community.unix.com/u/csviking)\
**Post date:** [July 10, 2006, 6:04am UTC](https://community.unix.com/t/telnet-server-ftp-warning-messages-500-auth-gssapi-how-to-resolve/163155/1 "2006-07-10T06:04:21Z")

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These are the warning messages I am getting but the FTP works fine.How do I get rid of these?

220 FTP server (SunOS 5.8) ready.

500 'AUTH GSSAPI': command not understood.  
500 'AUTH KERBEROS\_V4': command not understood.  
KERBEROS\_V4 rejected as an authentication type