I cannot confirm the fix. Even when rpcsec_gss_krb5 *is* loaded, rpc-svcgssd.service still fails for Buster:
root@srvl064:/etc# systemctl daemon-reload root@srvl064:/etc# systemctl restart rpc-svcgssd Job for rpc-svcgssd.service failed because the control process exited with error code. See "systemctl status rpc-svcgssd.service" and "journalctl -xe" for details. root@srvl064:/etc# systemctl status rpc-svcgssd * rpc-svcgssd.service - RPC security service for NFS server Loaded: loaded (/lib/systemd/system/rpc-svcgssd.service; static; vendor preset: enabled) Active: failed (Result: exit-code) since Tue 2019-11-19 16:45:35 CET; 5s ago Process: 1809 ExecStart=/usr/sbin/rpc.svcgssd $SVCGSSDARGS (code=exited, status=1/FAILURE) Nov 19 16:45:35 srvl064.ac.aixigo.de systemd[1]: Starting RPC security service for NFS server... Nov 19 16:45:35 srvl064.ac.aixigo.de rpc.svcgssd[1810]: ERROR: GSS-API: error in gss_acquire_cred(): GSS_S_FAILURE (Unspecified GSS failure. Minor code may provide more information) - No key table entry found matching nfs/@ Nov 19 16:45:35 srvl064.ac.aixigo.de rpc.svcgssd[1810]: unable to obtain root (machine) credentials Nov 19 16:45:35 srvl064.ac.aixigo.de systemd[1]: rpc-svcgssd.service: Control process exited, code=exited, status=1/FAILURE Nov 19 16:45:35 srvl064.ac.aixigo.de rpc.svcgssd[1810]: do you have a keytab entry for nfs/<your.host>@<YOUR.REALM> in /etc/krb5.keytab? Nov 19 16:45:35 srvl064.ac.aixigo.de systemd[1]: rpc-svcgssd.service: Failed with result 'exit-code'. Nov 19 16:45:35 srvl064.ac.aixigo.de systemd[1]: Failed to start RPC security service for NFS server. root@srvl064:/etc# lsmod | grep rpcsec_gss_krb5 rpcsec_gss_krb5 45056 1 auth_rpcgss 73728 2 rpcsec_gss_krb5 sunrpc 425984 13 nfsv4,auth_rpcgss,lockd,rpcsec_gss_krb5,nfs journalctl -xe showed: ERROR: GSS-API: error in gss_acquire_cred(): GSS_S_FAILURE (Unspecified GSS failure. Minor code may provide more information) - No key table entry found matching nfs/@ Of course the nfs entry in the keytab has been omitted on purpose. Regards Harri