B<butc> S<<< [B<-port> <I<port offset>>] >>> S<<< [B<-debuglevel> (0 | 1 | 2)] >>>
S<<< [B<-cell> <I<cell name>>] >>> [B<-noautoquery>] [B<-rxbind>] [B<-localauth>]
- [B<-auditlog> <I<file | sysvmq>> [B<-audit-interface> <I<interface>>]] [B<-help>]
+ [B<-auditlog> <I<file | sysvmq>> [B<-audit-interface> <I<interface>>]]
+ [B<-allow_unauthenticated>] [B<-help>]
B<butc> S<<< [B<-p> <I<port offset>>] >>> S<<< [B<-d> (0 | 1 | 2)] >>>
S<<< [B<-c> <I<cell name>>] >>> [B<-n>] [B<-r>] [B<-l>]
- [B<-auditl> <I<file | sysvmq>> [-B<-audit-i> <I<interface>>]] [B<-h>]
+ [B<-auditl> <I<file | sysvmq>> [-B<-audit-i> <I<interface>>]]
+ [B<-al>] [B<-h>]
=for html
</div>
Specifies what audit interface to use. Defaults to C<file>. See
L<fileserver(8)> for an explanation of each interface.
+=item B<-allow_unauthenticated>
+
+By default the B<butc> requires clients performing TC_ RPCs to authenticate
+themselves, behavior introduced in the fix for OPENAFS-SA-2018-001.
+This option reverts to the historical behavior of only using the rxnull
+security class for incoming connections. Use of this option is strongly
+disrecommended; it is provided only for backwards compatibility with older
+clients in environments where B<backup> and B<butc> communicate over a secure
+network that denies access to untrusted parties.
+
=item B<-help>
Prints the online help for this command. All other valid options are