In bacula, it is not possible to use an FD version > DIR/SD version.
FD version must be the same or lower than the DIR/SD.
So a 9.4 FD should work ok with DIR version 11, but not the reverse.

DIR and SD version must always be the same.



Regards,
Robert Gerber
402-237-8692
[email protected]


On Fri, Feb 20, 2026 at 10:41 AM Marco Gaiarin <[email protected]>
wrote:

>
> We are currently upgrading our servers, and we have still the director (and
> SD) on bacula 9.4 (debian packages). Upgrade is in project but currently
> non
> in place.
>
> We have added some RH (OL9, precisly) clients/FD, that came with bacula 11:
> but seems that 9.4 director cannot connect to 11 client:
>
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: bnet_server.c:235-0 Accept
> socket=10.35.5.150.9102:10.7.5.41.38200 s=0x5587e2248388
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: authenticate.c:67-0 authenticate
> dir: Hello Director lnfbacula-dir calling 103
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: authenticatebase.cc:365-0 TLSPSK
> Remote need 0
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: authenticate.c:90-0 *** No FD
> compression to DIR
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: authenticatebase.cc:335-0 TLSPSK
> Local need 0
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: cram-md5.c:68-0 send: auth cram-md5
> challenge <34614955.1771603547@ven-sd-sdfs1-fd> ssl=0
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: cram-md5.c:156-0 sending resp to
> challenge: 47+lIE+rX8cdh61Ot4+yTD
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: events.c:48-0 Events: code=FC0002
> daemon=ven-sd-sdfs1-fd ref=0x7f87c400b328 type=connection
> source=lnfbacula-dir text=Director connection
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:1665-0 Instantiate
> plugin_ctx=7f87c400fb18 JobId=0
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: cdp-fd.c:369-0 Working Directory:
> /var/spool/bacula
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:250-0
> plugin_ctx=7f87c400fb18 JobId=0
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:143-0 name=<NULL>
> len=0 plugin=bpipe-fd.so plen=5
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:143-0 name=<NULL>
> len=0 plugin=cdp-fd.so plen=3
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: cdp-fd.c:410-0 Job Name: backup_job
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:250-0
> plugin_ctx=7f87c400fb18 JobId=0
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:143-0 name=<NULL>
> len=0 plugin=bpipe-fd.so plen=5
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:143-0 name=<NULL>
> len=0 plugin=cdp-fd.so plen=3
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: events.c:48-0 Events: code=FC0001
> daemon=ven-sd-sdfs1-fd ref=0x7f87c400b328 type=connection
> source=lnfbacula-dir text=Director disconnection
>  20-Feb-2026 17:05:47 ven-sd-sdfs1-fd: fd_plugins.c:1700-0 Free instance
> plugin_ctx=7f87c400fb18 JobId=0
>
> I've tried to add to client configuration:
>
>         TLS PSK Enable = no
>
> but nothing changed.
>
>
> I'm doing something wrong, or there's a 'compatibility knob' somewhere i
> can
> turn on?
>
>
> Thanks.
>
> --
>
>
>
>
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