[Samba] {Device Timeout} The I/O operation specified in %hs was not completed before the timeout period expired

[Elias Pereira]

>
> Is dns configured correctly ?

root at dc2:~# cat /etc/resolv.conf
search campus.sertao.ifrs.edu.br
nameserver 200.xxx.xxx.163 (*own IP*)

root at dc3:~# cat /etc/resolv.conf
search campus.sertao.ifrs.edu.br
nameserver 200.xxx.xxx.160 (*own IP*)

Is a firewall running and if so, are all the
> required ports open ?

We use pfsense and there's a rule allow everything between the DCs. Anyway,
I checked the logs while I was running the replicate command, and nothing
appeared in the logs.

but strangely, some ports are closed... O.o

PORT     STATE  SERVICE      VERSION
53/tcp   open   domain       (unknown banner: non3)
88/tcp   open   kerberos-sec (server time: 2024-01-03 16:19:09Z)
*123/tcp  closed ntp*
135/tcp  open   msrpc        Microsoft Windows RPC

*137/tcp  closed netbios-ns138/tcp  closed netbios-dgm*
139/tcp  open   netbios-ssn  Samba smbd 3.X - 4.X (workgroup: CAMPUS)
389/tcp  open   ldap         (Anonymous bind OK)
445/tcp  open   netbios-ssn  Samba smbd 3.X - 4.X (workgroup: CAMPUS)
464/tcp  open   kpasswd5?
636/tcp  open   ssl/ldap     (Anonymous bind OK)
3268/tcp open   ldap         (Anonymous bind OK)
3269/tcp open   ssl/ldap     (Anonymous bind OK)

Do closed ports affect replication?

On Wed, Jan 3, 2024 at 12:01 PM Rowland Penny via samba <
samba at lists.samba.org> wrote:

> On Wed, 3 Jan 2024 11:41:04 -0300
> Elias Pereira via samba <samba at lists.samba.org> wrote:
>
> > hi,
> >
> > After a "samba-tool drs showrepl" I saw that there had been an error
> > in the replication of ForestDnsZones.
> >
> > I ran a "samba-tool drs replicate dc2 dc3
> > DC=ForestDnsZones,DC=campus,DC=sertao,DC=ifrs,DC=edu,DC=br -d10" and
> > the error below occurred.
> >
> > ERROR(<class 'samba.drs_utils.drsException'>): DsReplicaSync failed -
> > drsException: DsReplicaSync failed (3221225653, '{Device Timeout} The
> > specified I/O operation on %hs was not completed before the time-out
> > period expired.')
> >   File "/usr/lib/python3/dist-packages/samba/netcmd/drs.py", line
> > 567, in run
> >     drs_utils.sendDsReplicaSync(server_bind, server_bind_handle,
> > source_dsa_guid, NC, req_options)
> >   File "/usr/lib/python3/dist-packages/samba/drs_utils.py", line 100,
> > in sendDsReplicaSync
> >     raise drsException("DsReplicaSync failed %s" % estr)
> >
> > Full -d10 on pastebin below
> > https://pastebin.com/raw/ihUSBN93
> >
> > What does this "{Device Timeout} The I/O operation specified in %hs
> > was not completed before the timeout period expired." mean?
> >
>
> It looks like there are connection problems between dc2 and dc3. Is
> dns configured correctly ? Is a firewall running and if so, are all the
> required ports open ?
>
> Rowland
>
>
>
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>


-- 
Elias Pereira