sudo mount -t cifs -o username=[Username],password=[Password],uid=1000,gid=1000 // /mnt/NetworkBackup

    error(112): Host is down

sudo smbclient -N -L //
do_connect: Connection to failed (Error NT_STATUS_IO_TIMEOUT)

Could anyone suggest to me how to solve this error? Pls let me know if I need to update the question.

  • There seems to be a problem with your windows computer. Or maybe a general problem with the network connectivity. Doesn't seem to be Pi specific.
    – Dirk
    Commented Oct 7, 2022 at 11:24
  • general linux questions do not belong here ... same for windows questions
    – jsotola
    Commented Oct 7, 2022 at 17:48
  • The error message you posted says, Host is down. At the risk of insulting your intelligence, I'll ask why you didn't bother to mention what you did to eliminate one apparently obvious issue; i.e. is your host up???
    – Seamus
    Commented Oct 10, 2022 at 1:19
  • @Seamus Yes Seamus, the host is up. That's why.
    – MyatKaung
    Commented Oct 10, 2022 at 2:13
  • OK - mount can be picky, so let's try a few steps to troubleshoot. Run apt-cache policy cifs-utils to verify you have cifs-utils installed & get the version. If you do, try using smbfs instead of cifs.
    – Seamus
    Commented Oct 10, 2022 at 6:37

2 Answers 2


"Host is down" error is caused by a combination of two things: A SMB protocol version mismatch, and the CIFS client on Linux returning a misleading error message. In order to fix this a version entry needs to be added to the mount command. By default Raspberry Pi OS will only use versions 2.1 and above, which are compatible with Windows 7 and later. Older devices, including some NAS, may require version 1.0:


Actually, it is just that port 445(SMB port) is not open earlier, so that I cannot mount. Make sure this port is open before mounting winshare folder on Pi.

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