---
name: "smbfs"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/smbfs"
---

# smbfs(4)

server message block (SMB1/CIFS) file system

## NAME

**smbfs** – server message block (SMB1/CIFS) file system

## SYNOPSIS

To compile this driver into the kernel, place the following lines in your kernel configuration file:

**option NETSMB**

Alternatively, to load the driver as a module at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
smbfs_load="YES"
```

## DESCRIPTION

The SMB driver is an implementation of the CIFS (Common Internet Filesystem) network protocol.

The **smbfs** filesystem driver supports only the obsolete SMBv1 protocol. **smbfs** has known bugs and likely has security vulnerabilities. **smbfs** and userspace counterparts [smbutil(1)](/smbutil/1.md) and [mount\_smbfs(8)](/mount_smbfs/8.md) may be removed from a future version of FreeBSD. Users are advised to evaluate the *filesystems/smbnetfs* port instead.

## SEE ALSO

[smbutil(1)](/smbutil/1.md), [mount\_smbfs(8)](/mount_smbfs/8.md)

## STANDARDS

*Common Internet File System (CIFS) Protocol*, MS-CIFS, December 2018, https://docs.microsoft.com/en-us/openspecs/windows\_protocols/ms-cifs/.

I. Heizer, P. Leach, and D. Perry, *Common Internet File System Protocol (CIFS/1.0)*, June 13, 1996, https://tools.ietf.org/html/draft-heizer-cifs-v1-spec-00.

## HISTORY

The **smbfs** device driver first appeared in FreeBSD 4.4.

## AUTHORS

The **smbfs** device driver was written by Boris Popov ⟨*bp@FreeBSD.org*⟩. The manual page was contributed by Gordon Bergling ⟨*gbe@FreeBSD.org*⟩.