diff options
Diffstat (limited to 'fs/cifs/README')
| -rw-r--r-- | fs/cifs/README | 39 |
1 files changed, 32 insertions, 7 deletions
diff --git a/fs/cifs/README b/fs/cifs/README index 0355003f4f0..7986d0d97ac 100644 --- a/fs/cifs/README +++ b/fs/cifs/README @@ -443,7 +443,10 @@ A partial list of the supported mount options follows: SFU does). In the future the bottom 9 bits of the mode mode also will be emulated using queries of the security descriptor (ACL). -sec Security mode. Allowed values are: + sign Must use packet signing (helps avoid unwanted data modification + by intermediate systems in the route). Note that signing + does not work with lanman or plaintext authentication. + sec Security mode. Allowed values are: none attempt to connection as a null user (no name) krb5 Use Kerberos version 5 authentication krb5i Use Kerberos authentication and packet signing @@ -453,6 +456,8 @@ sec Security mode. Allowed values are: server requires signing also can be the default) ntlmv2 Use NTLMv2 password hashing ntlmv2i Use NTLMv2 password hashing with packet signing + lanman (if configured in kernel config) use older + lanman hash The mount.cifs mount helper also accepts a few mount options before -o including: @@ -485,14 +490,34 @@ PacketSigningEnabled If set to one, cifs packet signing is enabled it. If set to two, cifs packet signing is required even if the server considers packet signing optional. (default 1) +SecurityFlags Flags which control security negotiation and + also packet signing. Authentication (may/must) + flags (e.g. for NTLM and/or NTLMv2) may be combined with + the signing flags. Specifying two different password + hashing mechanisms (as "must use") on the other hand + does not make much sense. Default flags are + 0x07007 + (NTLM, NTLMv2 and packet signing allowed). Maximum + allowable flags if you want to allow mounts to servers + using weaker password hashes is 0x37037 (lanman, + plaintext, ntlm, ntlmv2, signing allowed): + + may use packet signing 0x00001 + must use packet signing 0x01001 + may use NTLM (most common password hash) 0x00002 + must use NTLM 0x02002 + may use NTLMv2 0x00004 + must use NTLMv2 0x04004 + may use Kerberos security (not implemented yet) 0x00008 + must use Kerberos (not implemented yet) 0x08008 + may use lanman (weak) password hash 0x00010 + must use lanman password hash 0x10010 + may use plaintext passwords 0x00020 + must use plaintext passwords 0x20020 + (reserved for future packet encryption) 0x00040 + cifsFYI If set to one, additional debug information is logged to the system error log. (default 0) -ExtendedSecurity If set to one, SPNEGO session establishment - is allowed which enables more advanced - secure CIFS session establishment (default 0) -NTLMV2Enabled If set to one, more secure password hashes - are used when the server supports them and - when kerberos is not negotiated (default 0) traceSMB If set to one, debug information is logged to the system error log with the start of smb requests and responses (default 0) |