From 20967627378194121bc48bf387838b8bd7682478 Mon Sep 17 00:00:00 2001
From: Jelmer Vernooij The man pages distributed with SAMBA contain
- lots of useful info that will help to get you started.
- If you don't know how to read man pages then try
- something like: $ man smbd.8Binary packages of samba are included in almost any Linux or
+ Unix distribution. There are also some packages available at
+ the samba homepage
- or
- $ nroff -man smbd.8 | more
- on older unixes. Other sources of information are pointed to
- by the Samba web site, http://www.samba.org
To do this, first run the program ./configure - in the source directory. This should automatically - configure Samba for your operating system. If you have unusual - needs then you may wish to run
Samba's configuration is stored in the smb.conf file, + that usually resides in /etc/samba/smb.conf + or /usr/local/samba/lib/smb.conf. You can either + edit this file yourself or do it using one of the many graphical + tools that are available, such as the web-based interface swat, that + is included with samba.root# ./configure --help -
There are sample configuration files in the examples + subdirectory in the distribution. I suggest you read them + carefully so you can see how the options go together in + practice. See the man page for all the options.first to see what special options you can enable. - Then executing
The simplest useful configuration file would be + something like this:root# make
[global] + workgroup = MYGROUP + + [homes] + guest ok = no + read only = no +
will create the binaries. Once it's successfully - compiled you can use
which would allow connections by anyone with an + account on the server, using either their login name or + "homes" as the service name. (Note that I also set the + workgroup that Samba is part of. See BROWSING.txt for details)root# make install
to install the binaries and manual pages. You can - separately install the binaries and/or man pages using
root# make installbin -
and
root# make installman -
Note that if you are upgrading for a previous version - of Samba you might like to know that the old versions of - the binaries will be renamed with a ".old" extension. You - can go back to the previous version with
root# make revert -
if you find this version a disaster!
At this stage you must fetch yourself a - coffee or other drink you find stimulating. Getting the rest - of the install right can sometimes be tricky, so you will - probably need it.
If you have installed samba before then you can skip - this step.
There are sample configuration files in the examples - subdirectory in the distribution. I suggest you read them - carefully so you can see how the options go together in - practice. See the man page for all the options.
The simplest useful configuration file would be - something like this:
[global] - workgroup = MYGROUP - - [homes] - guest ok = no - read only = no -
which would allow connections by anyone with an - account on the server, using either their login name or - "homes" as the service name. (Note that I also set the - workgroup that Samba is part of. See BROWSING.txt for details)
Note that Note that make install will not install a
For more information about security settings for the [homes] share please refer to the document UNIX_SECURITY.txt.
SWAT is a web-based interface that helps you configure samba. + SWAT might not be available in the samba package on your platform, + but in a seperate package. Please read the swat manpage + on compiling, installing and configuring swat from source. +
To launch SWAT just run your favorite web browser and + point it at "http://localhost:901/". Replace localhost with the name of the computer you are running samba on if you + are running samba on a different computer then your browser.
Note that you can attach to SWAT from any IP connected + machine but connecting from a remote machine leaves your + connection open to password sniffing as passwords will be sent + in the clear over the wire.
You must choose to start smbd and nmbd either - as daemons or from inetd. Don't try - to do both! Either you can put them in inetd.conf and have them started on demand - by inetd, or you can start them as - daemons either from the command line or in /etc/rc.local. See the man pages for details - on the command line options. Take particular care to read - the bit about what user you need to be in order to start - Samba. In many cases you must be root.
$ smbclient -L + yourhostnameThe main advantage of starting smbd - and You should get back a list of shares available on + your server. If you don't then something is incorrectly setup. + Note that this method can also be used to see what shares + are available on other LanManager clients (such as WfWg).
If you choose user level security then you may find + that Samba requests a password before it will list the shares. + See the nmbd using the recommended daemon method - is that they will respond slightly more quickly to an initial connection - request.
smbclient man page for details. (you + can force it to list the shares without a password by + adding the option -U% to the command line. This will not work + with non-Samba servers)NOTE; The following will be different if - you use NIS or NIS+ to distributed services maps.
$ smbclient //yourhostname/aserviceLook at your Typically the yourhostname + would be the name of the host where you installed smbd. The aservice is + any service you have defined in the /etc/services. - What is defined at port 139/tcp. If nothing is defined - then add a line like this:
smb.conf + file. Try your user name if you just have a [homes] section + in smb.conf.For example if your unix host is bambi and your login + name is fred you would type:
$ netbios-ssn 139/tcpsmbclient //bambi/fred +
similarly for 137/udp you should have an entry like:
Try mounting disks. eg:C:\WINDOWS\> netbios-ns 137/udpnet use d: \\servername\service +
Next edit your /etc/inetd.conf - and add two lines something like this:
Try printing. eg:netbios-ssn stream tcp nowait root /usr/local/samba/bin/smbd smbd - netbios-ns dgram udp wait root /usr/local/samba/bin/nmbd nmbd -C:\WINDOWS\> net use lpt1: + \\servername\spoolservice
The exact syntax of /etc/inetd.conf - varies between unixes. Look at the other entries in inetd.conf - for a guide.
C:\WINDOWS\> print filename +NOTE: Some unixes already have entries like netbios_ns - (note the underscore) in /etc/services. - You must either edit /etc/services or - /etc/inetd.conf to make them consistent.
Celebrate, or send me a bug report!NOTE: On many systems you may need to use the - "interfaces" option in smb.conf to specify the IP address - and netmask of your interfaces. Run ifconfig - as root if you don't know what the broadcast is for your - net. nmbd tries to determine it at run - time, but fails on some unixes. See the section on "testing nmbd" - for a method of finding if you need to do this.
Then you might read the file HOWTO chapter Diagnosis and the + FAQ. If you are still stuck then try the mailing list or + newsgroup (look in the README for details). Samba has been + successfully installed at thousands of sites worldwide, so maybe + someone else has hit your problem and has overcome it. You could + also use the WWW site to scan back issues of the samba-digest.!!!WARNING!!! Many unixes only accept around 5 - parameters on the command line in inetd.conf. - This means you shouldn't use spaces between the options and - arguments, or you should use a script, and start the script - from inetd.
When you fix the problem please send some + updates of the documentation (or source code) to one of + the documentation maintainers or the list. +Restart inetd, perhaps just send - it a HUP. If you have installed an earlier version of nmbd then you may need to kill nmbd as well.
By default Samba uses a blank scope ID. This means + all your windows boxes must also have a blank scope ID. + If you really want to use a non-blank scope ID then you will + need to use the 'netbios scope' smb.conf option. + All your PCs will need to have the same setting for + this to work. I do not recommend scope IDs.To start the server as a daemon you should create - a script something like this one, perhaps calling - it startsmb.
One area which sometimes causes trouble is locking.#!/bin/sh - /usr/local/samba/bin/smbd -D - /usr/local/samba/bin/nmbd -D -There are two types of locking which need to be + performed by a SMB server. The first is "record locking" + which allows a client to lock a range of bytes in a open file. + The second is the "deny modes" that are specified when a file + is open.
then make it executable with chmod - +x startsmb
Record locking semantics under Unix is very + different from record locking under Windows. Versions + of Samba before 2.2 have tried to use the native + fcntl() unix system call to implement proper record + locking between different Samba clients. This can not + be fully correct due to several reasons. The simplest + is the fact that a Windows client is allowed to lock a + byte range up to 2^32 or 2^64, depending on the client + OS. The unix locking only supports byte ranges up to + 2^31. So it is not possible to correctly satisfy a + lock request above 2^31. There are many more + differences, too many to be listed here.You can then run startsmb by - hand or execute it from /etc/rc.local -
Samba 2.2 and above implements record locking + completely independent of the underlying unix + system. If a byte range lock that the client requests + happens to fall into the range 0-2^31, Samba hands + this request down to the Unix system. All other locks + can not be seen by unix anyway.To kill it send a kill signal to the processes - nmbd and smbd.
Strictly a SMB server should check for locks before + every read and write call on a file. Unfortunately with the + way fcntl() works this can be slow and may overstress the + rpc.lockd. It is also almost always unnecessary as clients + are supposed to independently make locking calls before reads + and writes anyway if locking is important to them. By default + Samba only makes locking calls when explicitly asked + to by a client, but if you set "strict locking = yes" then it will + make lock checking calls on every read and write.NOTE: If you use the SVR4 style init system then - you may like to look at the examples/svr4-startup - script to make Samba fit into that system.
You can also disable by range locking completely + using "locking = no". This is useful for those shares that + don't support locking or don't need it (such as cdroms). In + this case Samba fakes the return codes of locking calls to + tell clients that everything is OK.The second class of locking is the "deny modes". These + are set by an application when it opens a file to determine + what types of access should be allowed simultaneously with + its open. A client may ask for DENY_NONE, DENY_READ, DENY_WRITE + or DENY_ALL. There are also special compatibility modes called + DENY_FCB and DENY_DOS.
$ smbclient -L - yourhostname
Chapter 2. Quick Cross Subnet Browsing / Cross Workgroup Browsing guideYou should get back a list of shares available on - your server. If you don't then something is incorrectly setup. - Note that this method can also be used to see what shares - are available on other LanManager clients (such as WfWg).
This document should be read in conjunction with Browsing and may +be taken as the fast track guide to implementing browsing across subnets +and / or across workgroups (or domains). WINS is the best tool for resolution +of NetBIOS names to IP addesses. WINS is NOT involved in browse list handling +except by way of name to address mapping.If you choose user level security then you may find - that Samba requests a password before it will list the shares. - See the smbclient man page for details. (you - can force it to list the shares without a password by - adding the option -U% to the command line. This will not work - with non-Samba servers)
$ smbclient //yourhostname/aservice
Firstly, all MS Windows networking is based on SMB (Server Message +Block) based messaging. SMB messaging may be implemented using NetBIOS or +without NetBIOS. Samba implements NetBIOS by encapsulating it over TCP/IP. +MS Windows products can do likewise. NetBIOS based networking uses broadcast +messaging to affect browse list management. When running NetBIOS over +TCP/IP this uses UDP based messaging. UDP messages can be broadcast or unicast.Typically the yourhostname - would be the name of the host where you installed smbd. The aservice is - any service you have defined in the smb.conf - file. Try your user name if you just have a [homes] section - in smb.conf.
Normally, only unicast UDP messaging can be forwarded by routers. The +"remote announce" parameter to smb.conf helps to project browse announcements +to remote network segments via unicast UDP. Similarly, the "remote browse sync" +parameter of smb.conf implements browse list collation using unicast UDP.For example if your unix host is bambi and your login - name is fred you would type:
Secondly, in those networks where Samba is the only SMB server technology +wherever possible nmbd should be configured on one (1) machine as the WINS +server. This makes it easy to manage the browsing environment. If each network +segment is configured with it's own Samba WINS server, then the only way to +get cross segment browsing to work is by using the "remote announce" and +the "remote browse sync" parameters to your smb.conf file.$ smbclient //bambi/fred -
If only one WINS server is used for an entire multi-segment network then +the use of the "remote announce" and the "remote browse sync" parameters +should NOT be necessary.As of Samba-3 WINS replication is being worked on. The bulk of the code has +been committed, but it still needs maturation.
Right now samba WINS does not support MS-WINS replication. This means that +when setting up Samba as a WINS server there must only be one nmbd configured +as a WINS server on the network. Some sites have used multiple Samba WINS +servers for redundancy (one server per subnet) and then used "remote browse +sync" and "remote announce" to affect browse list collation across all +segments. Note that this means clients will only resolve local names, +and must be configured to use DNS to resolve names on other subnets in +order to resolve the IP addresses of the servers they can see on other +subnets. This setup is not recommended, but is mentioned as a practical +consideration (ie: an 'if all else fails' scenario).
Lastly, take note that browse lists are a collection of unreliable broadcast +messages that are repeated at intervals of not more than 15 minutes. This means +that it will take time to establish a browse list and it can take up to 45 +minutes to stabilise, particularly across network segments.
Try mounting disks. eg:
C:\WINDOWS\> net use d: \\servername\service -
Try printing. eg:
C:\WINDOWS\> net use lpt1: - \\servername\spoolservice
C:\WINDOWS\> print filename -
Celebrate, or send me a bug report!
If nothing works and you start to think "who wrote - this pile of trash" then I suggest you do step 2 again (and - again) till you calm down.
Then you might read the file DIAGNOSIS.txt and the - FAQ. If you are still stuck then try the mailing list or - newsgroup (look in the README for details). Samba has been - successfully installed at thousands of sites worldwide, so maybe - someone else has hit your problem and has overcome it. You could - also use the WWW site to scan back issues of the samba-digest.
When you fix the problem PLEASE send me some updates to the - documentation (or source code) so that the next person will find it - easier.
If you have installation problems then go to the - Diagnosis chapter to try to find the - problem.
By default Samba uses a blank scope ID. This means - all your windows boxes must also have a blank scope ID. - If you really want to use a non-blank scope ID then you will - need to use the 'netbios scope' smb.conf option. - All your PCs will need to have the same setting for - this to work. I do not recommend scope IDs.
The SMB protocol has many dialects. Currently - Samba supports 5, called CORE, COREPLUS, LANMAN1, - LANMAN2 and NT1.
You can choose what maximum protocol to support - in the smb.conf file. The default is - NT1 and that is the best for the vast majority of sites.
In older versions of Samba you may have found it - necessary to use COREPLUS. The limitations that led to - this have mostly been fixed. It is now less likely that you - will want to use less than LANMAN1. The only remaining advantage - of COREPLUS is that for some obscure reason WfWg preserves - the case of passwords in this protocol, whereas under LANMAN1, - LANMAN2 or NT1 it uppercases all passwords before sending them, - forcing you to use the "password level=" option in some cases.
The main advantage of LANMAN2 and NT1 is support for - long filenames with some clients (eg: smbclient, Windows NT - or Win95).
See the smb.conf(5) manual page for more details.
Note: To support print queue reporting you may find - that you have to use TCP/IP as the default protocol under - WfWg. For some reason if you leave Netbeui as the default - it may break the print queue reporting on some systems. - It is presumably a WfWg bug.
To use a printer that is available via a smb-based - server from a unix host with LPR you will need to compile the - smbclient program. You then need to install the script - "smbprint". Read the instruction in smbprint for more details. -
There is also a SYSV style script that does much - the same thing called smbprint.sysv. It contains instructions.
See the CUPS manual for information about setting up - printing from a unix host with CUPS to a smb-based server.
One area which sometimes causes trouble is locking.
There are two types of locking which need to be - performed by a SMB server. The first is "record locking" - which allows a client to lock a range of bytes in a open file. - The second is the "deny modes" that are specified when a file - is open.
Record locking semantics under Unix is very - different from record locking under Windows. Versions - of Samba before 2.2 have tried to use the native - fcntl() unix system call to implement proper record - locking between different Samba clients. This can not - be fully correct due to several reasons. The simplest - is the fact that a Windows client is allowed to lock a - byte range up to 2^32 or 2^64, depending on the client - OS. The unix locking only supports byte ranges up to - 2^31. So it is not possible to correctly satisfy a - lock request above 2^31. There are many more - differences, too many to be listed here.
Samba 2.2 and above implements record locking - completely independent of the underlying unix - system. If a byte range lock that the client requests - happens to fall into the range 0-2^31, Samba hands - this request down to the Unix system. All other locks - can not be seen by unix anyway.
Strictly a SMB server should check for locks before - every read and write call on a file. Unfortunately with the - way fcntl() works this can be slow and may overstress the - rpc.lockd. It is also almost always unnecessary as clients - are supposed to independently make locking calls before reads - and writes anyway if locking is important to them. By default - Samba only makes locking calls when explicitly asked - to by a client, but if you set "strict locking = yes" then it will - make lock checking calls on every read and write.
You can also disable by range locking completely - using "locking = no". This is useful for those shares that - don't support locking or don't need it (such as cdroms). In - this case Samba fakes the return codes of locking calls to - tell clients that everything is OK.
The second class of locking is the "deny modes". These - are set by an application when it opens a file to determine - what types of access should be allowed simultaneously with - its open. A client may ask for DENY_NONE, DENY_READ, DENY_WRITE - or DENY_ALL. There are also special compatibility modes called - DENY_FCB and DENY_DOS.
This document should be read in conjunction with Browsing and may -be taken as the fast track guide to implementing browsing across subnets -and / or across workgroups (or domains). WINS is the best tool for resolution -of NetBIOS names to IP addesses. WINS is NOT involved in browse list handling -except by way of name to address mapping.
Firstly, all MS Windows networking is based on SMB (Server Message -Block) based messaging. SMB messaging is implemented using NetBIOS. Samba -implements NetBIOS by encapsulating it over TCP/IP. MS Windows products can -do likewise. NetBIOS based networking uses broadcast messaging to affect -browse list management. When running NetBIOS over TCP/IP this uses UDP -based messaging. UDP messages can be broadcast or unicast.
Normally, only unicast UDP messaging can be forwarded by routers. The -"remote announce" parameter to smb.conf helps to project browse announcements -to remote network segments via unicast UDP. Similarly, the "remote browse sync" -parameter of smb.conf implements browse list collation using unicast UDP.
Secondly, in those networks where Samba is the only SMB server technology -wherever possible nmbd should be configured on one (1) machine as the WINS -server. This makes it easy to manage the browsing environment. If each network -segment is configured with it's own Samba WINS server, then the only way to -get cross segment browsing to work is by using the "remote announce" and -the "remote browse sync" parameters to your smb.conf file.
If only one WINS server is used then the use of the "remote announce" and the -"remote browse sync" parameters should NOT be necessary.
Samba WINS does not support MS-WINS replication. This means that when setting up -Samba as a WINS server there must only be one nmbd configured as a WINS server -on the network. Some sites have used multiple Samba WINS servers for redundancy -(one server per subnet) and then used "remote browse sync" and "remote announce" -to affect browse list collation across all segments. Note that this means -clients will only resolve local names, and must be configured to use DNS to -resolve names on other subnets in order to resolve the IP addresses of the -servers they can see on other subnets. This setup is not recommended, but is -mentioned as a practical consideration (ie: an 'if all else fails' scenario).
Lastly, take note that browse lists are a collection of unreliable broadcast -messages that are repeated at intervals of not more than 15 minutes. This means -that it will take time to establish a browse list and it can take up to 45 -minutes to stabilise, particularly across network segments.
The "remote announce" parameter of smb.conf can be used to forcibly ensure that all the NetBIOS names on a network get announced to a remote network. @@ -2225,9 +1821,9 @@ CLASS="SECT1" >
The "remote browse sync" parameter of smb.conf is used to announce to another LMB that it must synchronise it's NetBIOS name list with our @@ -2248,9 +1844,9 @@ CLASS="SECT1" >
Use of WINS (either Samba WINS _or_ MS Windows NT Server WINS) is highly recommended. Every NetBIOS machine registers it's name together with a @@ -2302,22 +1898,23 @@ CLASS="emphasis" CLASS="EMPHASIS" >DO NOT EVER use both "wins support = yes" together with "wins server = a.b.c.d" -particularly not using it's own IP address.
use both "wins support = yes" together +with "wins server = a.b.c.d" particularly not using it's own IP address. +Specifying both will cause nmbd to refuse to start!A very common cause of browsing problems results from installing more than one protocol on an MS Windows machine.
Every NetBIOS machine take part in a process of electing the LMB (and DMB) +>Every NetBIOS machine takes part in a process of electing the LMB (and DMB) every 15 minutes. A set of election criteria is used to determine the order of precidence for winning this election process. A machine running Samba or Windows NT will be biased so that the most suitable machine will predictably @@ -2333,6 +1930,19 @@ interface over the IPX protocol. Samba will then lose the LMB role as Windows as an LMB and thus browse list operation on all TCP/IP only machines will fail.
Windows 95, 98, 98se, Me are referred to generically as Windows 9x. +The Windows NT4, 2000, XP and 2003 use common protocols. These are roughly +referred to as the WinNT family, but it should be recognised that 2000 and +XP/2003 introduce new protocol extensions that cause them to behave +differently from MS Windows NT4. Generally, where a server does NOT support +the newer or extended protocol, these will fall back to the NT4 protocols.
The safest rule of all to follow it this - USE ONLY ONE PROTOCOL!
Resolution of NetBIOS names to IP addresses can take place using a number of methods. The only ones that can provide NetBIOS name_type information @@ -2431,9 +2041,9 @@ CLASS="SECT1" >
Old windows clients send plain text passwords over the wire. Samba can check these passwords by crypting them and comparing them @@ -2472,9 +2082,9 @@ CLASS="SECT1" >
The unix and SMB password encryption techniques seem similar on the surface. This similarity is, however, only skin deep. The unix @@ -2580,9 +2190,9 @@ CLASS="SECT2" >