DB Variables Configuration

Database variables

SME Server comes with the most used parameters set as variables in its internal configuration databases. These variables are used to store values to be used in the final configuration files. Please, read the SME Server Developer's Guide to understand the template and database process.

These variables are useful to configure your system more easily, as you do not need to modify configuration files directly for most common cases. It also makes it possible to administer the server through its server-manager as the database variables are used to set and change configuration parameters. After editing, the configuration files must be regenerated and affected services need to be restarted.

For example, suppose you need to increase "memory-limit" in php.

You would simply execute these commands at the server console:

db configuration setprop php MemoryLimit 64M
expand-template /etc/php.ini
/etc/init.d/httpd-e-smith restart

The first line changes the value for the memory limit of PHP, the second line regenerates the configuration file and the last line will reload Apache (and subsequently also PHP as this is configured as a module of Apache).

	Warning:
	Database parameters are case sensitive so take great care when typing at the server shell because no error messages are given should you make a typo.

The database system is based on a flat file system, but you should never edit them directly. Instead you should use the db command. More details on using the database system can be found in the SME Server Developer's Guide.

Setting db variables to default values

Any db variable that has a default value can be reset to the default by deleting the variable entirely, then re-initializing the default database values as follows:

config delprop key prop
/etc/e-smith/events/actions/initialize-default-databases

Concept of the signal-event command

Thanks for the developers work, you can simplify more the commands using the signal-event proccess.

Again, for more details see SME Server Developer's Guide

Overview of database variables

The next section describes the standard variables defined on SME Server. Please update this list with new standard variables in future SME Server versions.

The tables below have three columns. The first is the variable, the second is the target variable (located in the final configuration file), and the third is the default value.

A lot of the variables can be set using the server-manager but some can not. For example the variable DomainMaster for samba is not important here, because this can be set through server-manager. On the other hand, the variable RecycleBin is important, because it is not accessible through the server-manager.

Configuration files may use database values from a single configuration key, or may use multiple keys. The latter is the case for the /etc/rc.d/init.d/masq configuration file. This file takes it values from multiple database keys such as squid and masq.

It is also possible that multiple configuration files use the same key. An example of this is the httpd-admin key. This key has a variable TCPPort which is used in multiple files (/etc/httpd/admin-conf/httpd.conf and /etc/services).

AppleTalk (atalk)

Usage

db configuration setprop atalk variable value
signal-event workgroup-update

Affected file: /etc/atalk/netatalk.conf

Variable	Target	Default
MaxClients	AFPD_MAX_CLIENTS	20

Console Mode

Usage - Choose either login or auto DB variable.

config set ConsoleMode login
signal-event post-upgrade
signal-event reboot

Variable	Target	Default
ConsoleMode	Console Setting	login

Clam AntiVirus (clamav)

Usage

db configuration setprop clamav variable value
signal-event clamav-update

Affected file: /etc/clamav.conf

Variable	Target	Default
ArchiveBlockEncrypted	ArchiveBlockEncrypted	no
ArchiveBlockMax	ArchiveBlockMax	no
ArchiveMaxCompressionRatio	ArchiveMaxCompressionRatio	300
ArchiveMaxFiles	ArchiveMaxFiles	1500
ArchiveMaxFileSize	ArchiveMaxFileSize	15M
ArchiveMaxRecursion	ArchiveMaxRecursion	8
Debug	Debug	no
DetectBrokenExecutables	DetectBrokenExecutables	no
IdleTimeout	IdleTimeout	60
LeaveTemporaryFiles	LeaveTemporaryFiles	no
LogClean	LogClean	yes
LogTime	LogTime	yes
LogVerbose	LogVerbose	yes
MaxConnectionQueueLength	MaxConnectionQueueLength	30
MaxDirectoryRecursion	MaxDirectoryRecursion	20
MaxThreads	MaxThreads	20
ReadTimeout	ReadTimeout	300
ScanArchive	ScanArchive	yes
ScanHTML	ScanHTML	yes
ScanMail	ScanMail	yes
ScanOLE2	ScanOLE2	yes
ScanPE	ScanPE	yes
SelfCheck	SelfCheck	1800
StreamMaxLength	StreamMaxLength	25M

Affected file: /etc/freshclam.conf

Variable	Target	Default
Checks	Checks	24
DatabaseMirror	DatabaseMirror	db.local.clamav.net
DNSDatabaseInfo	DNSDatabaseInfo	current.cvd.clamav.net
LogVerbose	LogVerbose	yes
MaxAttempts	MaxAttempts	6

Affected file: /var/service/clamd/env/MEMLIMIT

Variable	Target	Default
MemLimit	MEMLIMIT	80000000

DHCP daemon (dhcpd)

Usage

db configuration setprop dhcpd variable value
signal-event remoteaccess-update

Affected file: /etc/dhcpd.conf

Variable	Target	Default
Bootp	bootp	deny

DNS Cache Forwarder (dnscache.forwarder)

Usage

db configuration setprop dnscache variable value
signal-event dns-update

Affected file: /var/service/dnscache.forwarder/config

Variable	Target	Default
CacheSize	CACHESIZE	1000000
DataLimit	DATALIMIT	3000000

FlexBackup

Usage

db configuration setprop flexbackup variable value
signal-event conf-backup

Affected file: /etc/flexbackup.conf

Variable	Target	Default
Blocksize	$blksize	32
TapeBlocksize	$mt_blksize	0
BufferProg	$buffer	buffer
BufferMegs	$buffer_megs	20
erase_rewind_only	$erase_rewind_only	false
Type	$type	tar

Horde (webmail)

Usage

db configuration setprop horde variable value

expand-template /home/httpd/html/horde/conf.menu.aps.php

Affected file: /home/httpd/html/horde/conf.menu.aps.php

Variable	Target	Default
MenuArray	MenuArray	enabled

expand-template /home/httpd/html/horde/config/conf.php

Affected file: /home/httpd/html/horde/config/conf.php

Variable	Target	Default
Administration	Administration	disabled

expand-template /home/httpd/html/horde/turba/config/sources.php

Affected file: /home/httpd/html/horde/turba/config/sources.php

Variable	Target	Default
freebusy	freebusy	disabled
SharedAddressBooks	SharedAddressBooks	disabled

Apache server ibay specific (httpd-e-smith)

Usage

db accounts setprop ibayname variable value
signal-event ibay-modify ibayname

Affected file: /etc/httpd/conf/httpd.conf

Variable	Target	Default
AllowOverride	AllowOverride	None
FollowSymLinks	FollowSymLinks	disabled
Indexes	Indexes	enabled
PHPRegisterGlobals	register_globals	disabled
PHPBaseDir	open_basedir	/home/e-smith/files/ibays/ibayname

Apache server-manager (httpd-admin)

Usage

db configuration setprop httpd-admin variable value
signal-event remoteaccess-update

Affected file: /etc/httpd/admin-conf/httpd.conf and /etc/services

Variable	Target	Default
TCPPort	TCPPort	980

IMAP (imap)

Usage

db configuration setprop imap variable value
signal-event email-update

Affected file: /var/service/imap/config

Variable	Target	Default
ConcurrencyLimit	INSTANCES	2000
ConcurrencyLimitPerIP	INSTANCES_PER_IP	12
ProcessMemoryLimit	ulimitdata	128000000

IMAPS (imaps)

Usage

db configuration setprop imaps variable value
signal-event email-update

Affected file: /var/service/imaps/config

Variable	Target	Default
ConcurrencyLimit	INSTANCES	2000
ConcurrencyLimitPerIP	INSTANCES_PER_IP	12
ProcessMemoryLimit	ulimitdata	128000000

IPTables firewall (masq)

Usage

db configuration setprop masq variable value
signal-event remoteaccess-update

Affected file: /etc/rc.d/init.d/masq

Variable	Target	Default
Logging	Logging	most
Stealth	Stealth	no

	Tip:
	Special case is TCPPort and UDPPort from any DB key. Any Db key named "TCPPort" or "UDPPort" affect masq file. Currently the following keys are included in masq: TCPPort: httpd-admin - sshd - smtpd - ssmtpd

Additional information on customizing iptables

Create a custom-named service definition in the configuration database.

db configuration set <servicename> service

Apply your desired firewall restrictions to any existing SME 'service' or to a custom-named service that you have created. Combine a custom-named service with port-forwarding to create customized firewall rules.

db configuration setprop <servicename> TCPPort <portnumber>
db configuration setprop <servicename> UDPPort <portnumber>
db configuration setprop <servicename> status enabled|disabled
db configuration setprop <servicename> access public|private
db configuration setprop <servicename> AllowHosts a.b.c.d,x.y.z.0/24
db configuration setprop <servicename> DenyHosts e.f.g.h,l.m.n.0/24

Effectuate the changes you have made

signal-event remoteaccess-update

Affected file: /etc/rc.d/init.d/masq

Variable	Target	Default
TCPPort	--proto tcp --dport <Ports>	Pre-configured for default services; no default for custom services
UDPPort	--proto udp --dport <Ports>	Pre-configured for default services; no default for custom services
status	disabled	AllowHosts is set to "" (an empty string) unless the status is 'enabled'
access	private	AllowHosts is set to "" (an empty string) unless access is 'public'
AllowHosts	--src ..... --jump ACCEPT	Pre-configured for default services; no default for custom services. Default is '0.0.0.0/0' if service is enabled and public.
DenyHosts	--src ..... --jump denylog	Pre-configured for default services; no default for custom services. If 'DenyHosts' is empty or does not exist then there are no '... --jump denylog' entries created in /etc/init.d/masq.

SpamAssasin

Usage

db configuration setprop spamassassin variable value
signal-event email-update

Affected file: /etc/mail/spamassassin/local.cf

Variable	Target	Default
DNSAvailable	dns_available	yes
OkLanguages	ok_languages	all
OkLocales	ok_locales	all
ReportSafe	report_safe	0
Subject	rewrite_header Subject	[SPAM]
SkipRBLChecks	skip_rbl_checks	0
TrustedNetworks	trusted_networks	127.
UseAutoWhitelist	use_auto_whitelist	0
UseBayes	use_bayes	0
Sensitivity	required_hits	medium

MySQL (mysqld)

Usage

db configuration setprop mysqld variable value
expand-template /etc/my.cnf
/etc/rc.d/init.d/mysqld restart

Affected file: /etc/my.cnf

Variable	Target	Default
InnoDB	InnoDB	disabled
LocalNetworkingOnly	LocalNetworkingOnly	yes

Network Time Protocol (ntpd)

Usage

db configuration setprop ntpd variable value
signal-event timeserver-update

Affected file: /var/service/ntpd/env/MEMLIMIT

Variable	Target	Default
MemLimit	MEMLIMIT	12000000

Affected file: /etc/ntp/step-tickers and /etc/ntp.conf

Variable	Target	Default
NTPServer	server	pool.ntp.org
SyncToHWClockSupported	SyncToHWClockSupported	yes

Php

Usage

db configuration setprop php variable value
expand-template /etc/php.ini
/etc/init.d/httpd-e-smith restart

Affected file: /etc/php.ini

Variable	Target	Default
MaxExecutionTime	max_execution_time	30
MemoryLimit	memory_limit	32M
PostMaxSize	post_max_size	20M
UploadMaxFilesize	upload_max_filesize	10M
AllowUrlFopen	allow_url_fopen	Off

Don't forget "M" unit because you get a lot of httpd errors and apache can't start!

Virtual Private Network (VPN) (pptpd)

Usage

db configuration setprop pptpd variable value
signal-event remoteaccess-update

Affected file: /etc/ppp/options.pptpd

Variable	Target	Default
debug	debug	no
Passive	passive	enabled

Affected file: /etc/pptpd.conf

Variable	Target	Default
debug	debug	no

Pro FTP (proftpd)

Usage

db configuration setprop ftp variable value
signal-event remoteaccess-update

Affected file: /etc/proftpd.conf

Variable	Target	Default
DisableAnonymous	DisableAnonymous	no

Samba (smbd)

Usage

The following are global changes:

db configuration setprop smb variable value
signal-event ibay-modify 

Affected file: /etc/samba/smb.conf

Variable	Target	Default
RecycleBin	recycle	disabled
ShadowCopy	shadow_copy	disabled
DeadTime	deadtime	10080
DisplayCharSet	display charset	ISO8859-1
DosCharSet	dos charset	850
LogonDrive	logon drive	Z
OpLocks	oplocks	enabled
OsLevel	os level	65
ServerString	server string	SME Server
SMBPorts	smb ports	139
UnixCharSet	unix charset	UTF8
UseClientDriver	use client driver	yes

Usage

The following are per ibay changes:

db accounts setprop ibay_name variable value
signal-event ibay-modify 

Affected file: /etc/samba/smb.conf

Variable	Target	Default
Browesable	browseable	enabled

Squid Proxy (squid)

Usage

db configuration setprop squid variable value
signal-event proxy-update

Affected file: /etc/squid/squid.conf

Variable	Target	Default
SafePorts	acl Safe_ports port	80
EnforceSafePorts	EnforceSafePorts	no

Affected file: /etc/squid/squid.conf and /etc/rc.d/init.d/masq

Variable	Target	Default
Transparent	Transparent	yes

Affected file: /etc/rc.d/init.d/masq

Variable	Target	Default
TransparentPort	TransparentPort	3128

Alternate Usage for Configuration of an Up-Stream Proxy Server

db configuration set squid-parent-variable value
signal-event proxy-update

Affected file: /etc/squid/squid.conf

squid-parent-variable	Target	Default
SquidParent	name-or-ip-of-upstream-proxy-server	(none)
SquidParentPort	port-number-used-by-upstream-proxy-server	(none)

(un-do using 'db configuration delete SquidParent', 'signal-event proxy-update')

SSH (sshd)

Usage

db configuration setprop sshd variable value
signal-event remoteaccess-update

Affected file: /etc/ssh/sshd_config

Variable	Target	Default
TCPPort	Port	22
Protocol	Protocol	2
UsePAM	UsePAM	no
MaxAuthTries	MaxAuthTries	2
MaxStartups	MaxStartups	10:30:60
PasswordAuthentication	PasswordAuthentication	no
PermitRootLogin	PermitRootLogin	no
AllowHosts	AllowHosts	IP address(es) list

	Note:
	Currently in SME 7.2 and up, TCPPort is configurable via server-manager, under Remote Access menu. To configure AllowHosts: IP address(es) list is a single IP or a comma separated list of IP addresses and/or netmasks (e.g. 16.17.18.19,203.14.64.0/24). Ssh will then only be allowed from those IP addresses. The firewall code will drop ssh connections from any other hosts.

smtpd

Usage

config setprop smtpd variable value
signal-event email-update

Affected file: /var/service/qpsmtpd/runenv

Variable	Target	Default
Instances	Total smtp Instances	40
InstancesPerIP	smtp-Instances-Per-IP	5

yum

Usage

config setprop yum variable value
signal-event yum-modify

Affected file: /etc/yum.conf

Variable	Target	Default
AutoInstallUpdates	Install updates automatically?	disabled
EnableGroups	Enable Groups	0
GPGCheck	Check GPG signature for repositories	0
PackageFunctions	Display individual packages in 'Software Installer'	disabled
RandomDelay	Random Delay	120
status	Yum's status	enabled
RestrictRepo	Repo names whose contents should be excluded from 'Available Packages' in the 'Software Installer'	none
RestrictRPM	All or part of an RPM name to be excluded from 'Available Packages' in the 'Software Installer'	none

See also 'db yum_repositories'

Miscellaneous Other DB Variables

Note:

This is meant to be an easy place to add db variable information if you don't have time to put it into the correct section(s) above. You can find most of the template fragments affected by a given db variable if you execute: cd /etc/e-smith fgrep -lR variable templ*/* | less where variable is the name of the variable using correct capitalization Note that any command listed here is to be executed on one line!

Command	service(s)	config file(s)	notes
db domains setprop test.com MailServer a.b.c.d	qpsmtpd; qmail; fetchmail	/var/service/qpsmtpd/config/goodrcptto; /var/service/qpsmtpd/config/peers/local; /var/service/qpsmtpd/config/peers/0; /var/service/qpsmtpd/plugins; /var/service/qmail/control/virtualdomains; /var/service/qmail/control/smtproutes; /etc/fetchmail	Forward all email for the specified domain to the IP address a.b.c.d. a.b.c.d can be either local or remote. By default, the recipient address will be verified as valid on a.b.c.d before SME accepts the inbound message.
config set SquidParent <hostname or IP>	squid, diald	/etc/diald.filter, /etc/squid/squid.conf	Configure squid to peform all web downloads from the specified upstream proxy server
config set SquidParentPort <portnumber>	squid	/etc/squid/squid.conf	Connect to the upstream proxy server using <portnumber>. Defaults to 3128 if 'SquidParentPort' is unspecified. Ignored if SquidParent is not set.
config delete SquidParent	squid, diald	/etc/squid/squid.conf, /etc/diald.filter	Return squid to normal operation (no upstream proxy server)
db accounts setprop username Visible internal	?	?	Make an email address invisible from outside? (see http://forums.contribs.org/index.php?topic=36302.0)
db <database> delprop key property ; /etc/e-smith/events/actions/initialize-default-databases	various	various	Restore the developers' default value for property
db <database> delete key ; /etc/e-smith/events/actions/initialize-default-databases	various	various	Restore the developers' default value for each property belonging to the key key
command	service(s)	config file(s)	notes. Copy this block when adding new entries to this table.

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