DB Variables Configuration

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Database variables

Template:DrawBoxNote

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).

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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.

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).

signal-event Concept

Thanks for the developers work, you can simplify more the commands using the signal-event proccess. The same example above with signal-event: 

db configuration setprop php MemoryLimit 64M
signal-event remoteaccess-update

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


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


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 remoteaccess-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 remoteaccess-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 remoteaccess-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


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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 remoteaccess-update
Affected file: /var/service/ntpd/env/MEMLIMIT
Variable Target Default
MemLimit MEMLIMIT 12000000


Php

Usage 

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


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 

db configuration setprop smb variable value
signal-event conf-logondrive
Affected file: /etc/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


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


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


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