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Compare syslog software
licenseGPLv3 (GPLv2 for v2 branch)
Input Sources
UNIX domain socket
RFC 3195/BEEP (via im3195)
kernel log
mark message generator as an optional input
Standard output (stdout) of an application
Named pipe
Handle multi-line messages like Apache Tomcat or Oracle log messages
Windows Event Log a Windows event logging software such as EventReporter orMonitorWare Agent (both commercial software, both fund rsyslogdevelopment)
Network (Protocol) Support
support for (plain) tcp based syslog
support for GSS-API
ability to limit the allowed network senders (syslog ACLs)
support for syslog-transport-tls based framing on syslog/tcp connections
udp syslog
syslog over RELP
truly reliable message delivery (Why is plain tcp syslog not reliable?)
on the wire (zlib) message compression
support for receiving messages via reliable RFC 3195 delivery
support for TLS/SSL-protected syslog (since 3.19.0)via stunnel
support for IETF's new syslog-protocol draft
support for IETF's new syslog-transport-tls draft (since 3.19.0 - world's first implementation)
support for IPv6
native ability to send SNMP traps
ability to preserve the original hostname in NAT environments and relay chains
Message Filtering
Filtering for syslog facility and priority
Filtering for hostname
Filtering for application
Filtering for message contents
Filtering for sending IP address
ability to filter on any other message field not mentioned above (including substrings and the like)
support for complex filters, using full boolean algebra with and/or/not operators and parenthesis
Support for reusable filters: specify a filter once and use it in multiple selector lines no
support for arbritrary complex arithmetic and string expressions inside filters
ability to use regular expressions in filters
support for discarding messages based on filters
ability to filter out messages based on sequence of appearing (starting with 3.21.3)
powerful BSD-style hostname and program name blocks for easy multi-host support
Supported Database Outputs
MySQL (native ommysql, omlibdbi)
PostgreSQL (native ompgsql, omlibdbi)
Oracle (omlibdbi)
SQLite (omlibdbi)
Microsoft SQL (Open TDS) (omlibdbi)
Sybase (Open TDS) (omlibdbi)
Firebird/Interbase (omlibdbi)
Ingres (omlibdbi)
mSQL (omlibdbi)
Enterprise Features
support for on-demand on-disk spooling of messages
ability to limit disk space used by spool files
each action can use its own, independant set of spool files
different sets of spool files can be placed on different disk
ability to process spooled messages only during a configured timeframe (e.g. only during off-peak hours, during peak hours they are enqueued only) (can independently be configured for the main queue and each action queue)
ability to configure backup syslog/database servers
Professional Support
Config File
config file formatcompatible to legacy syslogd but ugly
ability to include config file from within other config files
ability to include all config files existing in a specific directory
Functionality split in separately loadable modules
Support for third-party input plugins
Support for third-party output plugins
Other Features
ability to generate file names and directories (log targets) dynamically
control of log output format, including ability to present channel and priority as visible log data
native ability to send mail messages (ommail, introduced in 3.17.0)
good timestamp format control; at a minimum, ISO 8601/RFC 3339 second-resolution UTC zone
ability to reformat message contents and work with substrings
support for log files larger than 2gb
support for log file size limitation and automatic rollover command execution
support for running multiple syslogd instances on a single machine
ability to execute shell scripts on received messages
ability to pipe messages to a continously running program
massively multi-threaded for tomorrow's multi-core machines
ability to control repeated line reduction ("last message repeated n times") on a per selector-line basis
supports multiple actions per selector/filter condition
web interfacephpLogCon [also works with php-syslog-ng]
using text files as input source
rate-limiting output actions
discard low-priority messages under system stress
flow control (slow down message reception when system is busy) (advanced, multiple ways to slow down inputs depending on individual input capabilities, based on watermarks)
rewriting messages
output data into various formats
ability to control "message repeated n times" generation
supported platforms Linux, BSD, anecdotical seen on Solaris; compilation and basic testing done on HP UX
DNS cache
Windows Event Log containers / log files (via separate agent application)
Latest version7.2.6 stable (March 2013)
IT development
2013-03-20 17:56:58
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