Messages from the Original Author

December 12, 2021: Hey, Justin, here. My career changed and I let the domain lapse. Over 10 years since the last release, I noticed that the project was still in use but had been forked a couple of times. I have a new need for syslog-based logging, so, I paid to get the domain back. Over the next few months, I intend to revisit the code base.

December 10, 2021: Syslog4j does not share any base code with Log4j, so is not affected by the CVE-2021-44228 "Log4jShell" vulnerabilty.

Overview & Features

Syslog4j provides client and server implementations of the BSD Syslog protocol (RFC 3164) and the Structured Syslog protocol (RFC 5424).

• Client Protocols: UDP, TCP, TCP over SSL/TLS, Native Unix syslog, and Unix socket
• Server Protocols: UDP, TCP, and TCP over SSL/TLS
• Free software, licensed under the LGPL 2.1 (acceptable Open Source license as stated by the OSI)
• POJO (Plain Ol' Java Object) implementation; no frameworks required
• UDP, TCP, and TCP over SSL/TLS implementations of Syslog protocol (RFC 3164) require no external libraries or JARs
• Unix syslog & Unix socket support verified on Linux, FreeBSD, and Darwin (MacOSX) operating systems
• Extensible coding model for straightforward customization
• TCP and TCP over SSL/TLS implementations run under separate Threads (configurable)
• "BackLog" capability allows logging failures to be properly handled
• Works on JRE/JDK 1.4 and higher
• JUnit Tested, EclEmma used for code coverage analysis
• Support for appending Sequential numbers, Checksum values (CRC32/Adler-32),
  Hashes (SHAx/MD5), and Cryptographic Signatures (HMAC)
• Support for escaping HTML characters to avoid log viewer scripting attacks
• Integrates into Apache Log4j via the Syslog4jAppender more...
• Support for PCI DSS audit logging as per section 10.3 for the PCI DSS 1.2 specification more...
• Compatible with syslogd, syslog-ng from BalaBit IT Security, and other syslog servers

Pre-Requisites

• Structured Syslog protocol (RFC 3164) requires one JAR from the Joda-Time project
• Unix syslog & Unix socket support requires one JAR from the Java Native Access (JNA) project
• Pooled TCP and TCP over SSL/TLS available with the Apache Commons Pool library

Documentation

Support: Mailing Lists

Download: Stable Versions

Download: Development Versions

Which distribution should you use? Click here for an explanation.

Download Sites: Main | Secure | Google

Checksums are SHA2-256. GPG Public Key available here: keyserver1.pgp.com | Main | Secure

Java™ is a registered trademark of Sun Microsystems.