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If flock is available, ejabberdctl will use it to grab one of a bound number of connection names. This allows concurrent connections while using a bound number of atoms. Using PID, timestamps or random strings for transient connection IDs (which would avoid the need for flock) uses an unbound number of atoms. This can effectively DoS servers, as these connection names are not garbage collected. |
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ejabberd - High-Performance Enterprise Instant Messaging Server Quickstart guide 0. Requirements To compile ejabberd you need: - GNU Make - GCC - Libexpat 1.95 or higher - Erlang/OTP R10B-9 or higher. The recommended version is R12B-5. Support for R13 is experimental. - OpenSSL 0.9.6 or higher, for STARTTLS, SASL and SSL encryption. Optional, highly recommended. - Zlib 1.2.3 or higher, for Stream Compression support (XEP-0138). Optional. - Erlang mysql library. Optional. MySQL authentication/storage. - Erlang pgsql library. Optional. PostgreSQL authentication/storage. - PAM library. Optional. For Pluggable Authentication Modules (PAM). - GNU Iconv 1.8 or higher, for the IRC Transport (mod_irc). Optional. Not needed on systems with GNU Libc. - ImageMagick's Convert program. Optional. For CAPTCHA challenges. - exmpp 0.9.2 or higher. Optional. For import/export XEP-0227 files. 1. Compile and install on *nix systems To compile ejabberd, go to the directory src/ and execute the commands: ./configure make To install ejabberd, run this command with system administrator rights (root user): sudo make install These commands will: - Install the configuration files in /etc/ejabberd/ - Install ejabberd binary, header and runtime files in /lib/ejabberd/ - Install the administration script: /sbin/ejabberdctl - Install ejabberd documentation in /share/doc/ejabberd/ - Create a spool directory: /var/lib/ejabberd/ - Create a directory for log files: /var/log/ejabberd/ 2. Start ejabberd You can use the ejabberdctl command line administration script to start and stop ejabberd. For example: ejabberdctl start For detailed information please refer to the ejabberd Installation and Operation Guide