System Environment/Daemons

dovecot Secure imap and pop3 server
dovecot-mysql MySQL back end for dovecot
dovecot-pgsql Postgres SQL back end for dovecot
dovecot-pigeonhole Sieve and managesieve plug-in for dovecot
elasticsearch A distributed, highly available, RESTful search engine
graylog2-server graylog2-server
haproxy HAProxy reverse proxy for high availability environments
jftpgw An FTP proxy/gateway server.
keepalived Load balancer and high availability service
lldpd Implementation of IEEE 802.1ab (LLDP)
mlogc ModSecurity Audit Log Collector
mod_logslow Module logging slow requests for Apache
mod_security Security module for the Apache HTTP Server