https://copr.fedoraproject.org/coprs/czanik/

# vi /etc/yum.repos.d/czanik.repo

[czanik-syslog-ng36epel6]
name=Copr repo for syslog-ng36epel6 owned by czanik
baseurl=https://copr-be.cloud.fedoraproject.org/results/czanik/syslog-ng36epel6/epel-6-$basearch/
skip_if_unavailable=True
gpgcheck=1
gpgkey=https://copr-be.cloud.fedoraproject.org/results/czanik/syslog-ng36epel6/pubkey.gpg
enabled=1

# yum install syslog-ng syslog-ng-mongodb

# syslog-ng --version
syslog-ng 3.6.2
Installer-Version: 3.6.2
Revision: 
Compile-Date: Apr 27 2015 09:49:20
Available-Modules: afsocket-tls,afmongodb,afsocket,cryptofuncs,pseudofile,basicfuncs,afsocket-notls,linux-kmsg-format,afstomp,affile,afsql,syslogformat,afamqp,afprog,dbparser,afuser,confgen,system-source,csvparser,graphite
Enable-Debug: off
Enable-GProf: off
Enable-Memtrace: off
Enable-IPv6: on
Enable-Spoof-Source: off
Enable-TCP-Wrapper: on
Enable-Linux-Caps: on