From syslog-ng.conf(5) long_hostnames(yes|no) This is a deprecated alias for chain_hostnames(). http://www.gentoo.org/doc/en/security/security-handbook.xml?part=1&chap=3#doc_chap4 has long_hostnames as an option. This should be replaced with chain_hostnames. Reproducible: Always Steps to Reproduce:
Fixed. Thanks for reporting.