if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nginx') == -1 " rDNS Module " Make a reverse DNS (rDNS) lookup for incoming connection and provides simple access control of incoming hostname by allow/deny rules syn keyword ngxDirectiveThirdParty rdns syn keyword ngxDirectiveThirdParty rdns_allow syn keyword ngxDirectiveThirdParty rdns_deny endif