kevin@peladrine ~ $ nc -v bart.kwzs.be 80
DNS fwd/rev mismatch: bart.kwzs.be != rrcs-67-52-47-70.west.biz.rr.com
bart.kwzs.be [67.52.47.70] 80 (http) open

kevin@peladrine ~ [1] $ nc -v bart.kwzs.be 12345
DNS fwd/rev mismatch: bart.kwzs.be != rrcs-67-52-47-70.west.biz.rr.com

kevin@peladrine ~ [1] $ nc -v bart.kwzs.be 80
DNS fwd/rev mismatch: bart.kwzs.be != rrcs-67-52-47-70.west.biz.rr.com