[root@ISSLABNTL01 ~]# grep -i dns /etc/ssh/sshd_config #UseDNS yes [root@ISSLABNTL01 ~]# sed -i 's/#UseDNS yes/UseDNS no/g' /etc/ssh/sshd_config [root@ISSLABNTL01 ~]# grep -i dns /etc/ssh/sshd_config UseDNS no [root@ISSLABNTL01 ~]# service sshd restart Stopping sshd: [ OK ] Starting sshd: [ OK ] [root@ISSLABNTL01 ~]# exit