I need to open port 7001 in a linux server ( RHEL 6.3 ). Firewall is not running.[root@hslsaoid2 ~]# service iptables statusiptables: Firewall is not running.Please find the netstat -ntpl output[root@hslsaoid2 ~]# netstat -ntplActive Internet connections (only servers)Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program nametcp        0      0 0.0.0.0:57991               0.0.0.0:*                   LISTEN      15590/rpc.mountdtcp        0      0 0.0.0.0:875                 0.0.0.0:*                   LISTEN      15586/rpc.rquotadtcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN      1299/rpcbindtcp        0      0 0.0.0.0:55698               0.0.0.0:*                   LISTEN      -tcp        0      0 0.0.0.0:51828               0.0.0.0:*                   LISTEN      -tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN      1582/sshdtcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN      1474/cupsdtcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN      1674/mastertcp        0      0 0.0.0.0:47486               0.0.0.0:*                   LISTEN      1425/rpc.statdtcp        0      0 0.0.0.0:2049                0.0.0.0:*                   LISTEN      -tcp        0      0 0.0.0.0:34658               0.0.0.0:*                   LISTEN      15590/rpc.mountdtcp        0      0 0.0.0.0:42820               0.0.0.0:*                   LISTEN      15590/rpc.mountdtcp        0      0 :::5989                     :::*                        LISTEN      1767/cimservermaintcp        0      0 :::34122                    :::*                        LISTEN      15590/rpc.mountdtcp        0      0 :::111                      :::*                        LISTEN      1299/rpcbindtcp        0      0 :::22                       :::*                        LISTEN      1582/sshdtcp        0      0 :::46679                    :::*                        LISTEN      15590/rpc.mountdtcp        0      0 ::1:631                     :::*                        LISTEN      1474/cupsdtcp        0      0 ::1:25                      :::*                        LISTEN      1674/mastertcp        0      0 :::46521                    :::*                        LISTEN      1425/rpc.statdtcp        0      0 :::36283                    :::*                        LISTEN      -tcp        0      0 :::32896                    :::*                        LISTEN      -tcp        0      0 :::8704                     :::*                        LISTEN      13631/javatcp        0      0 :::2049                     :::*                        LISTEN      -tcp        0      0 :::60929                    :::*                        LISTEN      15590/rpc.mountdI tried to edit in /etc/sysconfig/iptables and restart the firewall but failed..Kindly help to open port..
port opening in linux server
linux;networking