[Linux] SSH 접속 포트 변경

SSH 접속 포트 변경

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1. sshd_config 파일 수정

[root@dalgong ~]# vim /etc/ssh/sshd_config


#
#Port 22
Port3322 <== 원하는 포트 번호 추가
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

2. sshd service 재시작

[root@dalgong ~]# systemctl restart sshd

[root@dalgong ~]# systemctl status sshd
● sshd.service - SYSV: OpenSSH server daemon
   Loaded: loaded (/etc/rc.d/init.d/sshd; bad; vendor preset: enabled)
   Active: active (running) since Mon 2023-06-12 14:19:05 KST; 21s ago
     Docs: man:systemd-sysv-generator(8)
  Process: 1649 ExecStop=/etc/rc.d/init.d/sshd stop (code=exited, status=0/SUCCESS)
  Process: 1656 ExecStart=/etc/rc.d/init.d/sshd start (code=exited, status=0/SUCCESS)
 Main PID: 1664 (sshd)
   CGroup: /system.slice/sshd.service
           ├─1469 sshd: root@pts/0
           ├─1471 -bash
           └─1664 sshd: /etc/ssh/sbin/sshd [listener] 0 of 10-100 startups

Jun 12 14:19:05 honglim-test systemd[1]: Stopped SYSV: OpenSSH server daemon.
Jun 12 14:19:05 honglim-test systemd[1]: Starting SYSV: OpenSSH server daemon...
Jun 12 14:19:05 honglim-test sshd[1664]: Server listening on 0.0.0.0 port 22.
Jun 12 14:19:05 honglim-test sshd[1664]: Server listening on :: port 22.
Jun 12 14:19:05 honglim-test systemd[1]: Started SYSV: OpenSSH server daemon.
Jun 12 14:19:05 honglim-test sshd[1656]: Starting sshd:[  OK  ]

3. SSH 접속 포트 변경 완료