Fedora starts the SSH service

1. Fedora starts the sshd service:

1. Check whether the SSH service is installed:

[[Email protected] ~] # Rpm-Qa | grep openssh-Server

Openssh-server-5.3p1-19.fc12.i686 (this line indicates installed)

If the SSH service is not installed, enter:

# Yum install OpenSSH-Server

Install

 

2. modify the configuration file

# Vi/etc/ssh/sshd_config

# Port 22: The listening port number. The default value is 22, which can be customized.

# Protocols supported by Protocol 2. The default setting is good and you do not need to modify them.

# Permitrootlogin yes: whether to allow direct root logon. It is best to set this parameter to No.

# Maximum number of mmaxauthtries 6 logins. The default value is 6. We recommend that you set this value to 3 to prevent other users from failing to use their passwords.

After modifying the configuration, restart the SSH service:

[[Email protected] ~] #/Etc/rc. d/init. d/sshd restart

Stopping sshd: [OK]

Starting sshd: [OK]:

 

3. view the sshd status:

# Service sshd status

 

4. Add port 22 (or other custom ports) to the firewall settings and mark it as accept.

# Iptables-A input-p tcp -- dport 22-J accept

(This sentence is very important, otherwise the external connection will fail .)

You can also add the above parameters to the firewall configuration:

# Vi/etc/sysconfig/iptables

Add:-A input-M state -- state new-m tcp-p tcp -- dport 22-J accept

Save and restart iptables.

For more information, see iptables usage.

 

 

Ii. Start sshd service in fedora15/16/17:

Since fedora 15/16 uses the systemd service,

1. Starting the SSH service is somewhat different from the above

# Systemctl start sshd. Service

Or # service sshd start

You can also use restart and stop to control the sshd service.

 

 

2. Set to enable the service when the system starts.

# Systemctl enable sshd. Service

 

3. You also need to enable port 22 of the firewall.

# Iptables-A input-p tcp -- dport 22-J accept

You can also add the above parameters to the firewall configuration:

# Vi/etc/sysconfig/iptables

Add:-A input-M state -- state new-m tcp-p tcp -- dport 22-J accept

Save and restart iptables.

 

For more information, see iptables usage.

 

Fedora starts the SSH service