The service “sshd” appears to be down.

Santi109

• October 17, 2017 22:09

How to fix this error? my server provider told me that some iptables rules blocking most of the ports.. I am really beginner to Linux CentOS.. Any help really appreciated.. Thanks

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  24x7server

  • October 18, 2017 05:14

  Hi, If you have a KVM, VNC, or IMPI access of your machine, then you will have to disable the firewall first on your machine.. Did you change the SSH port?

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  Santi109

  • October 18, 2017 05:30

  I was reinstall sshd with success, what configuration I need to do? sshd was running. but i dont know if I need to make configuration to secure it?

  Hi, If you have a KVM, VNC, or IMPI access of your machine, then you will have to disable the firewall first on your machine.. Did you change the SSH port?

  
  I dont change the SSH port. it is 22.. does i need to disable firewall now?

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  SysSachin

  • October 18, 2017 13:38

  sshd was running. but i dont know if I need to make configuration to secure it?

  
  To secure SSHD you have to change ssh port as well as disable direct root access. Did you installed any other firewall on your server ? like csf or apf ?

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  cPWilliamL

  • October 18, 2017 15:09

  As others have pointed out, you should:

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  • Change the SSH port and ensure the new port is open in iptables
  • Setup a wheel user and disable root SSH access
  • Setup SSH keys and disable password authentication

  The following documentation should be helpful: Manage Wheel Group Users - Documentation - cPanel Documentation Manage root's SSH Keys - Documentation - cPanel Documentation SSH Password Authorization Tweak - Documentation - cPanel Documentation It's best to make these changes via console access, that way, if a change you make results in no access, you can easily revert.

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  Santi109

  • October 20, 2017 10:20

  To secure SSHD you have to change ssh port as well as disable direct root access. Did you installed any other firewall on your server ? like csf or apf ?

  
  I think there is not other firewall. it just iptables.. does any port that haven't been used would be okay?

  As others have pointed out, you should:

  ]
  • Change the SSH port and ensure the new port is open in iptables
  • Setup a wheel user and disable root SSH access
  • Setup SSH keys and disable password authentication

  The following documentation should be helpful:

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  cPanelMichael

  • October 26, 2017 17:58

  Hello, Any utility that allows you to access the server and run commands outside of the SSH service would be suitable. You may also find this thread helpful for choosing an SSH port and configuration: [Tutorial] Interested in increasing the security of your server? Read this. (sshd hardening) Thank you.

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