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Too Many Connections on SSHD (Port 22)

Discussion in 'Security' started by lenbradley, Jan 16, 2017.

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  1. lenbradley

    lenbradley Registered

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    I'm sorry if this issue has been addressed, but I couldn't find any solutions via search.

    The server we are running (WHM 60.0 on CentOS 6.8) is continuously creating a lot of connections on port 22/SSH and I can't figure out why. Attached is a screenshot showing what exactly I am referring to. Connection will pretty quickly grow to 300+ and not go down, which is causing issues with SFTP connections. The only way I've found to alleviate the issue if to run "killall sshd" and then restart the SSH server.

    I'm wondering if anybody has come across this problem and any insight on it? Thanks.
     

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    #1 lenbradley, Jan 16, 2017
  2. cPanelMichael

    cPanelMichael Technical Support Community Manager
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    #2 cPanelMichael, Jan 16, 2017
  3. NOC_Serverpoint

    NOC_Serverpoint Well-Known Member

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    #3 NOC_Serverpoint, Jan 17, 2017
  4. 24x7server

    24x7server Well-Known Member

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    Hi,

    It is better if you could restrict the SSHD service to restricted IPs, or you can add the current IP directly via WHM host access feature and add SSH restriction whenever needed.

    Also, it is advised to have a wheel user used to login instead of direct root login to the server via SSH.

    Use can also use CSF to monitor the IP connections over the SSH to give a better effect.
     
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    #4 24x7server, Jan 17, 2017
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