Please whitelist cPanel in your adblocker so that you’re able to see our version release promotions, thanks!

The Community Forums

Interact with an entire community of cPanel & WHM users!

Too Many Connections on SSHD (Port 22)

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

Tags:
  1. lenbradley

    lenbradley Registered

    Joined:
    Nov 19, 2014
    Messages:
    1
    Likes Received:
    0
    Trophy Points:
    1
    cPanel Access Level:
    Website Owner
    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.
     

    Attached Files:

    #1 lenbradley, Jan 16, 2017
  2. cPanelMichael

    cPanelMichael Forums Analyst
    Staff Member

    Joined:
    Apr 11, 2011
    Messages:
    43,667
    Likes Received:
    1,788
    Trophy Points:
    363
    cPanel Access Level:
    Root Administrator
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #2 cPanelMichael, Jan 16, 2017
  3. NOC_Serverpoint

    NOC_Serverpoint Well-Known Member

    Joined:
    Jul 3, 2016
    Messages:
    102
    Likes Received:
    6
    Trophy Points:
    18
    cPanel Access Level:
    Website Owner
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #3 NOC_Serverpoint, Jan 17, 2017
  4. 24x7server

    24x7server Well-Known Member

    Joined:
    Apr 17, 2013
    Messages:
    1,786
    Likes Received:
    82
    Trophy Points:
    78
    Location:
    India
    cPanel Access Level:
    Root Administrator
    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.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
    #4 24x7server, Jan 17, 2017
(You must log in or sign up to post here.)
Loading...
Similar Threads - Many Connections SSHD
  1. Lethe

    FTP too many connections - None listed in cPanel

    Lethe, May 16, 2018, in forum: General Discussion
    Replies:
    1
    Views:
    60
    Infopro
    May 16, 2018
  2. Rodrigo Gomes

    Very strange IP ( 0.0.0.4) making many connections

    Rodrigo Gomes, Jun 24, 2017, in forum: Security
    Replies:
    9
    Views:
    733
    Rodrigo Gomes
    Jun 29, 2017
  3. Wsupport

    421 too many concurrent smtp connections

    Wsupport, Apr 5, 2017, in forum: E-mail Discussion
    Replies:
    2
    Views:
    1,384
    cPanelMichael
    Apr 6, 2017
  4. sahostking

    Too many connections error

    sahostking, Jun 30, 2016, in forum: E-mail Discussion
    Replies:
    3
    Views:
    1,515
    cPanelMichael
    Jul 10, 2016
  5. hicom

    Shutdown halts with many Unmounted /home/virtfs

    hicom, May 20, 2018, in forum: General Discussion
    Replies:
    3
    Views:
    80
    hicom
    May 21, 2018

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...
    Dismiss Notice