ssh broken pipe

  • I keep getting broken pipe when ssh into pfSense on my LAN. It began after I upgraded OS from Kubuntu 16.04 to 18.04 when I was still on pfSense 2.4.3-release p1. While on 16.04, I could remain logged in all day. Yes, I have experimented with settings on my /etc/.ssh/config as well as /etc/ssh/sshd_config on pfsense.

    Last week I upgraded to pfSense 2.4.4 and noted that the issue disappeared only to reappear today. These are my ssh settings:

    Host *
    # TCPKeepAlive yes (makes no difference)
    ServerAliveInterval 120
    ServerAliveCountMax 720

    /etc/ssh/sshd_config (all other default settings omitted)
    ClientAliveInterval 120
    ClientAliveCountMax 720

    I tried configuring ssh with but this didn't help either.

    I should add that I'm typically running tcpdump while ssh. Usually I am monitoringt DNS on port 853 or for pfBlockerNG activity.

    I appreciate any help.

    Forgot to add, that I can ssh into other systems and remain logged in for the entire day without getting the broken pipe. Broken pipe ONLY happens ssh to pfSense.

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