> > - ssh from nagios server to all other monitored remote servers = working > - tried ssh login from command line of nagios server = timeout, no connect >
How are these functionally different? What does tcpdump show? Are the ssh packets from the nagios sever making it to the target CentOS VM? What about ping? Or telneting to the port of another running service on the VM? Did the VM get vmontioned to a VM host that potentially doesn't have the proper network configuration? On Tue, May 12, 2020 at 3:54 PM Howard White <[email protected]> wrote: > Madness continues. > > Working in a CentOS environment; connecting to servers. The connection > pair in question has been working for over a year without issues - > specifically querying various Nagios checks over ssh (works great, more > secure than NRPE). Today, remote server (hosted on VMWare), Nagios > checks of VMWare host (not ssh) work fine, guest checks do not. > > Troubleshooting: > > - ssh from nagios server to all other monitored remote servers = working > - tried ssh login from command line of nagios server = timeout, no connect > - tried ssh login from other CentOS systems to remote server = works > - checked firewall on remote server = not active > - tried restarting sshd on remote server = no change > - nagios server got restarted 8 days ago and ssh worked until remote > server boot this morning > - /var/log/secure gives no activity during attempted ssh connection from > nagios server; /var/log/secure shows activity when ssh connected from > alternate system > - the alternate servers are probably further behind on openssl updates > than the nagios server > - oh yeah, tried ssh connect calling DNS names and IP addresses = no > difference > - ssh from nagios server to remote VMWare host = working > > WhaddIdo??? > > Howard > > -- > -- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nlug-talk?hl=en > > --- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/nlug-talk/79138c43-a0a9-cf63-5a51-b301ac2b445f%40vcch.com > . > -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en --- You received this message because you are subscribed to the Google Groups "NLUG" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/nlug-talk/CA%2B6_KC9hmHbKDxY6JgAf3%2BMo-aDYdnnayJBxkF9%2BDZoNZs1MTg%40mail.gmail.com.
