On Nov 9, 2014, at 3:48 PM, Steve Read <sd_r...@hotmail.com> wrote: > I would like to verify my understanding keeping in mind I have a one master > and one slave computer. > > When the master gets the low batt/noAC signal it initiates a broadcast > packet(s) on port 3493. > > 1) Is this correct?
No, the slave computer's upsmon process connects to the master (via TCP, so point-to-point, not broadcast), and listens for the OB (on battery) and then "OB LB" (on battery; low battery) status. (Not to say that some other UPS shutdown software couldn't broadcast, but port 3493 is reserved for NUT.) > Then the slave computer must have this port open and it listens on this port > for the shut-down command. > > 2) Is this correct? It's the other way around: the master (via upsd) listens on port 3493, and the slave connects to that port. > On the slave if I run the following: > > steve@MyDesktop:~$ nmap -p 3493 192.168.0.6 > > Starting Nmap 6.40 ( http://nmap.org ) at 2014-11-09 15:42 EST > Nmap scan report for 192.168.0.6 > Host is up (0.00013s latency). > PORT STATE SERVICE > 3493/tcp closed nut > > Nmap done: 1 IP address (1 host up) scanned in 11.06 seconds > > Which tells me this port is configured for nut but it is closed? As mentioned above, that is expected. But if you run it against the master (192.168.0.7, if I understand correctly) from the slave, you should see that it is open. > I have rebooting and starting and stopping the service using: > > sudo service ups-monitor stop > sudo service ups-monitor start > But it remains closed. > > 3) Assuming this should be open how do I fix this? You mentioned that you have a "LISTEN 0.0.0.0" line in upsd.conf on the master - has upsd been restarted since that change was made? Other than that, you should be set. Do things match the "netstat" output I mentioned in a previous email? -- Charles Lepple clepple@gmail
_______________________________________________ Nut-upsuser mailing list Nut-upsuser@lists.alioth.debian.org http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
