I am trying to configure my ups APC BACK-UPS 450 with nut, when finishing set and to start up the nut daemon, it presents me this error: Communications with UPS myups@localhost lost Broadcast message from nut (Tue Aug 8 11:01:49 2006): UPS myups@localhost is unavailable Broadcast message from nut (Tue Aug 8 11:06:59 2006): UPS myups@localhost is unavailable sion upsd[4048]: Rejecting TCP connection from 127.0.0.1 Aug 8 11:09:04 sion upsmon[4053]: Set username on [myups@localhost] failed: Server disconnected Aug 8 11:09:09 sion upsmon[4053]: Poll UPS [myups@localhost] failed - Write error: Bad file descriptor Aug 8 11:09:14 sion upsd[4048]: Rejecting TCP connection from 127.0.0.1 Aug 8 11:09:14 sion upsmon[4053]: Set username on [myups@localhost] failed: Server disconnected Aug 8 11:09:19 sion upsmon[4053]: Poll UPS [myups@localhost] failed - Write error: Bad file descriptor my ups is connected my server with the serial port com1, my configuration files : ups.conf [myups] driver = apcsmart port = /dev/ttyS0 sdtype = 0 upsd.users [monuser] password = linuxserverblade allowfrom = localhost upsmon master upsd.conf ACL all 0.0.0.0/0 ACL localhost 127.0.0.1/32 ACCESS grant monitor localhost ACCESS deny all all upsmon.conf MONITOR myups@localhost 1 monuser linuxserverblade master somebody has a guide with CentOS or fedora than forums