On Mar 15, 2012, at 11:15 PM, Andrew Min Chang wrote: > 1. upsd is a server, this "server" serves "client" but the common meaning of > "net server". Which means upsd could not be seen by other device within the > same LAN.
No, see below. > 2. The real "net server" of UPS are drivers, such as usbhid-ups. The > permission of access from network are done by tcp-wrapper. Permissions can be controlled by tcp_wrappers, but the actual network server is upsd. (Drivers communicate with upsd over a Unix-domain socket, which is local to the master system.) > 3. If a slave device B wants to connect to a master device A with UPS plugged > into, it just needs to run upsd with a "LISTEN <IP of A>" in upsd.conf Correct. (This is why the LISTEN directive is in upsd.conf, not ups.conf.) Also, in most cases, tcp_wrappers can be replaced by kernel-level firewall rules. -- Charles Lepple clepple@gmail _______________________________________________ Nut-upsuser mailing list [email protected] http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/nut-upsuser
