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Diffstat (limited to 'net/dhisd/DESCR')
| -rw-r--r-- | net/dhisd/DESCR | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/dhisd/DESCR b/net/dhisd/DESCR new file mode 100644 index 00000000000..0537287416d --- /dev/null +++ b/net/dhisd/DESCR @@ -0,0 +1,20 @@ +By the means of a DHIS client a host which is assigned a dynamic +IP address (either from its ISP or from DHCP) is able to communicate +with a DHIS server in order to advertise its newly acquired IP +address. + +The DHIS server (permanently online) listens to UDP messages from +its clients and authenticates these against its knowledge of keys. +When authentication is successful the DHIS server updates one or +more databases with the newly received IP address for the given +client. + +The server then keeps sending, every period of time, check requests +to each of its connected clients. These need to be acknowledged. +If not the server will consider, on an individual basis, that the +client has disconnected and will +again update the databases to an offline state. + +Alternativelly the server may receive an OFFLINE_REQ packet from +the client, in which case the DNS record is updated at once and +the online state droped. |