Section: Maintenance Commands (8)Updated: July 1, 1988Local indexUp
zephyrd - Zephyr server daemon
is the central server for the Zephyr Notification System.
It maintains a location database of all currently logged-in users, and a
subscription database for each user's Zephyr clients.
communicates with daemons running on other Zephyr server hosts, to
provide a reliable service.
While running, any unusual conditions are recorded via
to facility local6 at various levels.
option enables logging of additional debugging information.
is executed, it requests a list of server machines from Hesiod and
initializes its state from any
zephyrds executing on the other known servers. This initialization
is only performed after the zephyrds have authenticated themselves
to each other via Kerberos.
The server then enters a dispatch loop, servicing requests from clients and
enables logging of additional debugging information.
disables the logging of additional debugging information.
to re-read the default subscription file and to re-query Hesiod about
valid peers. Any peers which are not responding and no longer
mentioned in Hesiod are flushed; any peers not previously named by
Hesiod are added.
SIGINT and SIGTERM
to gracefully shut down.
to dump the location and subscription databases to
in an ASCII format.
Certain notice classes are restricted by the Zephyr server. Each such
class has access control lists enumerating who may transmit (xmt-*.acl) or
subscribe to that particular class. Subscriptions may be
restricted either absolutely (sub-*.acl files), or by instance restrictions.
iws-*.acl files control subscriptions to wildcarded instances.
iui-*.acl files control subscriptions to instances which are not the
Kerberos principal identity of the subscriber.
If an access control list of a given type is absent, there is no
restriction of that type on the class, except that any notices of the
class must be authenticated.
The class registry lists all classes which are restricted.
List of classes which are restricted
Access Control Lists for instance-wildcard restrictions
Access Control Lists for instance-identity restrictions
Access Control Lists for subscribing
Access Control Lists for transmitting
Kerberos 4 Service keys
Kerberos V Service keys
Current Kerberos tickets for exchange with other servers
File containing an ASCII dump of the database.
The current implementation of the Zephyr server (zephyrd(8)) makes
no distinction between realm-announced, net-visible and net-announced