+@c ==================================================================
+@node Signals
+@section Signals
+
+@cindex signals
+You can also send the following signals to a running tincd process:
+
+@c from the manpage
+@table @samp
+
+@item ALRM
+Forces tinc to try to connect to all uplinks immediately.
+Usually tinc attempts to do this itself,
+but increases the time it waits between the attempts each time it failed,
+and if tinc didn't succeed to connect to an uplink the first time after it started,
+it defaults to the maximum time of 15 minutes.
+
+@item HUP
+Partially rereads configuration files.
+Connections to hosts whose host config file are removed are closed.
+New outgoing connections specified in @file{tinc.conf} will be made.
+
+@item INT
+Temporarily increases debug level to 5.
+Send this signal again to revert to the original level.
+
+@item USR1
+Dumps the connection list to syslog.
+
+@item USR2
+Dumps virtual network device statistics, all known nodes, edges and subnets to syslog.
+
+@item WINCH
+Purges all information remembered about unreachable nodes.
+
+@end table
+
+@c ==================================================================
+@node Debug levels
+@section Debug levels
+
+@cindex debug levels
+The tinc daemon can send a lot of messages to the syslog.
+The higher the debug level, the more messages it will log.
+Each level inherits all messages of the previous level:
+
+@c from the manpage
+@table @samp
+
+@item 0
+This will log a message indicating tinc has started along with a version number.
+It will also log any serious error.
+
+@item 1
+This will log all connections that are made with other tinc daemons.
+
+@item 2
+This will log status and error messages from scripts and other tinc daemons.
+
+@item 3
+This will log all requests that are exchanged with other tinc daemons. These include
+authentication, key exchange and connection list updates.
+
+@item 4
+This will log a copy of everything received on the meta socket.
+
+@item 5
+This will log all network traffic over the virtual private network.
+
+@end table
+