.TH supernode 1  "Jul 16, 2021" "version 3" "USER COMMANDS"
.SH NAME
supernode \- n2n supernode daemon
.SH SYNOPSIS
.B supernode
<config file>
.br
.B supernode
[OPTION]...
.SH DESCRIPTION
N2N is a peer-to-peer VPN system. Supernode is a node introduction registry,
broadcast conduit and packet relay node for the n2n system. On startup supernode
begins listening on the specified UDP port for node registrations, and other
packets to route. The supernode can service any number of communities and routes
packets only between members of the same community. The supernode does not hold
the community encryption key and so cannot snoop or inject packets into the
community.
.PP
Supernode can service a number of n2n communities concurrently. Traffic does not
cross between communities.
.PP
All logging goes to stdout.
.PP
The config file is similar to the command line, with one option per line.
Lines starting with a "#" are ignored.
An equal sign ('=') should be used between key and value. Example: -p=7777
.SH OPTIONS FOR THE UNDERLYING NETWORK CONNECTION
.TP
\fB\-p \fR<\fIlocal port\fR>
listen on this fixed local UDP port, defaults to 7654
.TP
\fB\-F \fR<\fIfed name\fR>
name of the supernode's federation, defaults to '*Federation'
.TP
\fB\-l \fR<\fIhost:port\fR>
ip address or name, and port of known supernode
.TP
\fB\-m \fR<\fImac address\fR>
fixed MAC address for the supernode, e.g.
 '-m 10:20:30:40:50:60', random otherwise
.TP
\fB\-M\fR
disable MAC and IP address spoofing protection for all
non-username-password-authenticating communities
.SH TAP DEVICE AND OVERLAY NETWORK CONFIGURATION
.TP
\fB\-c \fR<\fIpath\fR>
file containing the allowed communities
.TP
\fB\-a \fR<\fInet-net/n\fR>
subnet range for auto ip address service,
.br
e.g.  '-a 192.168.0.0-192.168.255.0/24',
.br
defaults to '10.128.255.0-10.255.255.0/24'
.SH LOCAL OPTIONS
.TP
\-f
disable daemon mode (UNIX) and run in foreground.
.TP
\fB\-t \fR<\fIport\fR>
management UDP port, for multiple supernodes on a machine, defaults to 5645
.TP
\-v
use verbose logging
.TP
\fB\-u \fR<\fIUID\fR>
numeric user ID to use when privileges are dropped
.TP
\fB\-g \fR<\fIGID\fR>
numeric group ID to use when privileges are dropped
.TP
\fB-h\fR
shows a quick reference including all available options
.TP
\fB--help\fR
shows detailed parameter description

.SH EXAMPLES
.TP
.B supernode -p 7654 -v
Start supernode listening on UDP port 7654 with verbose output.
.PP
.SH RESTART
When supernode restarts it loses all registration information from associated
edge nodes. It can take up to five minutes for the edge nodes to re-register and
normal traffic flow to resume.
.SH EXIT STATUS
supernode is a daemon and any exit is an error
.SH AUTHOR
Luca Deri ( deri (at) ntop.org ), Richard Andrews ( andrews (at) ntop.org ), Don Bindner
.SH SEE ALSO
ifconfig(8) edge(8)