Provided by: stuntman-server_1.2.7-1.1_amd64 
NAME
stunserver - STUN protocol service (RFCs: 3489, 5389, 5789, 5780)
SYNOPSIS
stunserver [OPTIONS]
DESCRIPTION
stunserver starts a STUN listening service that responds to STUN binding requests from
remote clients. Options are described below.
OPTIONS
The following options are supported.
--mode MODE
--primaryinterface INTERFACE
--altinterface INTERFACE
--primaryport PORTNUMBER
--altport PORTNUMBER
--family IPVERSION
--protocol PROTO
--maxconn MAXCONN
--verbosity LOGLEVEL
--primaryadvertised
--altadvertised
--help
Details of each option are as follows.
--mode MODE
Where the MODE parameter specified is either "basic" or "full". In basic mode, the server
listens on a single port. Basic mode is sufficient for basic NAT traversal scenarios in
which a client needs to discover its external IP address and obtain a port mapping for a
local port it is listening on. The STUN CHANGE-REQUEST attribute is not supported in
basic mode.
In full mode, the STUN service listens on two different interfaces and two different ports
on each. A client binding request may specify an option for the server to send the
response back from one of the alternate interfaces and/or ports. Full mode facilitates
clients attempting to discover NAT behavior and NAT filtering behavior of the network they
are on. Full mode requires two unique IP addresses on the host. When run over TCP, the
service is not able to support a CHANGE-REQUEST attribute from the client.
If this parameter is not specified, basic mode is the default.
* * * * *
--primaryinterface INTERFACE
Where INTERFACE specified is either a local IP address (e.g. "192.168.1.2") of the host
or the name of a network interface (e.g. "eth0").
The interface or address specified will be used by the service as the primary listening
address.
In basic mode, the default is to bind to all available adapters (INADDR_ANY). In full
mode, the default is to bind to the first non-localhost adapter with a configured IP
address.
* * * * *
--altinterface INTERFACE
Where INTERFACE specified is either a local IP address (e.g. "192.168.1.3") of the host
or the name of a network interface (e.g. "eth1").
This parameter is nearly identical as the --primaryinterface option except that it
specifies the alternate listening address for full mode.
This option is ignored in basic mode. In full mode, the default is to bind to the second
non-localhost adapter with a configured IP address.
* * * * *
--primaryport PORTNUM
Where PORTNUM is a value between 1 to 65535.
This is the primary port the server will bind to for listening for incoming binding
requests. The service will bind both the primary address and the alternate address to
this port.
The default is 3478.
* * * * *
--altport PORTNUM
Where PORTNUM is a value between 1 to 65535.
This is the alternate port the server will bind to for listening for incoming binding
requests. The service will bind both the primary address and the alternate address to
this port.
This option is ignored in basic mode. The default is 3479.
* * * * *
--family IPVERSION
Where IPVERSION is either "4" or "6" to specify the usage of IPV4 or IPV6.
The default family is 4 for IPv4 usage.
* * * * *
--protocol PROTO
Where PROTO is either IP protocol, "udp" or "tcp".
udp is the default.
* * * * *
--maxconn MAXCONN
Where MAXCONN is a value between 1 and 100000.
For TCP mode, this parameter specifies the maximum number of simultaneous connections that
can exist at any given time.
This parameter is ignored when the protocol is UDP. The default value is 1000
* * * * *
--verbosity LOGLEVEL
Where LOGLEVEL is a value greater than or equal to 0.
This parameter specifies how much is printed to the console with regards to
initialization, errors, and network activity. A value of 0 specifies a very minimal
amount of output. A value of 1 shows slightly more. A value of 2 shows even more.
Specifying 3 will show a lot more.
The default is 0.
* * * * *
--primaryadvertised PRIMARY-IP
--altadvertised ALT-IP
Where PRIMARY-IP and ALT-IP are valid numeric IP address strings (e.g. "101.23.45.67")
that are the public IP addresses of the --primaryinterface and --altinterface addresses
discussed above.
These two parameters are for advanced usage only. It is intended for support of running a
STUN server in full mode on Amazon EC2 or other hosted environment where the server is
running behind a NAT. Do not set this parameter unless you know specifically the effect
it creates.
Normally, without these parameters being set, the ORIGIN attribute, OTHER-ADDRESS
attribute, and CHANGED-ADDRESS attributes are are determined by querying the local
adapters or sockets for the IP address they are listening on. When running the server in
a NAT environment, binding responses will still contain a correct set of mapping address
attributes, such that P2P connectivity may succeed. However, the the ORIGIN, OTHER-
ADDRESS, and CHANGED-ADDRESS attributes sent by the server will be incorrect. The impact
of sending an incorrect OTHER-ADDRESS or CHANGED-ADDRESS will result in a client
attempting to do NAT Behavior tests or NAT filtering tests to report an incorrect result.
For more details, visit www.stunprotocol.org for details on how to correctly set these
parameters for use within Amazon EC2.
* * * * *
--help
Prints this help page
EXAMPLES
stunserver
With no options, starts a basic STUN binding service on UDP port 3478.
stunserver --mode full --primaryinterface 128.34.56.78 --altinterface
128.34.56.79 Above example starts a dual-host STUN service on the the interfaces
identified by the IP address "128.34.56.78" and "128.34.56.79". There are four UDP
socket listeners
128.34.56.78:3478 (Primary IP, Primary Port) 128.34.56.78:3479 (Primary IP,
Alternate Port) 128.34.56.79:3478 (Primary IP, Primary Port) 128.34.56.79:3479
(Alternate IP, Alternate Port)
An error occurs if the addresses specified do not exist on the local host running the
service.
stunserver --mode full --primaryinterface eth0 --altinterface eth1
Same as above, except the interfaces are specified by their names as enumerated by
the system. (The "ifconfig" or "ipconfig" command will enumerate available
interface names.
AUTHOR
john selbie (john@selbie.com)