102 lines
3 KiB
Groff
102 lines
3 KiB
Groff
.TH TAYGA "8" "June 2011" "TAYGA 0.9.2" ""
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.SH NAME
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tayga \- stateless NAT64 daemon
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.SH SYNOPSIS
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.B tayga
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.I [OPTION]...
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.PP
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.B "tayga \-\-mktun"
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.I [OPTION]...
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.PP
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.B "tayga \-\-rmtun"
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.I [OPTION]...
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.SH DESCRIPTION
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TAYGA is a stateless NAT64 daemon for Linux. Using the in-kernel TUN network
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driver, TAYGA receives IPv4 and IPv6 packets from the host's network stack,
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translates them to the other protocol, and then sends the translated packets
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back to the host using the same TUN interface.
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.P
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Translation is compliant with IETF Internet-Draft
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draft-ietf-behave-v6v4-xlate-23, and address mapping is performed in
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accordance with RFC 6052. Optionally, TAYGA may be configured to dynamically
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map IPv6 hosts to addresses drawn from a configured IPv4 address pool.
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.P
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As a stateless NAT, TAYGA requires a one-to-one mapping between IPv4 addresses
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and IPv6 addresses. Mapping multiple IPv6 addresses onto a single IPv4
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address can be achieved by mapping IPv6 addresses to private IPv4 addresses
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with TAYGA and then using a stateful NAT44 (such as the iptables(8) MASQUERADE
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target) to map the private IPv4 addresses onto the desired single IPv4 address.
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.P
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TAYGA's configuration is stored in the tayga.conf(5) file, which is usually
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found in /etc/tayga.conf or /usr/local/etc/tayga.conf.
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.SH INVOCATION
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Without the
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.B \-\-mktun
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or
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.B \-\-rmtun
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options, the `tayga` executable runs as a daemon, translating packets as
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described above.
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.P
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The
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.B \-\-mktun
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and
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.B \-\-rmtun
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options instruct TAYGA to create or destroy, respectively, its configured TUN
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device as a "persistent" interface and then immediately exit.
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.P
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Persistent TUN devices remain present on the host system even when TAYGA is
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not running. This allows host-side network parameters and firewall rules to
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be configured prior to commencement of packet translation. This may simplify
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network configuration on the host; for example, systems which use a
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Debian-style /etc/network/interfaces file may configure TAYGA's TUN device at
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boot by running `tayga --mktun` as a "pre-up" command and then configuring the
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TUN device as any other network interface.
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.SH OPTIONS
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.TP
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.BI "\-c " configfile " | \-\-config " configfile
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Read configuration options from
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.I configfile
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.TP
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.B \-d
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Enable debug messages (enables
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.B \-\-nodetach
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as well)
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.TP
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.B "\-n | \-\-nodetach"
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Do not detach from terminal
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.TP
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.BI "\-u " userid " | \-\-user " userid
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Set uid to
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.I userid
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after initialization
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.TP
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.BI "\-g " groupid " | \-\-group " groupid
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Set gid to
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.I groupid
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after initialization
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.TP
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.B "\-r | \-\-chroot"
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chroot() to data\-dir (specified in config file)
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.TP
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.BI "\-p " pidfile " | \-\-pidfile " pidfile
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Write process ID of daemon to
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.I pidfile
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.SH AUTHOR
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Written by Nathan Lutchansky <lutchann@litech.org>
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.SH COPYRIGHT
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Copyright \(co 2010 Nathan Lutchansky
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.br
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License GPLv2+: GNU GPL version 2 or later
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.br
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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.SH "SEE ALSO"
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.BR tayga.conf (5)
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.br
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.BR <http://www.litech.org/tayga/>
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