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'''6tunnel''' - tunnelling for application that don't speak IPv6
'''6tunnel''' - tunnelling for application that don't speak IPv6
== SYNOPSIS ==
6tunnel [ -146dhfv ] [ -u username ] [ -i password ] [ -I password ] [ -l local_host ] [ -L limit ] [ -p pid_file ]
[ -m map_file ] local_port remote_host [ remote_port ]
== DESCRIPTION ==
6tunnel  allows  you to use services provided by IPv6 hosts with IPv4-only applications and vice-versa. It can bind
to any of your IPv4 (default) or IPv6 addresses and forward all data to IPv4 or IPv6 (default) host. For example
6tunnel -1 6668 irc6.net 6667
will be enough to connect to IPv6 irc server with
irc foobar localhost:6668
If you don't wish to run 6tunnel every time you want to show your :c001: or :dead: IPv6 address on IRC, you can use
-i parameter, which makes 6tunnel ask your client for specified password. Just run
6tunnel -i dupa.8 31337 irc6.net 6667
and then type
irc foobar localhost:31337:dupa.8
If your IRC server requires you to send password, specify it with -I parameter -- after successful proxy  authenti‐
cation 6tunnel will send it to the server.
6tunnel  can also be used as a tunnel for all other combinations of IPv4 and IPv6 endpoints. If remote host doesn't
have any IPv6 addresses, 6tunnel will use the IPv4 one. In other cases, use -4 parameter which makes  IPv4  address
the preferred one. For IPv6-to-any tunnels use -6 which makes 6tunnel bind to IPv6 address.


== OPTIONS ==
== OPTIONS ==
  -1     Exit after first connection.
  -1   Exit after first connection.


  -4     Prefer IPv4 endpoint if the machine has both address types.
  -4   Prefer IPv4 endpoint if the machine has both address types.


  -6     Listen on IPv6 address (IPv4 is default).
  -6   Listen on IPv6 address (IPv4 is default).


  -d     Don't detach.
  -d   Don't detach.


  -f     Force tunneling even if remote host is not resolvable at the execution time.
  -f   Force tunneling even if remote host is not resolvable at the execution time.


  -h     Print hex dump of every packet received or sent.
  -h   Print hex dump of every packet received or sent.


-u username
-u username || Change UID and GID after bind().
Change UID and GID after bind().


-i password
-i password
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-I password
-I password
If you are using 6tunnel as an IRC proxy and the IRC server requires you to send password, place it right
If you are using 6tunnel as an IRC proxy and the IRC server requires you to send password, place it right
here.
here.


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-m map_file
-m map_file
Binds to specified IPv6 addresses on basis of source IPv4 address. The file contains one mapping per line
Binds to specified IPv6 addresses on basis of source IPv4 address.  
with IPv4 source address and corresponding IPv6 address. Only listed hosts are allowed to connect. If you
* The file contains one mapping per line
want to allow any host, add mapping for default or 0.0.0.0 address. Example:
with IPv4 source address and corresponding IPv6 address.  
* Only listed hosts are allowed to connect.  
* If you
want to allow any host, add mapping for default or 0.0.0.0 address.  
* Example:


  192.168.0.2 3ffe:8010:18::1000:2
  192.168.0.2 3ffe:8010:18::1000:2
  192.168.0.3 3ffe:8010:18::1000:3
  192.168.0.3 3ffe:8010:18::1000:3


-v     Be verbose and don't detach.
-v   Be verbose and don't detach.


== NOTES ==
== NOTES ==
Option -H to disable all resolver hints has been removed since proper combination of -4 and -6 will yield in any
Option -H to disable all resolver hints has been removed since proper combination of -4 and -6 will yield in any
combination of IPv4 and IPv6 sources and destinations.
combination of IPv4 and IPv6 sources and destinations.
== SIGNALS ==
Sending SIGHUP forces map file reload.
== BUGS ==
Terrible man page. Hex dump doesn't include IRC proxy authentication.  IRC proxy requires your client to send pass‐
word first (don't worry ircii, EPIC, BitchX, mIRC and many more will work). No logging except debug output.
== SEE ALSO ==
ssh(1)

Aktuelle Version vom 14. Juni 2026, 00:51 Uhr

6tunnel - tunnelling for application that don't speak IPv6

OPTIONS

-1   Exit after first connection.

-4   Prefer IPv4 endpoint if the machine has both address types.

-6   Listen on IPv6 address (IPv4 is default).

-d   Don't detach.

-f   Force tunneling even if remote host is not resolvable at the execution time.

-h   Print hex dump of every packet received or sent.

-u username || Change UID and GID after bind().

-i password Act as an IRC proxy and require user to authenticate.

-I password If you are using 6tunnel as an IRC proxy and the IRC server requires you to send password, place it right here.

-l local_host Listen on specified address (IPv4, or IPv6 if -6 used).

-L limit Limit simultaneous connections.

-p pid_file Write down pid to specified file.

-s source_host Connect to the remote host using specified source address.

-m map_file Binds to specified IPv6 addresses on basis of source IPv4 address.

  • The file contains one mapping per line

with IPv4 source address and corresponding IPv6 address.

  • Only listed hosts are allowed to connect.
  • If you

want to allow any host, add mapping for default or 0.0.0.0 address.

  • Example:
192.168.0.2 3ffe:8010:18::1000:2
192.168.0.3 3ffe:8010:18::1000:3

-v Be verbose and don't detach.

NOTES

Option -H to disable all resolver hints has been removed since proper combination of -4 and -6 will yield in any combination of IPv4 and IPv6 sources and destinations.

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