Provided by: 6tunnel_0.12-1_amd64 bug


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


       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 ]


       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 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 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 authentication 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.


       -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 address. Example:


       -v     Be verbose and don't detach.


       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.


       Sending SIGHUP forces map file reload.


       #ipv6 crew, Lam.


       Terrible  man page. Hex dump doesn't include IRC proxy authentication.  IRC proxy requires
       your client to send password first (don't worry ircii, EPIC, BitchX, mIRC  and  many  more
       will work). No logging except debug output.


       Wojtek  Kaniewski  (,  Dariusz  Jackowski  (, Ramunas
       Lukosevicus (, Roland Stigge (



                                           Oct 22, 2016                                6TUNNEL(1)