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NOS-TUN(8)		FreeBSD	System Manager's Manual		    NOS-TUN(8)

NAME
     nos-tun --	implement ``nos'' or ``ka9q'' style IP over IP tunnel

SYNOPSIS
     nos-tun -t	tunnel -s source -d destination	-p protocol_number [source]
	     target

DESCRIPTION
     The nos-tun utility is used to establish an nos style tunnel, (also known
     as	ka9q or	IP-IP tunnel) using a tun(4) kernel interface.

     Tunnel is the name	of the tunnel device /dev/tun0 for example.

     Source and	destination are	the addresses used on the tunnel device.  If
     you configure the tunnel against a	cisco router, use a netmask of
     ``255.255.255.252'' on the	cisco.	This is	because	the tunnel is a	point-
     to-point interface	in the FreeBSD end, a concept cisco does not really
     implement.

     Protocol number sets tunnel mode.	Original KA9Q NOS uses 94 but many
     people use	4 on the worldwide backbone of ampr.org.

     Target is the address of the remote tunnel	device,	this must match	the
     source address set	on the remote end.

EXAMPLES
     This end, a FreeBSD box on	address	192.168.59.34:

	   nos-tun -t /dev/tun0	-s 192.168.61.1	-d 192.168.61.2	192.168.56.45

     Remote cisco on address 192.168.56.45:

	   interface tunnel 0
	   ip address 192.168.61.2 255.255.255.252
	   tunnel mode nos
	   tunnel destination 192.168.59.34
	   tunnel source 192.168.56.45

AUTHORS
     Nickolay N. Dudorov <nnd@itfs.nsk.su> wrote the program, Poul-Henning
     Kamp <phk@FreeBSD.org> wrote the man-page.	 Isao SEKI <iseki@gongon.com>
     added a new flag, IP protocol number.

BUGS
     We	do not allow for setting our source address for	multihomed machines.

FreeBSD	10.1			April 11, 1998			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | EXAMPLES | AUTHORS | BUGS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=nos-tun&sektion=8&manpath=FreeBSD+10.1-RELEASE>

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