1e66dbdb6SPoul-Henning Kamp.\" 2e66dbdb6SPoul-Henning Kamp.\" ---------------------------------------------------------------------------- 3e66dbdb6SPoul-Henning Kamp.\" "THE BEER-WARE LICENSE" (Revision 42): 4e66dbdb6SPoul-Henning Kamp.\" <phk@FreeBSD.org> wrote this file. As long as you retain this notice you 5e66dbdb6SPoul-Henning Kamp.\" can do whatever you want with this stuff. If we meet some day, and you think 6e66dbdb6SPoul-Henning Kamp.\" this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 7e66dbdb6SPoul-Henning Kamp.\" ---------------------------------------------------------------------------- 8e66dbdb6SPoul-Henning Kamp.\" 97f3dea24SPeter Wemm.\" $FreeBSD$ 10e66dbdb6SPoul-Henning Kamp.\" 11e66dbdb6SPoul-Henning Kamp.Dd April 11, 1998 12e66dbdb6SPoul-Henning Kamp.Dt NOS-TUN 8 139fe48c6eSRuslan Ermilov.Os 14e66dbdb6SPoul-Henning Kamp.Sh NAME 15e66dbdb6SPoul-Henning Kamp.Nm nos-tun 1659edad7aSPhilippe Charnier.Nd implement ``nos'' or ``ka9q'' style IP over IP tunnel 17e66dbdb6SPoul-Henning Kamp.Sh SYNOPSIS 187c7fb079SRuslan Ermilov.Nm 19e66dbdb6SPoul-Henning Kamp.Fl t 20e66dbdb6SPoul-Henning Kamp.Ar tunnel 21e66dbdb6SPoul-Henning Kamp.Fl s 22e66dbdb6SPoul-Henning Kamp.Ar source 23e66dbdb6SPoul-Henning Kamp.Fl d 24e66dbdb6SPoul-Henning Kamp.Ar destination 25d59cf2acSPoul-Henning Kamp.Fl p 26d59cf2acSPoul-Henning Kamp.Ar protocol_number 27e66dbdb6SPoul-Henning Kamp.Ar target 28e66dbdb6SPoul-Henning Kamp.Sh DESCRIPTION 29e1205e80SPhilippe CharnierThe 30e1205e80SPhilippe Charnier.Nm 31e1205e80SPhilippe Charnierutility is used to establish an 32e66dbdb6SPoul-Henning Kamp.Em nos 33e66dbdb6SPoul-Henning Kampstyle tunnel, (also known as 34e66dbdb6SPoul-Henning Kamp.Em ka9q 35e66dbdb6SPoul-Henning Kampor 36e66dbdb6SPoul-Henning Kamp.Em IP-IP 37e66dbdb6SPoul-Henning Kamptunnel) using a 38e66dbdb6SPoul-Henning Kamp.Xr tun 4 39e66dbdb6SPoul-Henning Kampkernel interface. 40e66dbdb6SPoul-Henning Kamp.Pp 4159edad7aSPhilippe Charnier.Ar Tunnel 42e66dbdb6SPoul-Henning Kampis the name of the tunnel device 4359edad7aSPhilippe Charnier.Pa /dev/tun0 44e66dbdb6SPoul-Henning Kampfor example. 45e66dbdb6SPoul-Henning Kamp.Pp 4659edad7aSPhilippe Charnier.Ar Source 47e66dbdb6SPoul-Henning Kampand 48e66dbdb6SPoul-Henning Kamp.Ar destination 49e66dbdb6SPoul-Henning Kampare the addresses used on the tunnel device. 50e66dbdb6SPoul-Henning KampIf you configure the tunnel against a cisco router, use a netmask of 51e66dbdb6SPoul-Henning Kamp.Dq 255.255.255.252 529806e231SRuslan Ermilovon the cisco. 539806e231SRuslan ErmilovThis is because the tunnel is a point-to-point interface 5459edad7aSPhilippe Charnierin the 55f050f700SMike Pritchard.Fx 5659edad7aSPhilippe Charnierend, a concept cisco doesn't really implement. 57e66dbdb6SPoul-Henning Kamp.Pp 58d59cf2acSPoul-Henning Kamp.Ar Protocol number 59ef8f7ac9SSheldon Hearnsets tunnel mode. 6078d9ac57SBill FumerolaOriginal KA9Q NOS uses 94 but many people use 4 6178d9ac57SBill Fumerolaon the worldwide backbone of ampr.org. 62d59cf2acSPoul-Henning Kamp.Pp 6359edad7aSPhilippe Charnier.Ar Target 64e66dbdb6SPoul-Henning Kampis the address of the remote tunnel device, this must match the source 65e66dbdb6SPoul-Henning Kampaddress set on the remote end. 66e66dbdb6SPoul-Henning Kamp.Sh EXAMPLES 6759edad7aSPhilippe CharnierThis end, a 68f050f700SMike Pritchard.Fx 6959edad7aSPhilippe Charnierbox on address 192.168.59.34: 701252c1bbSRuslan Ermilov.Bd -literal -offset indent 71e66dbdb6SPoul-Henning Kampnos-tun -t /dev/tun0 -s 192.168.61.1 -d 192.168.61.2 192.168.56.45 72e66dbdb6SPoul-Henning Kamp.Ed 73e66dbdb6SPoul-Henning Kamp.Pp 74e66dbdb6SPoul-Henning KampRemote cisco on address 192.168.56.45: 751252c1bbSRuslan Ermilov.Bd -literal -offset indent 76e66dbdb6SPoul-Henning Kampinterface tunnel 0 77e66dbdb6SPoul-Henning Kampip address 192.168.61.2 255.255.255.252 78e66dbdb6SPoul-Henning Kamptunnel mode nos 79e66dbdb6SPoul-Henning Kamptunnel destination 192.168.59.34 80e66dbdb6SPoul-Henning Kamptunnel source 192.168.56.45 81e66dbdb6SPoul-Henning Kamp.Ed 82e66dbdb6SPoul-Henning Kamp.Sh BUGS 83e66dbdb6SPoul-Henning KampWe don't allow for setting our source address for multihomed machines. 8459edad7aSPhilippe Charnier.Sh AUTHORS 85f4d874a1SRuslan Ermilov.An -nosplit 8659edad7aSPhilippe Charnier.An Nickolay N. Dudorov Aq nnd@itfs.nsk.su 8759edad7aSPhilippe Charnierwrote the program, 8859edad7aSPhilippe Charnier.An Poul-Henning Kamp Aq phk@FreeBSD.org 8959edad7aSPhilippe Charnierwrote the man-page. 90d59cf2acSPoul-Henning Kamp.An Isao SEKI Aq iseki@gongon.com 91d59cf2acSPoul-Henning Kampadded a new flag, IP protocol number. 92