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.\" 11*04970b8dSSevan Janiyan.Dd October 5, 2016 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 278d646af5SRuslan Ermilov.Op Ar source 28e66dbdb6SPoul-Henning Kamp.Ar target 29e66dbdb6SPoul-Henning Kamp.Sh DESCRIPTION 30e1205e80SPhilippe CharnierThe 31e1205e80SPhilippe Charnier.Nm 32e1205e80SPhilippe Charnierutility is used to establish an 33e66dbdb6SPoul-Henning Kamp.Em nos 34e66dbdb6SPoul-Henning Kampstyle tunnel, (also known as 35e66dbdb6SPoul-Henning Kamp.Em ka9q 36e66dbdb6SPoul-Henning Kampor 37e66dbdb6SPoul-Henning Kamp.Em IP-IP 38e66dbdb6SPoul-Henning Kamptunnel) using a 39e66dbdb6SPoul-Henning Kamp.Xr tun 4 40e66dbdb6SPoul-Henning Kampkernel interface. 41e66dbdb6SPoul-Henning Kamp.Pp 4259edad7aSPhilippe Charnier.Ar Tunnel 43e66dbdb6SPoul-Henning Kampis the name of the tunnel device 4459edad7aSPhilippe Charnier.Pa /dev/tun0 45e66dbdb6SPoul-Henning Kampfor example. 46e66dbdb6SPoul-Henning Kamp.Pp 4759edad7aSPhilippe Charnier.Ar Source 48e66dbdb6SPoul-Henning Kampand 49e66dbdb6SPoul-Henning Kamp.Ar destination 50e66dbdb6SPoul-Henning Kampare the addresses used on the tunnel device. 51e66dbdb6SPoul-Henning KampIf you configure the tunnel against a cisco router, use a netmask of 52e66dbdb6SPoul-Henning Kamp.Dq 255.255.255.252 539806e231SRuslan Ermilovon the cisco. 549806e231SRuslan ErmilovThis is because the tunnel is a point-to-point interface 5559edad7aSPhilippe Charnierin the 56f050f700SMike Pritchard.Fx 570227791bSRuslan Ermilovend, a concept cisco does not really implement. 58e66dbdb6SPoul-Henning Kamp.Pp 59d59cf2acSPoul-Henning Kamp.Ar Protocol number 60ef8f7ac9SSheldon Hearnsets tunnel mode. 6178d9ac57SBill FumerolaOriginal KA9Q NOS uses 94 but many people use 4 6278d9ac57SBill Fumerolaon the worldwide backbone of ampr.org. 63d59cf2acSPoul-Henning Kamp.Pp 6459edad7aSPhilippe Charnier.Ar Target 65e66dbdb6SPoul-Henning Kampis the address of the remote tunnel device, this must match the source 66e66dbdb6SPoul-Henning Kampaddress set on the remote end. 67e66dbdb6SPoul-Henning Kamp.Sh EXAMPLES 6859edad7aSPhilippe CharnierThis end, a 69f050f700SMike Pritchard.Fx 7059edad7aSPhilippe Charnierbox on address 192.168.59.34: 711252c1bbSRuslan Ermilov.Bd -literal -offset indent 72e66dbdb6SPoul-Henning Kampnos-tun -t /dev/tun0 -s 192.168.61.1 -d 192.168.61.2 192.168.56.45 73e66dbdb6SPoul-Henning Kamp.Ed 74e66dbdb6SPoul-Henning Kamp.Pp 75e66dbdb6SPoul-Henning KampRemote cisco on address 192.168.56.45: 761252c1bbSRuslan Ermilov.Bd -literal -offset indent 77e66dbdb6SPoul-Henning Kampinterface tunnel 0 78e66dbdb6SPoul-Henning Kampip address 192.168.61.2 255.255.255.252 79e66dbdb6SPoul-Henning Kamptunnel mode nos 80e66dbdb6SPoul-Henning Kamptunnel destination 192.168.59.34 81e66dbdb6SPoul-Henning Kamptunnel source 192.168.56.45 82e66dbdb6SPoul-Henning Kamp.Ed 83*04970b8dSSevan Janiyan.Sh HISTORY 84*04970b8dSSevan JaniyanThe 85*04970b8dSSevan Janiyan.Nm 86*04970b8dSSevan Janiyanutility appeared in 87*04970b8dSSevan Janiyan.Fx 3.0 . 8859edad7aSPhilippe Charnier.Sh AUTHORS 89f4d874a1SRuslan Ermilov.An -nosplit 90bd0891ceSBaptiste Daroussin.An Nickolay N. Dudorov Aq Mt nnd@itfs.nsk.su 9159edad7aSPhilippe Charnierwrote the program, 92bd0891ceSBaptiste Daroussin.An Poul-Henning Kamp Aq Mt phk@FreeBSD.org 9359edad7aSPhilippe Charnierwrote the man-page. 94bd0891ceSBaptiste Daroussin.An Isao SEKI Aq Mt iseki@gongon.com 95d59cf2acSPoul-Henning Kampadded a new flag, IP protocol number. 966087df9eSRuslan Ermilov.Sh BUGS 970227791bSRuslan ErmilovWe do not allow for setting our source address for multihomed machines. 98