tcpdrop(8) [netbsd man page]

TCPDROP(8)						    BSD System Manager's Manual 						TCPDROP(8)

NAME

     tcpdrop -- drop a TCP connection

SYNOPSIS

     tcpdrop laddr lport faddr fport

DESCRIPTION

     The tcpdrop command drops the TCP connection specified by the local address laddr, port lport and the foreign address faddr, port fport.
     Addresses and ports can be specified by name or numeric value.

EXAMPLES

     If a connection to httpd(8) is causing congestion on a network link, one can drop the TCP session in charge:

	   $ fstat | grep 'httpd.*internet.*<--'
	   www	    httpd      21307	3* internet stream tcp 
		   0xd1007ca8 192.168.5.41:80 <-- 192.168.5.1:26747

     The following command will drop the connection:

	   # tcpdrop 192.168.5.41 80 192.168.5.1 26747

SEE ALSO

     fstat(1), netstat(1)

BSD
								   June 23, 2007							       BSD

NOS-TUN(8)						    BSD 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.

BSD
								  April 11, 1998							       BSD