fair(7) [debian man page]

fair(7) 					       BSD Miscellaneous Information Manual						   fair(7)

NAME

     fair -- simple TCP load balancing service

DESCRIPTION

     fair is a load balancer for TCP connections.  It can be used to distribute incoming connections for SMTP, HTTP or any other TCP service to
     multiple hosts, distributing the load as evenly as possible.

     fair consists of two daemons.  The carrousel is the front-end; it keeps track of back-end hosts and their status, and forwards incoming con-
     nections to the back-ends in such a way that the load is distributed fairly.  The transponder runs on the back-end hosts, it registers with
     the carrousel and sends it status information.  The TCP connections forwarded by the carrousel are not sent to the transponder daemons but
     are sent directly to the desired service running on the back-end host. Both daemons share a single configuration file.

EXAMPLES

     The following example shows how to set up fair to service HTTP connections and to distribute them over back-ends in the 192.168.1.0/24 sub-
     net.

     The configuration file /etc/fair.conf contains the following:

	   WorkerService = http
	   BalancerService = http
	   AllowUDP = ^192.168.1.[0-9]+$

     On www.example.com, the front-end server receiving the incoming HTTP connections, just run:

	   carrousel

     On each of the back-ends run:

	   transponder www.example.com

SEE ALSO

     carrousel(8), transponder(8), fair.conf(5)

Debian GNU/Linux						   June 1, 2019 						  Debian GNU/Linux

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

NAME

     tcpdrop -- drop TCP connections

SYNOPSIS

     tcpdrop local-address local-port foreign-address foreign-port
     tcpdrop [-l] -a

DESCRIPTION

     The tcpdrop command may be used to drop TCP connections from the command line.

     If -a is specified then tcpdrop will attempt to drop all active connections.  The -l flag may be given to list the tcpdrop invocation to drop
     all active connections one at a time.

     If -a is not specified then only the connection between the given local address local-address, port local-port, and the foreign address
     foreign-address, port foreign-port, will be dropped.

     Addresses and ports may be specified by name or numeric value.  Both IPv4 and IPv6 address formats are supported.

     The addresses and ports may be separated by periods or colons instead of spaces.

EXIT STATUS

     The tcpdrop utility exits 0 on success, and >0 if an error occurs.

EXAMPLES

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

	   # sockstat -c | grep httpd
	   www	    httpd      16525 3	tcp4 
		   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

     The following command will drop all connections but those to or from port 22, the port used by sshd(8):

	   # tcpdrop -l -a | grep -vw 22 | sh

SEE ALSO

     netstat(1), sockstat(1)

AUTHORS

     Markus Friedl <markus@openbsd.org>
     Juli Mallett <jmallett@FreeBSD.org>

BSD
								 January 30, 2013							       BSD