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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 connec- tions. 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
NAME | SYNOPSIS | DESCRIPTION | EXIT STATUS | EXAMPLES | SEE ALSO | AUTHORS
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