| TCPDROP(8) | System Manager's Manual | TCPDROP(8) |
tcpdrop — drop a
TCP connection
tcpdrop |
local-addr local-port remote-addr remote-port |
The tcpdrop command drops the TCP
connection specified by the local address local-addr,
port local-port and the foreign address
remote-addr, port remote-port.
Addresses and ports can be specified by name or numeric value.
To simplify dropping TCP connections using the output of
fstat(1) and
netstat(1),
tcpdrop also supports a two-argument form where the
address and port are separated by a colon (‘:’) or dot
(‘.’) character.
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
Either of the following commands will drop the connection:
# tcpdrop 192.168.5.41 80 192.168.5.1 26747 # tcpdrop 192.168.5.41:80 192.168.5.1:26747 # tcpdrop 192.168.5.41.80 192.168.5.1.26747
The tcpdrop program first appeared in
OpenBSD 3.6.
The tcpdrop program was written by
Markus Friedl
<markus@openbsd.org>.
| February 6, 2023 | openbsd |