1 This is used to send back an error packet in response to the matched
2 packet: otherwise it is equivalent to
4 so it is a terminating TARGET, ending rule traversal.
5 This target is only valid in the
10 chains, and user-defined chains which are only called from those
11 chains. The following option controls the nature of the error packet
14 \fB\-\-reject\-with\fP \fItype\fP
16 \fBicmp\-net\-unreachable\fP,
17 \fBicmp\-host\-unreachable\fP,
18 \fBicmp\-port\-unreachable\fP,
19 \fBicmp\-proto\-unreachable\fP,
20 \fBicmp\-net\-prohibited\fP,
21 \fBicmp\-host\-prohibited\fP or
22 \fBicmp\-admin\-prohibited\fP (*)
23 which return the appropriate ICMP error message (\fBport\-unreachable\fP is
24 the default). The option
26 can be used on rules which only match the TCP protocol: this causes a
27 TCP RST packet to be sent back. This is mainly useful for blocking
29 (113/tcp) probes which frequently occur when sending mail to broken mail
30 hosts (which won't accept your mail otherwise).
32 (*) Using icmp\-admin\-prohibited with kernels that do not support it will result in a plain DROP instead of REJECT