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 .BI "--reject-with " "type"
19 .B " icmp6-adm-prohibited"
21 .B " icmp6-addr-unreachable"
23 .B " icmp6-port-unreachable"
26 which return the appropriate ICMPv6 error message (\fBport-unreach\fP is
27 the default). Finally, the option
29 can be used on rules which only match the TCP protocol: this causes a
30 TCP RST packet to be sent back. This is mainly useful for blocking
32 (113/tcp) probes which frequently occur when sending mail to broken mail
33 hosts (which won't accept your mail otherwise).
35 can only be used with kernel versions 2.6.14 or latter.