libip6t_REJECT.man revision c2794131b445ebccba184066af6d3fb2f38d1f38 
1This is used to send back an error packet in response to the matched
2packet: otherwise it is equivalent to 
3.B DROP
4so it is a terminating TARGET, ending rule traversal.
5This target is only valid in the
6.BR INPUT ,
7.B FORWARD
8and
9.B OUTPUT
10chains, and user-defined chains which are only called from those
11chains.  The following option controls the nature of the error packet
12returned:
13.TP
14.BI "--reject-with " "type"
15The type given can be
16.nf
17.B " icmp6-no-route"
18.B " no-route"
19.B " icmp6-adm-prohibited"
20.B " adm-prohibited"
21.B " icmp6-addr-unreachable"
22.B " addr-unreach"
23.B " icmp6-port-unreachable"
24.B " port-unreach"
25.fi
26which return the appropriate IPv6-ICMP error message (\fBport-unreach\fP is
27the default). Finally, the option
28.B tcp-reset
29can be used on rules which only match the TCP protocol: this causes a
30TCP RST packet to be sent back.  This is mainly useful for blocking 
31.I ident
32(113/tcp) probes which frequently occur when sending mail to broken mail
33hosts (which won't accept your mail otherwise).
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