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Special Forums IP Networking iptables: syntax from drop AND log packets Post 302508481 by pludi on Monday 28th of March 2011 09:00:40 AM
Old 03-28-2011
Yes, you always need 2 different rules. However, you can create a new chain (eg log-and-drop) that contains those 2 rules, and have your regular chains jump there if needed.
Code:
iptables -N log-and-drop # create new chain
iptables -A log-and-drop -j LOG --log-prefix 'SWAMP-THING'--log-level 4
iptables -A log-and-drop -J DROP

iptables -A INPUT -s 10.1.1.115 -j log-and-drop

You might also want to limit the number of log messages by using the (aptly named) limit module (described here), lest someone DoS' your server by filling the log file.
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IPTABLES-SAVE(8)						  iptables 1.6.1						  IPTABLES-SAVE(8)

NAME
iptables-save -- dump iptables rules to stdout ip6tables-save -- dump iptables rules to stdout SYNOPSIS
iptables-save [-M modprobe] [-c] [-t table] ip6tables-save [-M modprobe] [-c] [-t table] DESCRIPTION
iptables-save and ip6tables-save are used to dump the contents of IP or IPv6 Table in easily parseable format to STDOUT. Use I/O-redirect- ion provided by your shell to write to a file. -M, --modprobe modprobe_program Specify the path to the modprobe program. By default, iptables-save will inspect /proc/sys/kernel/modprobe to determine the exe- cutable's path. -c, --counters include the current values of all packet and byte counters in the output -t, --table tablename restrict output to only one table. If not specified, output includes all available tables. BUGS
None known as of iptables-1.2.1 release AUTHORS
Harald Welte <laforge@gnumonks.org> Rusty Russell <rusty@rustcorp.com.au> Andras Kis-Szabo <kisza@sch.bme.hu> contributed ip6tables-save. SEE ALSO
iptables-apply(8),iptables-restore(8), iptables(8) The iptables-HOWTO, which details more iptables usage, the NAT-HOWTO, which details NAT, and the netfilter-hacking-HOWTO which details the internals. iptables 1.6.1 IPTABLES-SAVE(8)
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