iptables: syntax from drop AND log packets Post: 302508476

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Special Forums IP Networking iptables: syntax from drop AND log packets Post 302508476 by putter1900 on Monday 28th of March 2011 08:51:16 AM

03-28-2011

Registered User

iptables: syntax from drop AND log packets

Good afternoon everyone,
It's the iptables n00b again. valiantly learning and reading (and asking for occasional help when I hit a wall - which I think I just did)

So far I've gotten logging enabled for iptables.

Now, I want to drop AND log an IP connection attempt.

Could some wise eyes please confirm that to drop - AND LOG - an IP there are not one, but two rules which must be stuffed in there?

Let's say I want to prevent connections from 10.1.1.115 and log the attempt. The reading I've done so far seems to say I must do this:

Code:

iptables -A INPUT -s 10.1.1.115 -j LOG --log-prefix 'SWAMP-THING'--log-level 4 #or 7 maybe? I just need date/time/IP

iptables -A INPUT -s 10.1.1.115 -j DROP

I'm guessing there's no way to combine the two into a single command (which for brevity, I could maybe alias somehow?)

Regards & TIA for any suggestions and pointers (and expertise)

putter

putter1900

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ip6tables-save

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)