Re: [SLUG] iptables packet drop logging

From: Derek Glidden (dglidden@illusionary.com)
Date: Mon Jul 02 2001 - 10:59:00 EDT


"Brian S. Armstrong" wrote:
>
> Is there any way to get iptables to log the DROP packets to
> /var/log/messages the same way iptables does with the DENY packets?

iptables -A FORWARD -p tcp -p 25 -j LOG --log-prefix "DROP: "
--log-level info
iptables -A FORWARD -p tcp -p 25 -j DROP

just make sure you match the same set of parameters for both your LOG
and DROP rules and you accomplish what you're looking for. It looks
redundant but is more flexible than the old "-l" option.

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#!/usr/bin/perl -w
$_='while(read+STDIN,$_,2048){$a=29;$b=73;$c=142;$t=255;@t=map
{$_%16or$t^=$c^=($m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;
$t^=(72,@z=(64,72,$a^=12*($_%16-2?0:$m&17)),$b^=$_%64?12:0,@z)
[$_%8]}(16..271);if((@a=unx"C*",$_)[20]&48){$h=5;$_=unxb24,join
"",@b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;$d=
unxV,xb25,$_;$e=256|(ord$b[4])<<9|ord$b[3];$d=$d>>8^($f=$t&($d
>>12^$d>>4^$d^$d/8))<<17,$e=$e>>8^($t&($g=($q=$e>>14&7^$e)^$q*
8^$q<<6))<<9,$_=$t[$_]^(($h>>=8)+=$f+(~$g&$t))for@a[128..$#a]}
print+x"C*",@a}';s/x/pack+/g;eval 

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