Re: [SLUG] iptables FORWARD chain

From: Derek Glidden (dglidden@illusionary.com)
Date: Thu Aug 01 2002 - 19:04:18 EDT


On Thu, 2002-08-01 at 18:28, Matt Miller wrote:

> I've tried formulating the rule like this:
>
> iptables -A FORWARD -i eth0 -m multiport -s localnet -d ! localnet -p \
> tcp ! --dports 80,443 -j ACCEPT
>
> Although iptables accepts this as a valid rule (no errors), the
> specified ports are still being forwarded.
>
> Any ideas?

iptables -A FORWARD -i eth0 -s localnet -d ! localnet -p tcp --dport 80
-j DROP
iptables -A FORWARD -i eth0 -s localnet -d ! localnet -p tcp --dport 443
-j DROP
iptables -A FORWARD -i eth0 -s localnet -d ! localnet -p tcp -j ACCEPT

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
#!/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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