On Tue, 16 Sep 2003, Ray Olszewski wrote:

> Matt (and Tom) --
>
> I'm perhaps a bit hazy on my RFC1918 rules, but the Shorewall list I see
> Matt reporting includes a lot of Class A blocks that I did not know were
> part of the RFC1918 exclusions. One of them is what is catching the example
> packet Matt posts.
>
> The example packet is:
>
> Sep 16 09:12:31 hub kernel: Shorewall:rfc1918:DROP:IN=eth0 OUT=eth1
> SRC=82.82.76.144 DST=10.2.3.4 LEN=48 TOS=0x00 PREC=0x00 TTL=109 ID=29083
> DF PROTO=TCP SPT=4535 DPT=6885 WINDOW=30370 RES=0x00 SYN URGP=0
>
> The rule that catches it is this one, which matches the *source* address:
>
> 209 11072 logdrop    ah   --  *      *       82.0.0.0/7           0.0.0.0/0
>

The 'norfc1918' option also requests from unallocated address blocks. If
you don't upgrade your Shorewall version for 9-10 months, you get this
sort of problem.

-Tom
--
Tom Eastep    \ Shorewall - iptables made easy
Shoreline,     \ http://shorewall.net
Washington USA  \ [EMAIL PROTECTED]


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