Simon Cruickshank wrote:

> 
> My configuration files are :
> 

In the future, please post the output of "shorewall dump" collected as
described at http://www.shorewall.net/support.htm#Guidelines. Those
guidelines go on to say:

        Please DO NOT INCLUDE SHOREWALL CONFIGURATION FILES unless you have     
        specifically asked to do so. The output of shorewall dump collected
        as described above is much more useful.

From what little you have told us it appears that your kernel is behaving
like a 2.6 kernel that doesn't include policy match support or the
IPSEC-Netfilter patches. I haven't kept up with 2.4 kernels in general and
Debian 2.4 kernels in particular so I don't know what features have been
back-ported from 2.6. Here's the log entry that you posted:

> Shorewall:rfc1918:DROP:IN=eth2 OUT=eth0 SRC=2.2.2.1 DST=192.168.20.1
> LEN=48 TOS=0x00 PREC=0x00 TTL=127 ID=802 DP PROTO=TCP SPT=1052 DPT=23
> ...

Note that the IN device is eth2, not ipsec0. Is there even an ipsec0 device
being created when you establish IPSEC SAs with the remote gateway? I rather
doubt it. With a 2.6 kernel with policy match support, decrypted packets
like that are not subject to rfc1918 filtration so that 'norfc1918' may be
safely specified on the external interface -- such is not the case without
policy match support.

You also go on to report that "If I take the norfc1918 out of the interfaces
file I get a similar message but this time caught in the net2loc (policy)
rule". This again suggests that your kernel has PF_KEY-based ipsec (kernel
2.6) support.

Given these hints, I would guess that you need to configure IPSEC as
described at http://www.shorewall.net/IPSEC.htm but that you should follow
the kernel 2.6 instructions rather than the kernel 2.4 instructions.

Thanks,
-Tom
-- 
Tom Eastep    \ Nothing is foolproof to a sufficiently talented fool
Shoreline,     \ http://shorewall.net
Washington USA  \ [EMAIL PROTECTED]
PGP Public Key   \ https://lists.shorewall.net/teastep.pgp.key

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