Thank you for your help.  Not sure that deleting an individual entry
would help as the problem recurred after rebooting.  Now that I had a
better idea where to look I decided to install shorewall-init and that
seems to have fixed the problem.

Thanks

Tony

On 09/02/14 18:25, Tom Eastep wrote:
> On 2/9/2014 8:39 AM, Tony Middleton wrote:
>> I have a small network with a firewall running Debian 7.4.  I have a set
>> of rules as follows
>>
>> DNAT            net     loc:192.168.1.10        tcp     6881
>> DNAT            net     loc:192.168.1.10        udp     6881
>> DNAT            net     loc:192.168.1.10        tcp     7881
>> DNAT            net     loc:192.168.1.10        udp     7881
>> DNAT            net     loc:192.168.1.10        tcp     8881
>> DNAT            net     loc:192.168.1.10        udp     8881
>>
>> Feb  9 16:24:13 hawthorn kernel: [13732.666341]
>> Shorewall:net2fw:DROP:IN=eth1 OUT=
>> MAC=00:05:5d:df:2b:c0:00:30:b8:d1:dd:34:08:00 SRC=105.237.76.28
>> DST=86.16.18.41 LEN=129 TOS=0x00 PREC=0x00 TTL=111 ID=16779 PROTO=UDP
>> SPT=55180 DPT=7881 LEN=109
>>
> This is Shorewall FAQ 1J (http://www.shorewall.org/FAQ.htm#faq1j). There
> is a conntrack entry that was created between the time that eth1 was
> brought up and when Shorewall was started.
>
>
>
> You need to install the 'conntrack' utility and delete the entry.
>
> -Tom
>
>
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