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 From:  Michel Servaes <michel at mcmc dot be>
 To:  Monowall User List <m0n0wall at lists dot m0n0 dot ch>
 Subject:  Re: [m0n0wall] WAN download <> LAN upload
 Date:  Mon, 28 Jan 2008 09:40:55 +0100
Yes, it is a router, which I currently only use as Access Point.
It's a Linksys WRV-200, which I disabled DHCP for, and connected LAN to 
the monowall LAN.

I have checked the option to block private ip adresses.

On my LAN2, a DLINK DI-824VUP+ is connected, the same way I hooked up my 
WRV200 on LAN1


thanks for the explanation, I know a bit of IP, but it seems that IP is 
far more than what I know :-D

Fred Wright schreef:
> On Mon, 21 Jan 2008, Michel Servaes wrote:
>
>   
>> Jan 21 22:34:34 gw1 ipmon[112]: 22:34:34.329898 rl0 @0:18 b 10.132.80.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:34:34 gw1 ipmon[112]: 22:34:34.330874 rl0 @0:18 b 10.173.192.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:34:34 gw1 ipmon[112]: 22:34:34.331830 rl0 @0:20 b 172.22.16.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:34:34 gw1 ipmon[112]: 22:34:34.332313 rl0 @0:18 b 10.50.0.1 -> 
>> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> ...
>> Jan 21 22:49:09 gw1 ipmon[112]: 22:49:08.577563 rl0 @0:20 b 172.22.16.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:49:09 gw1 ipmon[112]: 22:49:08.578537 rl0 @0:18 b 10.173.192.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:49:09 gw1 ipmon[112]: 22:49:08.579510 rl0 @0:18 b 10.132.80.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> ...
>> Jan 21 22:53:05 gw1 ipmon[112]: 22:53:05.006321 2x re0 @0:3 b 
>> 172.16.0.254 -> 224.0.0.1 PR igmp len 24 (36) IN low-ttl multicast  **** ???
>> Jan 21 22:53:18 gw1 ipmon[112]: 22:53:18.643674 rl0 @0:18 b 10.50.0.1 -> 
>> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:53:18 gw1 ipmon[112]: 22:53:18.644158 rl0 @0:20 b 172.22.16.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:53:18 gw1 ipmon[112]: 22:53:18.645129 rl0 @0:18 b 10.173.192.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>> Jan 21 22:53:18 gw1 ipmon[112]: 22:53:18.646103 rl0 @0:18 b 10.132.80.1 
>> -> 224.0.0.1 PR igmp len 20 (28) IN low-ttl multicast
>>     
>
> Based on the lengths, I'm pretty sure most of these don't have any IP
> options.  The minimum IGMP payload is 8 octets, so there's no room for
> options in 28.  That says those are is probably IGMPv1, since v2 and v3
> require the RA option.  But the one from 172.16.0.254 looks like it has a
> 4-octet option (and a 12-byte payload), which is consistent with its being
> dropped by rule 0:3.  *That* one is probably v2 or v3, with the RA option.
>
> The expressions like "@0:18" indicate which rule is responsible for
> dropping the packet, as group number and rule number.  If you list the
> actual filter rules with "ipfstat -hnio" (in exec.php), you can see which
> rules these are.
>
> You seem to have multiple neighboring routers using private network
> addresses.  Have you unchecked "block private networks"?
>
>   
>> What is the "2x re0" ???
>>     
>
> I think that means it saw two of the same thing in a row.
>
> 					Fred Wright
>
>
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