RE: Home firewall Hits

["Andreas Freyvogel" <afreyvogel () ecmarket com>]

check this out, might help:

http://www.robertgraham.com/pubs/firewall-seen.html


Cheers,
-Andreas


-----Original Message-----
From:
security-basics-return-24881-afreyvogel=ecmarket.com () securityfocus com
[mailto:security-basics-return-24881-afreyvogel=ecmarket.com@securityfoc
us.com]On Behalf Of Tijl DULLERS
Sent: Tuesday, November 04, 2003 2:29 AM
To: Preston Tony
Cc: 'security-basics () securityfocus com'
Subject: Re: Home firewall Hits


Hi,

Port 162 UDP = SNMP traps.
Dit you configure your wireless router to send SNMTP traps to your
workstation PC ?
Or do you have SNMP enabled on the Wireless router at all ?



Preston, Tony wrote:

> I am hoping someone here can explain what I am seeing on my home network.
> I use Kerio's tiny personal firewall and Windows ME.  I have everything up
> to date with the latest patches.
>
> This is my home network and something strange is happening.  The
> configurations is
>
>
>  [cable modem] <----> [ Linksys Wireless Router] ~~~ [ Windows ME W/
> firewall ]
>
>
> From reading the firewall log, I would think that my router is continuously
> hitting
> Port 162  with a UDP message.  The odd thing is that it is doing this by
> using an
> incrementing port from  192.168.1.1, I see many of these every day, it is
> continuous.
>
> I have the latest firmware from linksys, the firewall is rejecting all the
> packets.
>
> While I am an experienced programmer, I do not have alot of network
> experience, probably
> I would classify myself as knowing enough to be dangerous...:)
>
> The activity is at a moderate rate from a couple per second to one every 20
> seconds.  If it
> is some sort of attack attempt it is using a randomized delay between
> packets.
>
> Here is a summary of the hits.
>
> [30/Oct/2003 23:53:48] Rule 'Packet to unopened port received': Blocked: In
> UDP,
>  192.168.1.1:40826->localhost:162, Owner: no owner
>      thru
>  192.168.1.1:40899->localhost:162, Owner: no owner
>
>
> I do see other "hits" which are much less frequent which are an occasional
> hit here or
> there, I am not as concerned about these, but would be curious if anyone
has
> ideas about
> why they occur.   The first one, I might see one or two a day.   The second
> one would
> show up in sets of 5-10, maybe a couple of times a day.
>
> [30/Oct/2003 23:53:56] Rule 'TCP ack packet attack': Blocked: In TCP,
> 207.46.197.121:80->localhost:1452, Owner: no owner
>
> [31/Oct/2003 00:00:02] Rule 'Packet to unopened port received': Blocked: In
> UDP,
> 0.0.0.0:68->localhost:67, Owner: no owner
>
> Anything here I should be concerned with??
>
> I am hoping someone here can explain what I am seeing on my home network.
> I use Kerio's tiny personal firewall and Windows ME.  I have everything up
> to date with the latest patches.
>
> The configurations is:
>
>  [cable modem] <----> [ Linksys Wireless Router] ~~~ [ Windows ME W/
> firewall ]
>
>
> From reading the firewall log, I would think that my router is continuously
> hitting
> Port 162  with a UDP message.  The odd thing is that it is doing this by
> using an
> incrementing port from  192.168.1.1, I see many of these every day, it is
> continuous.
>
> I have the latest firmware from linksys, the firewall is rejecting all the
> packets.
>
> While I am an experienced programmer, I do not have alot of network
> experience, probably
> I would classify myself as knowing enough to be dangerous...:)
>
> The activity is at a moderate rate from a couple per second to one every 20
> seconds.  If it
> is some sort of attack attempt it is using a randomized delay between
> packets.
>
> Here is a summary of the hits.
>
> [30/Oct/2003 23:53:48] Rule 'Packet to unopened port received': Blocked: In
> UDP,
>  192.168.1.1:40826->localhost:162, Owner: no owner
>      thru
>  192.168.1.1:40899->localhost:162, Owner: no owner
>
>
> I do see other "hits" which are much less frequent which are an occasional
> hit here or
> there, I am not as concerned about these, but would be curious if anyone
has
> ideas about
> why they occur.   The first one, I might see one or two a day.   The second
> one would
> show up in sets of 5-10, maybe a couple of times a day.
>
> [30/Oct/2003 23:53:56] Rule 'TCP ack packet attack': Blocked: In TCP,
> 207.46.197.121:80->localhost:1452, Owner: no owner
>
> [31/Oct/2003 00:00:02] Rule 'Packet to unopened port received': Blocked: In
> UDP,
> 0.0.0.0:68->localhost:67, Owner: no owner
>
> Anything here I should be concerned with??
>
>
>
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The Presidio integrates PGP data encryption and XML Web Services security to 
simplify the management and deployment of PGP and reduce overall PGP costs 
by up to 80%.
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