Re: [leaf-user] Re: re sh-httpd perm Bug

2002-07-30 Thread Eric Wolzak

 Of course weblet is still doing something I consider wrong -- it's saying
 the firewall is in red light / ERROR mode just because it has 251 denied
 or rejected packets.  Isn't this the whole point of a firewall, to deny and
 reject those packets?  How is this an ERROR?  At worst, it should be at
 yellow alert.
This depends on what you log and in what environment you are.
On some of my internal boxes 251 would be a whole lot :) 

You can change the settings for your individual system in 
3) Packages configuration  
Weblet

2) LRP web page configuration


# Warning/Error thresholds for the weblet utility
# Disable checking of any value by setting it to -1

# Firewall thresholds: deny/reject messages
WRN_FW=5
ERR_FW=50

WRN_FW is the number of logged packets after which the color 
changes to yellow

ERR_FW is the number of logged packets to change to red


 Dan Harkless
 [EMAIL PROTECTED]
 http://harkless.org/dan/
 
Eric Wolzak
member of the bering Crew
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Re: [leaf-user] Re: re sh-httpd perm Bug

2002-07-30 Thread Julian Church

Hi Dan

At 00:07 30/07/02 -0700, Dan Harkless wrote:

Of course weblet is still doing something I consider wrong -- it's saying
the firewall is in red light / ERROR mode just because it has 251 denied
or rejected packets.  Isn't this the whole point of a firewall, to deny and
reject those packets?  How is this an ERROR?  At worst, it should be at
yellow alert.

It's possible to adjust this behaviour by changing the weblet's 
OK/warning/error thresholds.  I see you've got some advice on that already.

There's also the possibility that the bulk of those packets are from one or 
two harmless sources that you don't really need to worry about - it's 
common for cable/ADSL systems to spew forth all sorts of stuff of this 
type.  If this is the case it might be helpful to fiddle with your firewall 
rules so these things don't get logged in the first place.

I'd be inclined to do the latter, mainly because I only really want stuff 
that I have to think about in my logs and I find a lot of extra rows of 
harmless activity often make more important entries difficult to spot, but 
it's your firewall - you should do whichever you want.

cheers

Julian

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www.ljchurch.co.uk



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Re: [leaf-user] Re: re sh-httpd perm Bug

2002-07-30 Thread Dan Harkless


Eric Wolzak [EMAIL PROTECTED] writes:
  Of course weblet is still doing something I consider wrong -- it's saying
  the firewall is in red light / ERROR mode just because it has 251 denied
  or rejected packets.  Isn't this the whole point of a firewall, to deny and
  reject those packets?  How is this an ERROR?  At worst, it should be at
  yellow alert.
 This depends on what you log and in what environment you are.
 On some of my internal boxes 251 would be a whole lot :) 

Right, but I'm sure the vast majority of LEAF installations are exposed to
the Internet, not sequestered on some internal network.

 You can change the settings for your individual system in 
 3) Packages configuration  
 Weblet
 
 2) LRP web page configuration
 
 
 # Warning/Error thresholds for the weblet utility
 # Disable checking of any value by setting it to -1
 
 # Firewall thresholds: deny/reject messages
 WRN_FW=5
 ERR_FW=50
 
 WRN_FW is the number of logged packets after which the color 
 changes to yellow
 
 ERR_FW is the number of logged packets to change to red

Thanks, I hadn't noticed those parameters.  The default values do seem
unreasonably low, if most people are using LEAF on the Internet.

But I guess I don't really agree with the design philosophy in general.  How
many packets on an Internet-facing firewall is the right number to be
considered an ERROR?

To me, going to red-light mode just because there are a lot (however you
define a lot) of denied and rejected packets means that you're crying
wolf, and conditions people not to click on the red light to find out what's
wrong.  I think the ERROR case should be saved for when things are
seriously wrong, like the firewall is failing to process packets, or all
rules have been cleared, or things of that nature.

Again, I'm perfectly happy with the use of the yellow light to indicate a
high number of denied/rejected packets, just not with the use of the red
light to indicate even more of them.

--
Dan Harkless
[EMAIL PROTECTED]
http://harkless.org/dan/


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Re: [leaf-user] Re: re sh-httpd perm Bug

2002-07-30 Thread Dan Harkless


Julian Church [EMAIL PROTECTED] writes:
 There's also the possibility that the bulk of those packets are from one or 
 two harmless sources that you don't really need to worry about - it's 
 common for cable/ADSL systems to spew forth all sorts of stuff of this 
 type.  If this is the case it might be helpful to fiddle with your firewall 
 rules so these things don't get logged in the first place.

I believe my ADSL provider is quite clean as far as unnecessary packet
spewage goes (and I know my ISP is), but I'll check again.

 I'd be inclined to do the latter, mainly because I only really want stuff 
 that I have to think about in my logs and I find a lot of extra rows of 
 harmless activity often make more important entries difficult to spot, but 
 it's your firewall - you should do whichever you want.

I don't think this applies in my case, but it's a good point to bring up --
thanks.

--
Dan Harkless
[EMAIL PROTECTED]
http://harkless.org/dan/


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