Re: FW-1 "allow outbound"

From: dwelchat_private
Date: Wed Jan 26 2000 - 00:23:48 PST

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    On Tue, 18 January 2000, "Cannella, Michael (ISS Southfield)" wrote:
    
    > >A question for the list while I am on the subject of FW-1. Does anybody
    > know why the
    > >'Allow outbound connections' property has to be set on FW-1/NT for the fw
    > to pass any
    > >traffic? In my experience this property has the advertised effect on the
    > Solaris
    > >platform but will stop all traffic dead in the water if not enabled on the
    > NT platform. 
    >
    > I have seen the same behavior difference between Solaris and NT, but only
    > with http.  With telnet, for example, both seem to behave the same way.  And
    > I have no explanation for why that occurs, although, for once, it's NT that
    > exhibits the safer behavior.
    
    If the HTTP Security Server is involved (i.e. if there's a HTTP resource or User Authentication), I can imagine the behaviour being slightly different. 
    
    > This problem is quite apropos your comment about the (ahem) "limitations" of
    > the Checkpoint docs, which are somewhat misleading:
    > 
    > - the policy property help expressly indicates that the "allow outgoing"
    > checkbox does not apply to traffic from the internal network.
    > 
    > - the help for "outgoing connections" says--a bit more accurately--that
    > traffic will only be allowed out from the firewall if either
    > 
    >     *  "allow outgoing" is checked
    > or
    >     *  interface direction is set to "eitherbound," and there is a rule that
    > allows the
    >        traffic out.
    
    You can also get in trouble if you have some rules installed on gateways, some some rules installed on specific target (FireWall-1 treats these rules as eitherbound), and interface direction is set to "inbound." 
    
    --
    Dameon D. Welch, a.k.a. PhoneBoy (dwelchat_private)
    Check Point FireWall-1 FAQs at http://www.phoneboy.com/fw1/
    The views expressed herein are not necessarily those of anyone else.
    --
    Signup for your free USWEST.mail Email account http://www.uswestmail.net
    



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