Hi,

Have you tried creating a new service for tcp/135 called dcomm (or
something) and re-compiling your policy.

I had this problem a while ago - but can't remember if it was on R54 or R55

Regards,
Dave

-----Original Message-----
From: Mailing list for discussion of Firewall-1
[mailto:[EMAIL PROTECTED] On Behalf Of Didier
PARIS
Sent: 19 October 2005 08:33
To: [email protected]
Subject: Re: [FW-1] How-to accept RPC DCOM?
Importance: High

Hi,

No. Even if we open source, destination, any service it doesn't work.
There is a SYN-ACK without SYN reject. This behaviour could be related to
the virus using RPC DCOM. So it sems for me that there is somewhere in the
implied rules, some special analysis about DCOM communication, which brings
the firewall to reject any DCOM flow. The problem is that in the R54 it is
not clear.
I have seen on the forum that some people using R55 have got the same
problem but in this version they can disable this rule (998 or something
like that) in the list of implied rule. In the R54, i can't see it. And
furthermore, I have never found the R54 to R55 upgrade software.
So I am stuck on this point.

Didier


> -----Message d'origine-----
> De : Mailing list for discussion of Firewall-1 
> [mailto:[EMAIL PROTECTED] la part de Joe 
> Matusiewicz Envoye : mardi 18 octobre 2005 16:47 A : 
> [email protected]
> Objet : Re: [FW-1] How-to accept RPC DCOM?
>
>
> At 09:25 AM 10/18/2005, Didier PARIS wrote:
> >Hi All,
> >
> >We have a Firewall Checkpoint NG AI R54 on a Windows 2000 server SP4.
> >We would like to accept communication RPC DCOM communication between 
> >two internal VLANs (I know about the risk to accept such flow). It 
> >seems that this is not authorized in the firewall implicit rules.
> >Is it possible to modify the behaviour of the firewall on this 
> >particular point? And if yes, how to do that?
>
>
> I don't know about implicit rules but wouldn't opening up the ports 
> RPC-DCOM uses take care of this?  I'm talking about TCP 135, 139, 443, 
> and 593.  If this doesn't cover it you can always look for drops in 
> your logs and adjust accordingly.
>
> -- Joe
>
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