Firewall-1

Re: [FW-1] drops on rule 995 for port 135?

Subject: Re: [FW-1] drops on rule 995 for port 135?
From: Martin Benuska <martin.benuska AT GMAIL DOT COM>
To: FW-1-MAILINGLIST AT AMADEUS.US.CHECKPOINT DOT COM
Date: Thu, 21 Apr 2005 09:43:58 +0200
Hello,

Rule number 995 means that you had a bind/alter-context request with more
than one UUID in it.
We don't allow it by default as it been used on some attacks
but there is an inspect flag that allows it (and keep the security).

In $FWDIR/lib/dcerpc.def there is a flag

#define NO_ENFORCE_CNTX_NUM 0

That should be changed to

#define NO_ENFORCE_CNTX_NUM 1 

Regards.


On 4/20/05, Covington, Chris <ccovington AT plusone DOT com> wrote:
> 
> Hi all,
> 
> I've been killing myself researching an Active Directory replication
> problem and it turns out that FW-1 is the culprit:
> 
> Number: 7770
> Date: 20Apr2005
> Time: 13:43:18
> Product: VPN-1 & FireWall-1
> Interface: eth1
> Origin: fw1 (x.x.x.x)
> Type: Alert
> Action: Reject
> Protocol: tcp
> Service: 135
> Source: zor (10.20.6.3 <http://10.20.6.3>)
> Destination: saturn.plusone.com <http://saturn.plusone.com> 
> (10.0.2.5<http://10.0.2.5>
> )
> Rule: 995
> Source Port: 2853
> 
> Does anyone know how to allow this traffic to pass? What is rule 995
> anyway?
> 
> thanks
> ---
> Chris Covington
> IT
> Plus One Health Management
> 75 Maiden Lane Suite 801
> NY, NY 10038
> 646-312-6269
> http://www.plusoneactive.com
> 
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