Security Basics mailing list archives

RE: Unrestricted Outbound Web Server Access Opinion


From: "Hamish Stanaway" <koremeltdown () hotmail com>
Date: Wed, 04 May 2005 09:51:16 +0000

Hi there Paul,

Another reason you might not want to do this is because if you had no restrictions on outbound connections a worm infection might cause your infected server(s) to end up on blacklists, effectivly cutting your servers reach... meaning some people may consider your machine "bad". If you continued restrictions, hopefully this would never happen. Having no restrictions on outbound connections on a T1 is just asking for trouble.



Kindest of regards,

Hamish Stanaway, CEO

Absolute Web Hosting / -= KoRe WoRkS =- Internet Security
Auckland, New Zealand

http://www.webhosting.net.nz
http://www.buywebhosting.co.nz
http://www.koreworks.com




From: "Paul Guibord" <pguibord () tngtech net>
To: <security-basics () securityfocus com>
Subject: Unrestricted Outbound Web Server Access Opinion
Date: Tue, 3 May 2005 08:54:57 -0400
MIME-Version: 1.0
Received: from outgoing.securityfocus.com ([205.206.231.27]) by mc7-f34.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Tue, 3 May 2005 17:27:02 -0700 Received: from outgoing.securityfocus.com by outgoing.securityfocus.com via smtpd (for mc7.bay6.hotmail.com [65.54.253.99]) with ESMTP; Tue, 3 May 2005 17:26:49 -0700 Received: from lists.securityfocus.com (lists.securityfocus.com [205.206.231.19])by outgoing3.securityfocus.com (Postfix) with QMQPid 3E6B8237346; Tue, 3 May 2005 17:41:32 -0600 (MDT)
Received: (qmail 24629 invoked from network); 3 May 2005 13:22:53 -0000
X-Message-Info: 6sSXyD95QpVjocF6boLwVQrxxioEG/C7OhezxW0vqCA=
Mailing-List: contact security-basics-help () securityfocus com; run by ezmlm
Precedence: bulk
List-Id: <security-basics.list-id.securityfocus.com>
List-Post: <mailto:security-basics () securityfocus com>
List-Help: <mailto:security-basics-help () securityfocus com>
List-Unsubscribe: <mailto:security-basics-unsubscribe () securityfocus com>
List-Subscribe: <mailto:security-basics-subscribe () securityfocus com>
Delivered-To: mailing list security-basics () securityfocus com
Delivered-To: moderator for security-basics () securityfocus com
Content-Class: urn:content-classes:message
X-MimeOLE: Produced By Microsoft Exchange V6.0.6375.0
X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: Unrestricted Outbound Web Server Access Opinion
thread-index: AcVP3sPFIFTQYY1uTIW4rifehaq72wAAHEvw
Return-Path: security-basics-return-33848-koremeltdown=hotmail.com () securityfocus com X-OriginalArrivalTime: 04 May 2005 00:27:02.0391 (UTC) FILETIME=[FDF6F870:01C5503F]


Hello All,

Someone within our company wants our Internet facing web servers to have
unrestricted outbound access. Port 80 is the only port permitted from
the outside coming in. I need the experts opinion why we do not want to
permit this PLEASE. Two things I could think of are if the web servers
were compromised, then the hacker would have the ability offload any
data they want. Another being if they were infected with a worm they
would bring down the Internet T1 in their attempt to find other devices
to infect.

Thanks in advance for everyone's input.

Paul



Current thread: