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[	1	]	ISA Server News
[	9	]	Blogs
[	4	]	Articles
[	4	]	Site News
[	17	]	Tutorials
[	1	]	White Papers
[	4	]	Software Titles

ISA Server News top

Nov 27th, 2006 - Using Active PORT Mode FTP Programs from Behind the ISA Firewall
A number of people have had problems with connecting to FTP sites using Active Mode when behind the ISA Firewall. The problem is mostly seen when the Firewall client is installed, the Enable folder view for FTP sites is enabled in Internet Explorer and the Use Passive FTP checkbox is not selected in Internet Explorer

Blogs top

May 15th, 2008 - Web Proxy Clients Running IE 7 Fail to Open FTP Sites
A few people have mentioned to me recently that they've been having problems with opening FTP sites using IE 7 when their computers are configured as Web Proxy clients. The problem happens when the users need to log on to an FTP site to gain access
Jan 4th, 2008 - Web proxy clients cannot download from an FTP server using PASV mode
Symptom: Attempts by Web proxy clients to download from a PASV mode FTP server fail. Issue: By default, FTP traffic handled by Web Proxy Filter uses Active mode. Solution: Set the DWORD value NonPassiveFTPTransfer to 0 in the registry on the ISA Server computer, which sets the mode to Passive. The default value is 1, indicating that Active mode is used
Aug 17th, 2007 - Active mode FTP client programs cannot access an FTP server from behind Internet Security and Acceleration Server 2004
Troubleshooting FTP access problems leave many ISA Firewall admins bald from tearing their hair out trying to find a solution. Here's a great KB article on a specific cause of FTP problems related to the Firewall client. Check it out at: http://support.microsoft.com/kb/884580/en-us HTH, Tom Thomas W Shinder, M.D. Site: www.isaserver.org Blog: http://blogs.isaserver.org/shinder/Book: http://tinyurl.com/3xqb7 Email: tshinder@isaserver.org MVP — Microsoft Firewalls (ISA)
May 18th, 2007 - How to access an FTP site that requires authentication using Internet Explorer
The Web proxy client doesn't allow you to authenticate with FTP servers. Even if you see that little log on dialog pop up, it's not going to work. What you need to do is: 1. Configure Internet Explorer to enable the Enable folder view for FTP sites in the Advanced tab of the Internet Options dialog box 2
May 18th, 2007 - Fix FTP Download Problems through the ISA Firewall with a Registry Edit
By default, the ISA Firewall sends PORT mode FTP requests from Web proxy clients. If you find that your Web proxy clients can't download over FTP, but you can download using the command line FTP client, then what you need to do is configure the Registry so that the ISA Firewall sends out a PASV mode request instead of a PORT mode request
Nov 9th, 2006 - About the Microsoft commandline FTP Client
As already said in many articles, blogs and forum messages, the Microsoft command-line FTP client does *not* support FTP passive mode. Therefore, as mentioned in my blog About the FTP Protocol Support in ISA Server, I use the free Standard Networks command-line FTP client MoveIt Freely to test out FTP passive mode
Oct 27th, 2006 - ISA Firewall Question of the Day Blocking FTP Connections
QUESTION: Tom, We have ISA Server 2004 configured as a "back end" firewall, our front end is a Cisco PIX. We have no problems blocking Web access (port 80 and 443) based upon Windows userids.However when we try to block users from FTP it always fails and allows FTP access. We have tried allow rules and deny rules but nothing seems to work. The only way we found to block FTP was with Microsoft's new browser IE 7
Oct 8th, 2006 - Solving the Secure FTP dilemma with ISA Server 2004 and 2006
When you have to support the Secure FTP protocol (aka FTPS or FTP over SSL/TLS) with ISA Server 2000 you have to take some tough decisions, especially if you have to allow Explicit Security
May 15th, 2006 - About the FTP Protocol Support in ISA Server
In my article How the FTP protocol Challenges Firewall Security I explain thoroughly how the FTP protocol works and how ISA server supports the FTP protocol. Although that article was written with ISA 2000 in mind, most of the stuff is still valid for ISA 2004, especially the behavior of the different ISA client types. It is crucial that you make yourself familiar with the three different ISA client types and how they interact with the ISA server

Articles top

The ISA 2004 Firewall ISP Co-location Configuration: Date - Jul 18, 2004; Author - Thomas Shinder; Section - Articles; One of the more unusual configuration options for the ISA firewall is what I call the "ISP co-location" configuration. I wrote about this configuration for the ISA Server 2000 firewall in an article Configuring an ISP Co-located Web/SMTP/ISA Server. I called this an ISP co-location configuration because in an ISP co-lo environment you typically don’t have the option to install a server with multiple interfaces. So, if you want to run your ISP co-located Web, FTP and SMTP server, you need to do it with a single NIC. Check out this article for how to create the single NIC colo config with your ISA 2004 firewall.
How the FTP protocol Challenges Firewall Security: Date - Nov 01, 2002; Author - Stefaan Pouseele; Section - Articles; In this article I discuss the FTP protocol and how it works with Firewalls in general, and ISA Server in particular. If you're having problems with inbound or outbound FTP, check this out before moving on to the next step.
Securing FTP with TLS: Date - Nov 01, 2002; Author - Stefaan Pouseele; Section - Articles; Reprint of the IETF document "draft-murray-auth-ftp-ssl-09.txt"
FTP/TLS Friendly Firewalls: Date - Nov 01, 2002; Author - Stefaan Pouseele; Section - Articles; Reprint of the IETF document "draft-fordh-ftp-ssl-firewall-01.txt"

Site News top

GFI DownloadSecurity to support Microsoft ISA Server 2004: Date - Mar 15, 2004; Author - GFI Software; Section - Site News; GFI announced that it will release an update to GFI DownloadSecurity for ISA Server 6 to support the ISA Server 2004. GFI DownloadSecurity is a content security product that handles the security risk of file downloads without resorting to blocking them all at firewall level. It content checks downloaded files for malicious content and viruses, and enables administrators to assert control over what files users download from HTTP and FTP sites.
Add an extra antivirus engine to ISA for free! - GFI releases GFI DownloadSecurity Freeware: Date - Oct 22, 2003; Author - GFI Software; Section - Site News; In line with its efforts to promote network security, GFI has released a freeware version of GFI DownloadSecurity for ISA Server 6, its content security product that handles the security risk of file downloads without resorting to blocking them all at firewall level. The freeware version scans HTTP and FTP downloads at the network perimeter using a single anti-virus engine, and can be used as additional protection by companies who do not yet perform virus scanning at firewall level.
GFI releases DownloadSecurity for ISA Server 6 – Includes Trojan and executable analyzer: Date - Sep 01, 2003; Author - The Editor; Section - Site News; GFI today announced the release of GFI DownloadSecurity for ISA Server 6, a content security product that handles the security risk of file downloads without resorting to blocking them all at firewall level. GFI DownloadSecurity content checks downloaded files for malicious content and viruses, and enables administrators to assert control over what files users download from HTTP and FTP sites. Version 6 includes many key features, the most significant of which is a new Trojan and executable scanner.
GFI launches GFI DownloadSecurity for ISA Server, an HTTP/FTP content security product: Date - Oct 30, 2002; Author - GFI Software; Section - Site News; Admins can now block malicious & virus-infected HTTP/FTP file downloads at firewall level.

Tutorials top

Microsoft Forefront TMG – FTP and FTP Server publishing: Date - Nov 17, 2009; Author - Marc Grote; Section - Tutorials / Configuration - Security; How to allow FTP server traffic through TMG Server for outbound connections through Firewall rules and for incoming connections through TMG server publishing rules.
Microsoft ISA Server 2006 - Secure FTP Server (FTPS) publishing with Windows Server 2008: Date - Oct 13, 2009; Author - Marc Grote; Section - Tutorials / Configuration - Security; How to securely publish an FTP Server running on Windows Server 2008 R2 with ISA Server 2006.
Enabling Secure FTP Access Through ISA 2006 Firewalls (Part 2): Date - Feb 17, 2009; Author - Tom Decaluwe; Section - Tutorials / Configuration - Security; What you need to do to enable data transfer over the secure FTP link.
Enabling Secure FTP Access Through ISA 2006 Firewalls (Part 1): Date - Feb 03, 2009; Author - Tom Decaluwe; Section - Tutorials / Configuration - Security; Demonstrating a problem with secure FTP server publishing using the ISA 2006 firewall.
Creating a Web Access Policy using the Forefront Threat Management Gateway (TMG) Beta 1 (Part 1): Date - May 27, 2008; Author - Thomas Shinder; Section - Tutorials / Configuration - General; How to create a Web Access Policy to allow outbound HTTP, HTTPS and Web proxy forwarded FTP connections to the Internet, with TMG Beta 1.
Publishing Secure FTP Servers behind ISA Firewalls: Date - Jun 02, 2005; Author - Alex Wang; Section - Tutorials / Configuration - General; This article discusses how to create a PASV mode FTP server or a secure FTP server which is behind ISA Server 2004.
Publishing FTP Sites with an Alternate Port using ISA Server 2004 Firewalls: Date - Feb 19, 2004; Author - Thomas Shinder; Section - Tutorials / Configuration - General; One of the most common requests seen on the Web boards here at www.isaserver.org is for instructions on how to publish an FTP site on an alternate port. There are a number of reasons why someone might want to publish an FTP site on an alternate port. Some ISA admins feel that they’ll benefit from a measure of security through obscurity. Other ISA admins, believe it or not, actually want to publish an FTP site on an alternate port in order to violate their ISP’s Terms of Service policy. Regardless of the reason, this article will show you how to do it with ISA 2004 firewalls.
Fixing Common Web Publishing Problems -- Part 2: Date - Nov 26, 2002; Author - Thomas Shinder; Section - Tutorials / Publishing; Web Publishing Rules allow you to make Web and FTP Servers on the internal network accessible to external network users. Most of the time they work right out of the box, but there are some situations that can cause your Web Publishing Rules to not work exactly how you want them to. Check out this second part of Tom's two part article on fixing common Web publishing problems and get those Web Publishing Rules running smoothly again.
Publishing Multiple Web Sites using Web Publishing Rules: Date - Nov 15, 2002; Author - Thomas Shinder; Section - Tutorials / Publishing; Are you stuck with one or just a few IP addresses for your ISA Server's external interface? Want to publish dozens of Web and FTP sites on your internal network with just a single IP address on your external interface? No problem! Check out this article and find out how.
Using Web Publishing Rules to Publish Co-located Web and FTP Servers: Date - Nov 03, 2002; Author - Thomas Shinder; Section - Tutorials / Publishing; Want to publish a Web and FTP site co-located on an internal nework server? Want to use Web Publishing Rules to do this? What if you only have a single public IP address? No problem! Read this article and find out how to publish Web and FTP sites using Web Publishing Rules.

White Papers top

Content Filtering.: Date - Jul 06, 2001; Author - The Editor; Section - White Papers; This white paper examines the security threats facing companies due to viruses that can be contracted through web browsing and HTTP and FTP downloads. The paper explains why it is important it is to scan corporate web browsing and downloads at ISA Server level and describes how LANguard, which is built on ISA Server, does this.

Software Titles top

Kaspersky Anti-Virus for Microsoft ISA Server: Date - Jul 01, 2010; Section - Anti Virus; Kaspersky Anti-Virus for MS ISA Server is an anti-virus system for checking files incoming into a local network via Microsoft Internet Security and Acceleration Server. The program operates as a filter intercepting all data exchanged via HTTP and FTP, detecting suspicious objects within the general data stream and analyzing them for viruses. The program uses a flexible system of anti-virus protection settings.

Features: Scans HTTP and FTP traffic for viruses; Manages MS ISA Server load; Updates anti-virus signature every three hours automatically; Uses Microsoft Management Console for management purposes; Create groups of users in accordance with the adopted network policy
avast! ISA Server Edition: Date - Jun 26, 2008; Section - Anti Virus; Antivirus solution for your MS ISA Servers (also works with MS Proxy Server 2.0). Provides real-time scanning of HTTP and FTP traffic at the gateway. avast! ISA Server Edition provides protection for Microsoft ISA 2000 Servers (and also works with MS Proxy Server 2.x). Its main features include scanning, scalability and reporting capabilities. It integrates with ISA Servers via Microsoft's own "ISAPI" interface.

The product works as a plug-in for avast! Server Edition. Therefore, it uses the same engine as the Server Editon itself.
Captivate for ISA Server: Date - Jun 17, 2008; Section - Authentication; Captivate for ISA Server from Collective Software is a filter for ISA 2006 and 2004 that adds captive portal functionality to your proxied networks.

Features include: Display a “Terms of Service” screen or policy page which the user must read and acknowledge; On a wireless network segment, always direct the user to a custom start page first, before allowing other browsing. This could be a home page, or an external web app that collects information or payment; On a wireless network segment, track and log new users by IP and MAC address; Require users to authenticate to ISA with a web form before allowing browsing. This is useful when you cannot control the browser proxy settings, but your users will still have accounts that are known to ISA; Block access to other protocols (such as FTP, SSH, etc.) until a user passes the authorization process, then allow those protocols.
Panda Security for ISA Servers: Date - Mar 28, 2008; Section - Anti Virus; Panda Security for ISA Servers protects against all malware (viruses, worms, Trojans, spyware and adware, spam and hoaxes, phishing, dialers, hacking tools, security risks, etc.). It scans all file formats sent and received. It does this using a Web filter (ISAPI) and an application filter through HTTP, SMTP and FTP (over HTTP).