<div>
Yip... That did it. &nbsp;<br />
<br />
The steps I needed were contained in: <a href="http://www.isaserver.org/tutorials/2004dhcprelaydmz.html" rel="ugc">http://www.isaserver.org/tutorials/2004dhcprelaydmz.html</a><br />
<br />
Thanx Again.<br />
The Firewall is working like a charm now.<br />

</div>


Yip... That did it.  

The steps I needed were contained in: http://www.isaserver.org/tutorials/2004dhcprelaydmz.html [http://www.isaserver.org/tutorials/2004dhcprelaydmz.html]

Thanx Again.
The Firewall is working like a charm now.


<div>
Welcome :)<br />
<br />
Regards<br />
keith
</div>


<div>
<div class="content wysiwyg-content">
Hi All,<br />
<br />
Thanx to Keith Alabaster I now have a functional tri-homed ISA server that is happy to allow routing between the two Internal network that the ISA Server is protecting. &nbsp;The only key element now is to allow only the DHCP broadcasts to pass between the two networks as this us currently not allowed.<br />
<br />
Short and sweet, I need to be able provide computer in my LAN segment IP addresses from the DHCP server that is housed in the Server segment:<br />
<br />
LAN Segment &nbsp;&lt;-&gt; &nbsp;ISA Server &nbsp;&lt;-&gt; &nbsp;Server Segment<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; |<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; V<br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;External Network<br />
<br />
Thanx<br />
<br />
For more information on the current configuration of the firewall rules: &nbsp;<a href="https://www.experts-exchange.com/questions/21906673/ISA-TriHomed-Box.html" rel="ugc">https://www.experts-exchange.com/questions/21906673/ISA-TriHomed-Box.html</a> <br />

</div>
</div>


Hi All,

Thanx to Keith Alabaster I now have a functional tri-homed ISA server that is happy to allow routing between the two Internal network that the ISA Server is protecting.  The only key element now is to allow only the DHCP broadcasts to pass between the two networks as this us currently not allowed.

Short and sweet, I need to be able provide computer in my LAN segment IP addresses from the DHCP server that is housed in the Server segment:

LAN Segment  <->  ISA Server  <->  Server Segment
                                    |
		    V
	          External Network

Thanx

For more information on the current configuration of the firewall rules:  http://www.experts-exchange.com/Security/Firewalls/Q_21906673.html 


3-Homed ISA Server – DHCP relay???

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.

Microsoft Forefront ISA Server

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.