Perform the following steps after copying the service pack to the ISA Server:. Log onto the machine after the ISA Server service pack 1 installation routine restarts the machine. You can download the HotFix pack, isahf Download the file to a machine on the internal network, scan it for viruses, and then copy it to the ISA Server. Perform the following steps after copying the file to the ISA Server:. Note that you do not need to restart the server. The next step is to install Feature Pack 1.
Feature Pack 1 FP1 is not required. Download the feature pack to a machine on the internal network and scan it for viruses. Then copy the file to the ISA Server and perform the following steps:. Windows Server provides the highest level of stability and security ever seen in a Windows-based platform and ISA Server raises the level of security by several orders of magnitude.
I hope you enjoyed this article and found something in it that you can apply to your own network. Tom Shinder is a Program Manager at Microsoft and has two decades of networking and security experience. He has written dozens of books, thousands of articles, and spoken at large industry conferences on the topics of IT infrastructure, Cloud computing, and cybersecurity.
Install Windows Server You need at least one internal and one external interface. The external interface is never on the LAT. Only the external interface is configured with a default gateway address. Windows Server , like Windows , allows one interface to have a default gateway. You can have multiple public address DMZ interfaces, but only a single interface can connect the internal network to the Internet.
The preferred configuration is to configure the internal interface of the ISA Server with the address of a DNS server on the internal network that is capable of resolving Internet host names.
You should also put the internal interface on the top of the interface list because Windows Server uses the interface order to determine which name server addresses to query first. Perform the following steps to configure the interface order on the ISA Server computer:. The external DNS server will not be able to resolve internal network host names. Under certain circumstances the Internet DNS server could be placed on the top of the DNS server list and this can lead to the ISA Server not being able to communicate with the internal network domain controllers and interfere with authentication.
All non-essential services should be disabled on the ISA Server computer. We also recommend that you do not use the Web browser or email client software on the ISA Server firewall, as Web browsing and email clients are major vectors for virus and worm attacks.
A properly configured ISA Server firewall is very secure, but the addition of client applications can have a significant negative impact on ISA Server security. Install ISA Server Perform the following steps after copying the service pack to the ISA Server:. Install HotFix isahf Log onto the machine after the ISA Server service pack 1 installation routine restarts the machine. You can download the HotFix pack, isahf Spreading across partitions on the same physical disk offers no performance improvements.
In the Local Address Table dialog box Figure B-3 , verify that the network card connected to the internal network is selected. Do not select the adapter connected to the Internet or perimeter network. If the server is connected directly to the Internet it isn't behind a firewall or router that uses NAT , select the Add The Following Private Ranges check box; otherwise, leave it cleared.
Note The local address table LAT identifies which addresses are on the local network, and it is thus accessible through the network adapter connected to the internal network. Addresses not located in the LAT are accessed using the network adapter connected to the external network the Internet.
A Setup Message appears, warning you that the automatically constructed LAT might include external addresses. Click OK. Click OK again.
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