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Assign static IP addresses, and then block those addresses on the firewall.
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We have a network running SBS 2003, with Windows 7 clients. WE also have a zywall 20 usg. We have a couple of Windows XP computers as we need them to run some older applications that are not compatible with windows 7. These machines need access &nbsp;to the network but we would like to block access to the internet from them. Is there a way to achieve this, we can't do it on a user basis as a number of different users logon to the machines and they need internet access from other computers.
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We have a network running SBS 2003, with Windows 7 clients. WE also have a zywall 20 usg. We have a couple of Windows XP computers as we need them to run some older applications that are not compatible with windows 7. These machines need access  to the network but we would like to block access to the internet from them. Is there a way to achieve this, we can't do it on a user basis as a number of different users logon to the machines and they need internet access from other computers.

Block computers from accessing the internet

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).

Hardware-based firewalls provide more sophisticated protection for inbound and outbound traffic than the simple Windows software firewall or the basic NAT firewalls found in routers. These devices implement techniques such as stateful packet inspection, deep packet inspection, and content filtering; and may include built-in antivirus and anti-malware protection.

Hardware Firewalls

The Windows operating systems have distinct methodologies for designing and implementing networks, and have specific systems to accomplish various networking processes, such as Exchange for email, Sharepoint for shared files and programs, and IIS for delivery of web pages. Microsoft also produces server technologies for networked database use, security and virtualization.