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JSI Tip 2259. ICS may not work reliably if the DNS or DHCP service is installed on the same computer.

ICS ( Internet Connection Sharing) is a Windows 2000 implementation of NAT ( Network Address Translation). ICS sets up a mini DHCP scope and DNS Proxy service.

When these services start, they bind to the same TCP ports as DNS and DHCP, causing conflicts.

Instead of using ICS on a DNS or DHCP server, use RRAS to configure NAT.

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