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Changing IP address Range on W2k Network

By NickW_uk ·
We have an W2K SBS server setup with a default 192.168.xx.xx address range. It currently uses an IDSN router through a 2nd NIC.
We now have ADSL installed and the ISP has assigned a range of IP addresses, which they said was needed for Exchange to communicate. Can I just modify the IP address of the 2nd NIC or do I alter all the IP addresses.
If altering is the answer I can do DHCP OK but what about DNS and what other places on SBS?
TIA

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Changing IP address Range on W2k Network

by isys In reply to Changing IP address Range ...

Your DSL router has a WAN IP that is assigned by your ISP. Hopefully you have a firewall of some type (if not, get one right away!!). If you don't have a DMZ port on your firewall you would use one-to-one NAT to attach your internal machines to the Internet and register the external address with your ISP for DNS purposes. For example, your Exchange internal address might be 192.168.140.25. Set the firewall device to translate that address to 216.145.123.110 or one of the public IP addressesassigned by your ISP and have them register that address for DNS. If you do not choose to do the firewall thing, then just change the second NIC to the public address and have it registered. You only need to have public addresses for machines thatwill be sending and receiving traffic across the Internet.

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Changing IP address Range on W2k Network

by NickW_uk In reply to Changing IP address Range ...

Thanks for your help.

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Changing IP address Range on W2k Network

by John Boy In reply to Changing IP address Range ...

Agree with above.

Also be aware that you can change the range for the internal dhcp scope but will lose your clients until their previous dhcp leases expire (default of 8 days). You can manually do an "ipconfig /release" then ipconfig /renew to get them to play ball straight way with dns.

If you have WINS anywhere then you will need get some horrible "duplicate network address" errors until you tombstone the old client workstation addresses as there will be two ip addresses for each 'name'.

Certainly doable though.

Good luck

John-Boy

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Changing IP address Range on W2k Network

by NickW_uk In reply to Changing IP address Range ...

Thanks for this as well.

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Changing IP address Range on W2k Network

by NickW_uk In reply to Changing IP address Range ...

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