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Connection-specific DNS suffix strange!

By CurtisInterruptus ·
On our total Windows 2000 network, all my clients have a weird issue. If you do a "ipconfig", all show the "connection-specific DNS suffix" to have a "51" added to the end of the "" name. instead of "", it shows "domain.com51".

Any ideas what is causing this? I have restarted my DNS service on the AD and doublechecked the network configurations on the client stations.

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by NetTek In reply to Connection-specific DNS s ...

Connection-specific DNS suffixes can only be added manually to clients. They cannot be configured using DHCP. If they are not manually set to "com.51", then I have no answer as to why a "51" has been added to the end of the suffix.

However, I am confused as to why you have connection-specific DNS suffixes configured. The purpose of a connection-specific suffix is to assign a specific dns name to a particular IP address when the host has more than one NIC card installed. For example, if your client is called "host", its domain name would be If you only have one NIC installed, you do not need a connection-specific DNS suffix because the primary domain ( is used by default.

But if you have two NIC cards, say with addresses and, the primary domain name would be You could then assign connection-specific suffixes to each NIC such as for, and for

Since I doubt all your clients have two NICs, you can remove those settings.

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by CurtisInterruptus In reply to

The confusion was caused by my firewall, which hosts DHCP. In the network area it was reporting the main domain as "domain.com51" and it was propagating to all my clients. After correcting that the problem began to clear up. I am also taking your advise and removing the connection specific settings from the clients machines.


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by CurtisInterruptus In reply to Connection-specific DNS s ...

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