Mon, Dec 27 2004 19:30
Probably the number one asked question back to posters in the newsgroup is
“Please post the results from ipconfig /all at both a workstation and a server”
So many issues with a SBS network are “fixed” with the right Internet Protocol configuration on the server. It's amazing how people and go through the wizard and not “get” what they are trying to set up. I think it's because of coming from peer to peer and on network card setups and now reading about different ways to set these networks up. Many people expect that there should be an “Internet connection sharing” tab on the server, but we don't do things like that.
The most recommended diagrams to follow for setting up a network can be found here:
While you can do a one nic setup as discussed here:How to Configure a SBS for Full Time Internet Access with a Single Network Adapter:
http://support.microsoft.com/kb/309633 I personally feel that two nics is more “separated“, more flexible and I just feel more comfortble with the wizards of SBS than the configuration of a hardware firewall.
The other KB that talks about two network cards is listed here: How to Configure Small Business Server for Full Time Internet Access with Two Network Adapters:
Basically you point to the server, the internal IP address for all your DNS entries. You only put in the ISP's DNS information into the DNS configuration as “forwarders“. This is done automagically in the “connect to Internet“ wizard, but you can see the impact in the Admin tools, DNS. Right mouse click on the server name, click on the “forwarders tab“ and you can see where the wizard put in the ISP's forwarders.
See? That's the ISP's DNS that I placed in my box when I ran the connection wizard. You don't put that information in the Network card properties as DNS as you would normally in a peer to peer with a Linksys.
This “separates“ and builds a wall between the inside and the outside to better protect you.
So next time you are having issues with your network, review the settings. Start, command prompt, type in ipconfig /all and hit enter. Copy what you see there, and paste it into the newsgroups and have us check why you are having issues!
Syntax: ipconfig [/all] [/renew [Adapter]] [/release [Adapter]] [/flushdns] [/displaydns] [/registerdns] [/showclassid Adapter] [/setclassid Adapter [ClassID]]
/all : Displays the full TCP/IP configuration for all adapters. Without this parameter, ipconfig displays only the IP address, subnet mask, and default gateway values for each adapter. Adapters can represent physical interfaces, such as installed network adapters, or logical interfaces, such as dial-up connections.
/renew [Adapter] : Renews DHCP configuration for all adapters (if an adapter is not specified) or for a specific adapter if the Adapter parameter is included. This parameter is available only on computers with adapters that are configured to obtain an IP address automatically. To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.
/release [Adapter] : Sends a DHCPRELEASE message to the DHCP server to release the current DHCP configuration and discard the IP address configuration for either all adapters (if an adapter is not specified) or for a specific adapter if the Adapter parameter is included. This parameter disables TCP/IP for adapters configured to obtain an IP address automatically. To specify an adapter name, type the adapter name that appears when you use ipconfig without parameters.
/flushdns : Flushes and resets the contents of the DNS client resolver cache. During DNS troubleshooting, you can use this procedure to discard negative cache entries from the cache, as well as any other entries that have been added dynamically.
/displaydns : Displays the contents of the DNS client resolver cache, which includes both entries preloaded from the local Hosts file and any recently obtained resource records for name queries resolved by the computer. The DNS Client service uses this information to resolve frequently queried names quickly, before querying its configured DNS servers.
/registerdns : Initiates manual dynamic registration for the DNS names and IP addresses that are configured at a computer. You can use this parameter to troubleshoot a failed DNS name registration or resolve a dynamic update problem between a client and the DNS server without rebooting the client computer. The DNS settings in the advanced properties of the TCP/IP protocol determine which names are registered in DNS.
/showclassid Adapter : Displays the DHCP class ID for a specified adapter. To see the DHCP class ID for all adapters, use the asterisk (*) wildcard character in place of Adapter. This parameter is available only on computers with adapters that are configured to obtain an IP address automatically.
/setclassid Adapter [ClassID] : Configures the DHCP class ID for a specified adapter. To set the DHCP class ID for all adapters, use the asterisk (*) wildcard character in place of Adapter. This parameter is available only on computers with adapters that are configured to obtain an IP address automatically. If a DHCP class ID is not specified, the current class ID is removed.
/?: Displays help at the command prompt.
To display the basic TCP/IP configuration for all adapters, type:
To display the full TCP/IP configuration for all adapters, type:
To renew a DHCP-assigned IP address configuration for only the Local Area Connection adapter, type:
ipconfig /renew "Local Area Connection"
To flush the DNS resolver cache when troubleshooting DNS name resolution problems, type:
To display the DHCP class ID for all adapters with names that start with Local, type:
ipconfig /showclassid Local*
To set the DHCP class ID for the Local Area Connection adapter to TEST, type:
ipconfig /setclassid "Local Area Connection" TEST
Filed under: SBS Installation