I have SBS 2008 running a network with about 10 workstations. One workstation lost Internet access overnight. It can connect to the LAN, but not to the Internet. The rest of the workstations still have Internet access. I've confirmed the hardware works. I scanned the registry and ran all the diagnostics I can find. I then attempted to uninstiall and reinstall the connection to the LAN, but the wizard crashed, leaving me with a workstation with only one use, "_sbs_netsvs" or something like that, and I was unable to create any more user accounts using the one user I had. I eventually reinstalled Win 7 (x64) onto the workstation, and successfuly reconnected to the LAN, but I still can't get Internet access. IE8 was unable to diagnose the connection problem. Ideas?

Take a look at the IP configuration for this computer and compare it to another on the same subnet. The IP network should be the same, but each computer should have a unique IP such as computer A - 192.168.1.1 and computer B- 192.168.1.2. the subnet mask, default gateway, and DNS configs shoud be identical on both machines. You can look at their configs by opening a command prompt on each computer and typing IPCONFIG /all. If the settings are the same with the exception of the IP address, you can do some troublshooting by using the PING and NSLOOKUP commands. Start with PING to check for network connectivity. See if this computer can ping another one on the same subnet. Can it ping the gateway, can it ping an IP past the gateway? If its successful, then network connectivity is OK. Then check to make sure that name resolution is working. Here are some helpful guides. Using PING to Test for Network Connectivity http://www.anitkb.com/2010/06/using-ping-to-test-for-network.html Ping and ICMP Error Messages http://www.anitkb.com/2010/06/ping-and-icmp-error-messages.html Using NSLOOKUP to Troubleshoot Common DNS Issues http://www.anitkb.com/2010/03/using-nslookup-to-troubleshoot-common.html Visit: anITKB.com, an IT Knowledge Base.

The only substantive difference between the ipconfig /all results was that IP routing was enabled on the good workstation. But several other workstations on the LAN can access the Internet with IP routing disabled. I notice that the router recognizes the bad workstation's IPv6 local-link address, but does not recognize the IPv4 address for the bad workstation. From the bad workstation, I can PING to the gateway, the server, and another workstation on the LAN. I succeed with PING 127.0.0.1. However, a ping to one outside address (in this case www.bing.com) was 75% lost and a ping to another outside address was 100% lost. Similar results with NSLOOKUP commands, although I get an interesting additional message. For example, when I type nslookup www.espn.com on a working workstation, I get: Server: www.espn.com Address: 199.181.132.250 *** www.espn.com can't find nslookup: No response from server And then when I PING 199.181.132.250 from the same computer, I get essential the same result and message. When I move to the bad workstation, and type nslookup www.espn.com on the bad workstation, I get: Server: server.domain.local Address: 192.168.0.2 Non-authoritative answer: Name: www.espn.com Address: 199.181.132.250 I don't get the message at the end. Then when I PING 199.181.132.250, I get 75% loss. Ideas?

I just tried restarting DHCP with no success. I also deleted all of the IP licenses to cause them to be refreshed. I also traced down all of the possible firewalls and verified that port 80 was open. I also uninstalled Norton from the good workstation to see if I could recreate the problem. No luck. Ideas?

From the "bad" workstation, check the arp cache (command prompt --> arp -a). If the default gateway's MAC is not listed, you'll never get the packets delivered past your local segment. High Level summary on the process of routing: How IP Packets are Routed on a Local Area Network http://www.anitkb.com/2010/06/how-ip-packets-are-routed-on-local-area.htmlVisit: anITKB.com, an IT Knowledge Base.

No luck. The arp table shows the default gateway's MAC. I took the bad workstation home, connected it to the Internent, bypassed WSUS, and downloaded all updates I could find. I also uninstalled and reinstalled Norton 360 v.4, which is on all of the good workstations on the network. I was able to surf the web on the bad workstation from home. I then brought it back to the office and had the same old problem. When I start IE8, I get the company website inside the LAN. But when I do anything to get to the WAN, IE8 comes back with "Website Found, Waiting for Reply" and then times out. The IE8 diagnostics are unable to find a cause. Any more ideas? Someone's going to get a gold star for solving this one.

Based on your latest testing, it would indicate that the workstation is working properly. However, when connected to your network, IE8 encounters problems accessing web sites. Based on your previous post with regard to NSLOOKUP, the bad workstation is resolving correctly for DNS. Server: server.domain.local Address: 192.168.0.2 Non-authoritative answer: Name: www.espn.com Address: 199.181.132.250 The first NSLOOKUP result you posted is incorrect because you attempted to connect to www.espn.com as a DNS service, so of course the result you received "*** www.espn.com can't find nslookup: No response from server" is correct. Is it possible that your corporate network requires that your clients use an internal Proxy Server and this computer (the bad one) does not have the proxy settings configured? Or, if there is no proxy server, could there be a firewall rule (at the perimeter firewall) preventing this computer from accessing the internet? Visit: anITKB.com, an IT Knowledge Base.

No, on the firewall question. I have firewalls running on the workstations, the server, and the router. None have a computer-specific rule, although the router uses a "virtual server" for the firewall exceptions. It's a D-Link router. Disabling the router firewall made no difference. I don't see any setting for a Proxy Server idea. The setup was pretty basic, and I have already tried to solve the problem by disconnectinig and re-connecting the workstation to the network. For what it's worth, I can hover over the network icon on the bad workstation (lower right) and it will say: domain.local Internet access In other words, the adapter seems to think it's getting the Internet, and the workstation can connect to the LAN. I just can't get to the Internet. I researched the message and concluded it simply refers to whether a particular Firewall port is open, but has nothing to do with whether the adapter is actually receiving the Internet. Ideas?

No on the firewall question. I have firewalls running on the workstations, the server, and the router. None have a computer-specific rule. However, the router uses a "vertual server" for the firewall exceptions. It's a D-Link router. Should I disable one or more of the firewalls?

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So lets review, your arp table contains the MAC of the router. You can access everything on your network, just no access to internet web sites. Ok, I would be interested in seeing two things. Your IPCONFIG and Routing Table. If you would like, feel free to post the results of "ROUTE PRINT" from a command prompt as well as the results from "IPCONFIG /ALL" If these results appear to be OK, the last tool in the "bag of tricks" would be to install a packet capture application and see where the packets are actually going. Visit: anITKB.com, an IT Knowledge Base.

Here are the ipconfig /all results while the workstation is connected to the LAN. I've retyped them here because I can't get on the computer, the network, and the Internet at the same time, so the format is different. Host Name (Computer-14) Primary DNS (domain.local) Node Type (Hybrid) IP Routing (Disabled) WINS Proxy (Disabled) DNS Suffix (domain.local) Ethernet Adapter Local Area Connection: Connection Specific DNS (domain.local) Description (NVIDIA nForce 10/100 Ethernet) Physical Address (00-26-18-7B-BF-75) DHCP (Enabled) Autoconfiguration (Enabled) Link-Local 6 (fe80::b4bd:af48:efbc:98e3%11<preferred>) IPv4 Address (192.168.0.21<preferred>) Subnet (255.255.255.0) Default Gateway (192.168.0.1) DHCP Server (192.168.0.2) DHCPv6 IAID (234890776) DHCPv6 Client (00-01-00-01-14-A6-DE-50-00-26-18-7B-3F-75) DNS Servers (192.168.0.2) NetBIOS (Enabled) There are three other adapters, but they are all disconnected. Here is the route print, which I am formatting by separating columns with a ";". Interface List: 11; 00-26-18-76-3f-75; Ethernet 1; .......; Software Loopback Interface 1 12; 00-00-00-00-00-00-00-e0 13; 00-00-00-00-00-00-00-e0 15; 00-00-00-00-00-00-00-e0 IPv4 Route Table (Network Destination; Network; Gateway; Interface; Metric) 0.0.0.0; 0.0.0.0; 192.168.0.1; 192.168.0.21; 20 127.0.0.0; 255.0.0.0; On-Link; 127.0.0.1; 306 127.0.0.1; 255.255.255.255; On-Link; 127.0.0.1; 306 127.255.255.255; 255.255.255.255; On-Link; 127.0.0.1; 306 192.168.0.0; 255.255.255.0; On-Link; 192.168.0.21; 276 192.168.0.21; 255.255.255.255; On-Link; 192.168.0.21; 276 192.168.0.255; 255.255.255.255; On-Link; 192.168.0.21; 276 224.0.0.0; 224.0.0.0; On-Link; 127.0.0.1; 306 224.0.0.0; 224.0.0.0; On-Llink; 192.168.0.21; 276 255.255.255.255; 255.255.255.255; On-Link; 127.0.0.1; 306 255.255.255.255; 255.255.255.255; On-Link; 192.168.0.21; 276 Persistent Routes: None. IPv6 Route Table: Active Routes (If Metric Network Destination; Gateway) 1; 306; ::1/128; On-Link 11; 276; fe80::/64; On-Link 11; 276; fe80::b4bd:af48:ef6c:98e3/128; On-Link 1: 306: ff00::18; On-Link 11; 276; ff00::18; On-Link Persistent Routes: None I went looking for a packet capture application, but those things aint cheap. I'm now fascinated by the mystery. I hope someone can solve this problem.

The IP configuration and Route table look good with regard to the IPv4 configuration. If you are comfortable using a packet capture, you can download Wireshark...its free and very good. Its possible that this workstation is OK, since you did successfully access the internet from your home network. Have you tried a different switch port/patch cable at work? Also, just for the hek of it, have you checked the arp tables on the switch and router? You can also try to download a linux distro on a CD and boot off of that so you do not disturb windows and see if the alternate OS allows you to access the internet using that computer hardware, swtich port and router. Or, If you were to try a different NIC card in the windows computer and still have the same results, I would look towards the switch port or router. With these additional tests, you would have ruled out the NIC and OS. This is a very mysterious problem.Visit: anITKB.com, an IT Knowledge Base.

I walked away from the problem for a week to lower my frustration level. When I returned to it, I tried the hair-brained idea of using a wireless adapter instead of the ethernet adapter. It worked. I can connect to the Internet and the LAN through the wireless adapter, when I remain unable to do the exact same thing through the ethernet adapter. I then downloaded fixcleaner to see if I had a dll problem, but running fixcleaner did not work. Now that I have a way to get around the problem, I'll work on it a little more slowly, starting with the packet capture. Now it's a puzzle and not a business problem. I'll let you know if I solve it. Thanks.

SOMETIMES THE ANSWER IS SIMPLE, HAVE YOU TRIED TO RESET THE INTERNET SETTINGS IN INTERNET OPTIONS ADVANCED TAB. IT WORKED FOR ME ONCEim new to this world show me around