Can see domain but not internet

Microsoft Windows xp professional w/serv...
February 10, 2010 at 13:39:24
Specs: Windows XP Pro
I have several computers at work here that I have rebuilt. 2 of them are capable of seeing the internet and 3 cannot. All 5 of them are capable of navigating our intranet however. Remote Desktop works to and from. But I cannot get them outside the firewall.

We recently switched to SBS2008 but I don't have enough info to tell you if that is when this issue started.

As always, any help is welcome!

Thanks.


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#1
February 10, 2010 at 14:04:59
Open a command prompt window on one that works, and one that doesn't work. Issue the following command on both:

ipconfig /all

Compare the output on both. The only thing that should be different is the actual IP address. The DNS and Default Gateway IP's should be identical.


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#2
February 10, 2010 at 14:29:42
One piece of info I neglected to mention is that if I VPN to SBS2008 then I can get to the internet. Close the VPN connection and no more browsing.

Curt R I checked the configuration and it checked out alright where the DNS, Gateway and DHCP server are concerned. I do show a PPP adaptor address since the VPN was set up and that IP differs from the Ethernet IP.


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#3
February 10, 2010 at 14:32:31
There is no reason be be vpning on the internal network. The server appears to be misconfigured.
A vpn is to supply secure tunneled access to your server via the Internet not the intranet

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Related Solutions

#4
February 10, 2010 at 14:41:16
Thanks, I always wondered what VPN's were for. I mentioned that only to demonstrate that the PC can browse the internet.

What setting in the server would keep machines from accessing the internet?


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#5
February 10, 2010 at 15:00:28
we need to review the output of an ipconfig /all from both the server and a workstation

who setup this server?


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#6
February 10, 2010 at 15:15:57
thanks for taking a look at this. Our server was set up by our IT vendor. Below are the IPCONFIG /ALL. PC first Server second.

[PC CONFIG]

Windows IP Configuration

Host Name . . . . . . . . . . . . : 5dvj0b1
Primary Dns Suffix . . . . . . . : lcpdc.local
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : lcpdc.local
lcpdc.local

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : lcpdc.local
Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Cont
roller
Physical Address. . . . . . . . . : 00-13-72-87-E3-B5
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 10.0.0.79
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.0.0.1
DHCP Server . . . . . . . . . . . : 10.0.0.5
DNS Servers . . . . . . . . . . . : 10.0.0.5
Lease Obtained. . . . . . . . . . : Wednesday, February 10, 2010 3:49:44
PM
Lease Expires . . . . . . . . . . : Thursday, February 18, 2010 3:49:44
PM


[SERVER CONFIG]

SBS2008 SERVER


Windows IP Configuration

Host Name . . . . . . . . . . . . : SBS2008
Primary Dns Suffix . . . . . . . : lcpdc.local
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : lcpdc.local

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom BCM5708C NetXtreme II GigE (NDIS
VBD Client)
Physical Address. . . . . . . . . : 00-26-B9-39-73-B1
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5676:7185:7355:97a0%10(Preferred)
Link-local IPv6 Address . . . . . : fe80::a18c:6077:8dc6:fa26%10(Preferred)
IPv4 Address. . . . . . . . . . . : 10.0.0.5(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
IPv4 Address. . . . . . . . . . . : 10.0.0.6(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 10.0.0.1
DNS Servers . . . . . . . . . . . : fe80::5676:7185:7355:97a0%10
10.0.0.5
10.0.0.3
NetBIOS over Tcpip. . . . . . . . : Enabled

PPP adapter RAS (Dial In) Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : RAS (Dial In) Interface
Physical Address. . . . . . . . . :
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv4 Address. . . . . . . . . . . : 10.0.0.47(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . :
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 8:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : isatap.{43EF8F1A-F4AF-418D-BF2D-1C840D258
E53}
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 9:

Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter #2
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes


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#7
February 10, 2010 at 15:47:15
Host Name . . . . . . . . . . . . : SBS2008
IP Routing Enabled. . . . . . . . : Yes
IPv4 Address. . . . . . . . . . . : 10.0.0.5
then you have
PPP adapter RAS (Dial In) Interface
IPv4 Address. . . . . . . . . . . : 10.0.0.47

Iprouting means you are routing between these two interfaces. To route you have to have two DIFFERENT ip subnets whereas you have the same one 10.0.0.x

That does not look right to me.

The fact you can VPN on the 10.0.0.5 interface tells me the vpn was set up on the wrong interface. It should only be on the PPP interface.

This could be what is preventing internet access in that the server is taking the request and trying to route it out the ppp interface instead of the gateway 10.0.0.1

It appears you have two DNS servers. One at .5 and one at .3 Workstation is pointing at .5 which is fine.

Only question I have is in DNS was the forwarder tab populated with the ISP's dns server ips? If blank this is also misconfigured which results in no name resolution [you can't do google.com but you can do googles ipaddress].

This should walk you thru in how to check this
http://technet.microsoft.com/en-us/...

Have you tested vpn-ing/rdping in from the outside? After all there must be a good reason this was setup this way.


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#8
February 11, 2010 at 13:19:03
Thanks for all your help folks!

The issue has been resolved. After a few hours with our outsource IT group it turns our Sonicwall firewall that was caching MAC addresses and associating them with IP addresses. When we came in this AM several machines couldn't connect that were fine yesterday. The overnight change was their IP address.

What a pain this has been but has been solved!


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