Cannot load certain websites

Microsoft Windows server 2003 r2 standar...
July 6, 2010 at 12:44:11
Specs: Windows Vista
Hi,

I am currently on a LAN network and since recently I am having problems accessing sites like microsoft.com etc. When I type the address, it loads endlessly without finding the site but it is resolving the IP correctly. I have a VPN setup on the LAN and have a Netgear broadband router. Any help? Thanks


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#1
July 6, 2010 at 16:17:28
"VPN setup on the LAN"

Perhaps its just symantecs but a vpn is on the wan as in internet and not used on a lan.

Usually if going outbound to a vpn you only have that traffic and no other [no other internet access] as this is what a secure vpn is all about.

If you disable the vpn does everything go back to normal?


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#2
July 7, 2010 at 14:04:46
Oops sorry for the wrong wording, VPN on WAN. Shows how stressed i was :). Thanks for the suggestion about not connecting the server to the internet but how will I go about downloading updates etc? I dont normally use the server for internet purposes etc, but many times I use remote desktop to troubleshoot problems.

I dont really want to mess up with that VPN as it took such a hassle to set that up as my friend Paulsep would agree :). However I will try switch it off. How do I test this? Do I simply close the ports for VPN? Thanks.


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#3
July 7, 2010 at 14:08:19
provide the link to the Paulsep discussion so I can see what kind of vpn you have.

Also provide a post of an ipconfig /all from the server for review.


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#4
July 7, 2010 at 14:22:32
Thanks for the reply wanderer. Here's the details:

ipconfig /all:
Microsoft Windows [Version 5.2.3790]
(C) Copyright 1985-2003 Microsoft Corp.

C:\Documents and Settings\Administrator.SERVER.000>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : server
Primary Dns Suffix . . . . . . . : mancosa.dyndns.org
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes
DNS Suffix Search List. . . . . . : mancosa.dyndns.org
dyndns.org

PPP adapter RAS Server (Dial In) Interface:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
Physical Address. . . . . . . . . : 00-53-45-00-00-00
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.1.100
Subnet Mask . . . . . . . . . . . : 255.255.255.255
Default Gateway . . . . . . . . . :

Ethernet adapter Internet:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP NC105i PCIe Gigabit Server Adapter
Physical Address. . . . . . . . . : 00-22-64-FD-5A-E1
DHCP Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.5
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 202.123.2.6
202.123.2.11

C:\Documents and Settings\Administrator.SERVER.000>

VPN setup issue post:
http://www.computing.net/answers/ne...


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#5
July 13, 2010 at 05:02:29
Hi wanderer any advice on how I could proceed with solving this problem? Thanks

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#6
July 16, 2010 at 09:17:57
What does a tracert to microsoft.com show?
Did it go through the VPN tunnel or did it go to the internet directly?

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#7
July 17, 2010 at 16:41:58
Thanks for the reply paul. Glad to see you back on the posts :) Well I used a free software Visual Route 2010 and well it gives me a long list, at least 23 hops, of DNS servers up to microsoft but the result said 100% packet loss!

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#8
July 17, 2010 at 19:16:28
Kpeeroo,

the first hops are interesting to figure out the way, you use to the internet, as mentioned above, through the VPN tunnel or directly.
Therefore, you need to know the first hop of the VPN tunnel and the first hop directly to the internet.

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#9
July 18, 2010 at 07:55:03
thanks paul,
The first few hops:

- 192.168.0.5 (server)
- 192.168.0.1 (router)
- 41.136.240.1 (ISP)
- 196.192.102.142 (ISP)



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#10
July 18, 2010 at 07:58:44
Forgot to mention that microsoft 2003 updates are downloadable though + if i use https://microsoft.com instead of http, i get through to microsoft.com. That said, I cannot reach some other particular sites as well. Very strange indeed.

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#11
July 18, 2010 at 11:47:11
Are this hops, while connected to VPN ?
We have to figure out the differences.

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#12
July 18, 2010 at 12:28:16
No these hops are when connecting directly to microsoft.com on the internet not through VPN.

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#13
July 18, 2010 at 12:29:42
Oh and yes the VPN is connected and on when i get these hops...

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#14
July 18, 2010 at 12:52:06
Ok this all happens at the server, right?
Did this problem also occure, when you try to go to e.g. http://microsoft.com, by doing this on a workstation?

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#15
July 18, 2010 at 13:06:51
yeps you got it right, on the server i tried this and typing microsoft.com doesn't work either on the browser on server nor any workstation.

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#16
July 18, 2010 at 15:21:44
Additional questions:
What default gateway is configured at the workstations?

Is there configured and running any proxy server in yuor environment?

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#17
July 18, 2010 at 15:48:08
Thanks for the reply paul. Gateway is only the router as shown in the above hop:
192.168.0.1
Apart from that we do not have any proxy server.


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#18
July 18, 2010 at 16:06:16
As far as I can see, there is no reason for this issue.
You may try to configure the browser to use a free public proxy for testing on a workstation, and try accessing http://microsoft.com again.
It's maybe a bit slow, but it's just for testing.

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#19
July 29, 2010 at 10:34:05
Hi Paul,

sorry for late reply but i just tried a free proxy, http://www.bypasstheweb.com/, and entered microsoft.com on the server itself. It does work when using this proxy. So where is the problem then? is it something to do with my ISP or something? thanks.


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#20
July 29, 2010 at 14:13:32
Yep, you have to contact your ISP and ask for the reason.

The original poster should always write the last response !!!
Let us know, if the problem is solved !!!


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#21
September 22, 2010 at 07:13:49
You probably have a high MTU setting on your router/modem. It could be set at 1500. Try changing he MTU to 1492 or 1452.

Antony


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#22
September 22, 2010 at 10:14:15
antonysg Thanks for you reply.

I did not phone the ISP, was planning to do so but haven't done so yet. Thanks man, it works! I did change it before you mentioned it to 1400 but it didn't work. It was in fact 1500 and changing MTU to 1492 worked, any reason why is that? It's a Netgear DGN 2000 router. Thanks so much once again.


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