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Sbs 2011 not displaying webpages

Posted on 2014-03-06
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Last Modified: 2014-03-17
I have an SBS server that for some reason is not displaying webpages, emails are coming in fine, have restarted the server and router. I can ping google from cmd prompt?? not sure what else to try,  

I am fairly new to servers so please be gentle with me!!??
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Question by:pcspcs2011
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20 Comments
 
LVL 19

Expert Comment

by:helpfinder
ID: 39909041
do you really need to browse web pages from server directly?
what about clients in your LAN enviroment, do they have also this problem?
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LVL 23

Expert Comment

by:Patrick Bogers
ID: 39909043
Hi

What kind of webpages? like OWA?
If you have tried ->    https://mail.yourdomain.com/owa  what does it say?

Else, if you open inetmgr  on that server and browse to default website-> OWA rightclick and explore. Does this raise an error or what is happening?
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LVL 15

Expert Comment

by:cwstad2
ID: 39909056
Ideally you don't want to access the web from the server. This will reduce the exposure to malicious sites.
0
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Author Comment

by:pcspcs2011
ID: 39909086
client PCs are not displaying webpages either, that is why I tried the server. I can browse to remote.mydomain.co.uk/owa and it works fine
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LVL 14

Expert Comment

by:Andy M
ID: 39909101
When you say you can ping google from the server - is this using the ip (8.8.8.8) or via the hostname (www.google.co.uk/www.google.com)?
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Author Comment

by:pcspcs2011
ID: 39909105
via host name
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Author Comment

by:pcspcs2011
ID: 39909106
have just tried to ping 8.8.8.8 and that works fine
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LVL 14

Expert Comment

by:Andy M
ID: 39909108
If you set one of the workstations to use a static IP and specific an external DNS server (i.e. Google - 8.8.8.8, 8.8.4.4 or OpenDNS - 208.67.222.222, 208.67.220.220) is that able to to access websites? (Just trying to narrow down where the exact issue lies).
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Author Comment

by:pcspcs2011
ID: 39909111
will try this, things have been working fine until a few days ago?!?
0
 
LVL 19

Expert Comment

by:helpfinder
ID: 39909235
Check command tracert www.google.com if it will pass.
Is it problem to browse web pagee on port 80 (www.google.com) as well as on 443 (https://www.google.com)?
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Author Comment

by:pcspcs2011
ID: 39909289
tracert seems to pass, not sure what you mean port 80 or 443?? just cannot browse internet on an pc connected to the domain? or the server
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LVL 19

Expert Comment

by:helpfinder
ID: 39909503
can you browse this:
https://www.google.com
http://www.microsoft.com

if tracert also ping is working, if you ping a page and get back also its IP then DNS is working, so then it seems port 80 for browsing net is blocked. It could be a malware/virus infection or just configuration on your firewall/router?
can you test - take PC which is not able to browse web page to another LAN - friends LAN, your home LAN etc and test the same web page? if you are able than your network is problem and needs to be investigated, if you are not than it´s related to PC(s)
0
 

Author Comment

by:pcspcs2011
ID: 39909609
the PCs are at clients site at the moment, I have noticed that when the vpn is connected, our own internet stops?? this always worked before, could this be related?? could it be an issue with my clients isp??
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LVL 19

Expert Comment

by:helpfinder
ID: 39909635
do you have different IP range than client has? (VPN problem question)

yes, it could be ISP issue, but I would prefer to ask ISP if they are not experiencing such a problem and in meantime investigate also client´s LAN so not to waste time if ISP answers they are fine
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Author Comment

by:pcspcs2011
ID: 39909648
Yes we are on different ip range to client, this has been working fine for months until a few days ago, will check client PCs when I can
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LVL 14

Expert Comment

by:Andy M
ID: 39912392
Can you try doing a telnet on port 25 to another (external) mail server to see if it connects or RDP onto a different (external) system.

I've seen this kind of behaviour before (port 80 and 443 traffic prevented) and it ended up being a payment issue with the ISP. Many ISP's will block traffic on port 80 and 443 if they think the account is not up-to-date but things like Pings, tracerts, dns, etc seems to work fine.

As for your VPN - depending on how it's setup it may be passing ALL traffic (including internet) to the problematic site when it's connected which will explain why you lose internet connection when the VPN connects.
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LVL 11

Expert Comment

by:NetoMeter Screencasts
ID: 39914275
If this happens only in Internet Explorer and you can open web pages normally in other browsers, then you have the Internet Explorer Enhanced Security Configuration enabled. You can change this in server manager.
0
 

Accepted Solution

by:
pcspcs2011 earned 0 total points
ID: 39924891
It turns out to be a BT issue, a vary strange one as emails continued to work, and I could access server remotely, so it seemed that the internet was fine!?!
BT had put a red bill reminder on the clients account which should not have been there, they could not give me a reason why the emails and vpn were still working!?!? but once this was lifted (after hours of my time looking at possible issues with the server!!) everything was instantly back working!!
0
 

Author Closing Comment

by:pcspcs2011
ID: 39933753
Was ISP Issue, not related to server or setup
0
 
LVL 14

Expert Comment

by:Andy M
ID: 39934093
Please note ISP issues and suggestions were made by myself and Helpfinder, please assign solution appropriately please.

Helpfinder:

"yes, it could be ISP issue, but I would prefer to ask ISP if they are not experiencing such a problem and in meantime investigate also client´s LAN so not to waste time if ISP answers they are fine"

Myself:

"I've seen this kind of behaviour before (port 80 and 443 traffic prevented) and it ended up being a payment issue with the ISP. Many ISP's will block traffic on port 80 and 443 if they think the account is not up-to-date but things like Pings, tracerts, dns, etc seems to work fine. "

This would also explain why email/vpn/rdp worked and just web browsing was not - BT don't block all traffic, only HTTP/HTTPS when there's a payment/billing flag on the account.
0

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