Solved

Some sites on some machines not loading

Posted on 2006-07-14
10
175 Views
Last Modified: 2010-03-18
First, this is not a problem with the client machines so please don't go there.  The environment is a MS Server 2003 Network behind a FortiNet router/firewall appliance.  Client machines are mostly laptops.  When the some (not all) laptops are connected to the company network some websites will not load in *any* browser (IE, Mozilla, or Firefox).  MS related sites will not load (Hotmail, MSN, Windows updates).  There is no error it will try to load the page for several minutes then just stops trying.  The affected machines have nothing in common, they are different models and different ages.  However, not all machines are affected.  I've taken the IP from a machine that works and put in on a machine that does not, but that did not resolve.  I've wiped and reloaded a machine, but that did not resolve.  It has affected machines taken out of the box from the manufacturer.  And they can still access some pages, for instance, Google pages always load perfectly.

Now, when these laptop (all owned by the company) are taken home by the employees and connected to the employees home networks they can access all pages perfectely.
 
0
Comment
Question by:ritchdavis
  • 4
  • 2
  • 2
  • +1
10 Comments
 
LVL 48

Expert Comment

by:Jay_Jay70
ID: 17107130
temporarily wipe your security off the firewall and see if pages start to work
0
 
LVL 4

Expert Comment

by:jcdesign4u
ID: 17107267
Maybe there's a group policy active which causes this problem.
Could be a proxy setting, or restricted sites.
0
 

Author Comment

by:ritchdavis
ID: 17107364
Thanks for the comments.

Firewall and webfiltering have been turned off, the systems restarted, but the same systems still have trouble.

No proxy server is being used and the troubled machines are not set for proxy.  Group policies all seem correct.  The sites are are not restricted on the troubled machines.
0
What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 

Author Comment

by:ritchdavis
ID: 17121104
It looks like we are going to try replacing the router.
0
 
LVL 4

Expert Comment

by:jcdesign4u
ID: 17121116
Maybe resetting the router also helps?
0
 

Author Comment

by:ritchdavis
ID: 17222420
Here's the solution to this problem... We didn't have to replace the router after all.  The reason some machines on the internal network could not access some websites is because the MTU on the router was set too high for the ADSL connection to the internet.

I hope this will be useful to someone else.
0
 

Author Comment

by:ritchdavis
ID: 17222423
We dropped the MTU to 1452 and it now works perfectly.
0
 
LVL 48

Expert Comment

by:Jay_Jay70
ID: 17222427
well done and thanks for posting
0
 

Accepted Solution

by:
ee_ai_construct earned 0 total points
ID: 17569623
PAQ / Refund
ee ai construct, community support moderator
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

FIPS stands for the Federal Information Processing Standardisation and FIPS 140-2 is a collection of standards that are generically associated with hardware and software cryptography. In most cases, people can refer to this as the method of encrypti…
We recently endured a series of broadcast storms that caused our ISP to shut us down for brief periods of time. After going through a multitude of tests, we determined that the issue was related to Intel NIC drivers on some new HP desktop computers …
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …

785 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question