Solved

Problem accessing certain URL's, others okay

Posted on 2006-06-12
4
254 Views
Last Modified: 2010-03-18
Hi all, a bit of an oddity here. We have a customer using Windows 2003 Server SBS, Windows XP workstaions   ( All SP2) and they are having problems accessing some web sites. This all came about, coincidentally, after upgrading to the latest Symantec Antivirus/Antispam. So now there are certain sites which cannot be accessed, the browser just times out. One example is www.lme.co.uk we cannot open that site at all, but we could. Another is www.experts-exchange.com !!! there are probably lots more that we cannot access, but at the same time there are lots of site that are no problem. We have the standard configuration of two network adaptors, one for LAN and one connected to the Firewall. The configuration of the firewall and router have not changed, neither has the configuration of the IIS. Any clues anyone, oh yes if we try to 'tracert' to www.lme.co.uk we get a trace, but if we try to 'tracert' to lme.co.uk get the messsage "unable to resolve the target system name lme.co.uk" ??
Thanks in advance
0
Comment
Question by:Jonathan_Heller
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 27

Expert Comment

by:pseudocyber
ID: 16884575
I've seen problems browsing - where random sites won't work and some will, and pings working fine - related to MTU.  If you lower the MTU on the Internet connection - firewall, router, whatever, then it works.  However, this wouldn't explain why it was working and now it isn't.

What if you roll back the symantec antivirus/antispam upgrade?
0
 

Author Comment

by:Jonathan_Heller
ID: 16992938
Please could someone tell me how to cancel this question as it turned out that the hardware firewall had become unstable and required replacing.
0
 

Accepted Solution

by:
CetusMOD earned 0 total points
ID: 17231792
PAQed with points refunded (125)

CetusMOD
Community Support Moderator
0

Featured Post

Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

Question has a verified solution.

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

This is the first one of a series of articles I’ll be writing to address technical issues that are always referred to as network problems. The network boundaries have changed, therefore having an understanding of how each piece in the network  puzzl…
Trying to figure out group policy inheritance and which settings apply where can be a chore.  Here's a very simple summary I've written which might help.  Keep in mind, this is just a high-level conceptual overview where I try to avoid getting bogge…
Michael from AdRem Software explains how to view the most utilized and worst performing nodes in your network, by accessing the Top Charts view in NetCrunch network monitor (https://www.adremsoft.com/). Top Charts is a view in which you can set seve…
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

696 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