Cannot open certain web pages in browsers

I have a desktop PC and Laptop side by side at work on the same network. Both are running Windows 7 and both have IE8 plus other browsers (Firefox, Opera & Safari). When browsing the internet I can get to certain pages but not others (for example - I can go to http://www.paypal.co.uk but not the Paypal help page - https://www.paypal.com/uk/cgi-bin/helpweb?cmd=_help).
This problem occurs with both computers.
However, when I disconnect the laptop from the network and use a totally separate wi-fi broadband router I can access any page I like with ease.
Both machines are less than 2 months old so everything is pretty much up to date.

Hope somebody can help........
Wat_61Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

sumeshbnrCommented:
what about the present internet connection source ? some firewalls using HTTPS filtering   sicne these sites are HTTPS check this  first
Wat_61Author Commented:
I don't think it can be that as other peoples computers in the office on the same network do not have this problem.
Ravi AgrawalCommented:
Wild guess, but something wrong with device you are using to connect to your first ISP!

What is the medium of connection to the first ISP where you can't browse Secure Sites. Is it connected by a modem / router / cable connection .....?

Ravi.


CompTIA Network+

Prepare for the CompTIA Network+ exam by learning how to troubleshoot, configure, and manage both wired and wireless networks.

Wat_61Author Commented:
The connection is via network cable to HP ProCurve Network Hub > Draytek Vigor 2600 ADSL Router > Cisco Pix 501 Firewall - then to the main server which is running Symantec
Ravi AgrawalCommented:
Ok  your separate wifi router, does it form part of the Draytek Vigor 2600 ADSL Router > Cisco Pix 501 Firewall network or is it independant?

If independant, then I would check the firewall logs.

Ravi.
Wat_61Author Commented:
It is totally independant on a separate phone line. So I will get the firewall logs checked.
Wat_61Author Commented:
Spoken with the company that supports our server. Instead of checking the logs they say that the problem is probably due to both PC's running 64 bit versions of Win7. They then guided me through the process of removing Add-ons, which hasn't worked.

How would I go about checking the firewall logs as suggested?
Ravi AgrawalCommented:
Sorry, you have to been in control of the Firewall to view its logs.

It would be something to fight over & make your Company support understand that the problem is with their end --- as

  1. you can browse secure sites with a different ISP
  2. you cannot browse secure sites using them as an ISP
  3. Had the problem been at your end, you would not have been able to reach secure sites via the 2nd ISP.
That's all I can say.

Ravi.
Wat_61Author Commented:
Thanks for your help Ravi.

I can access the server if I want to. Is this worth doing?
Also, before I have a go at them, is there the possibility that the Firewall logs are not the problem?
Ravi AgrawalCommented:
As per my understanding, yes.

But checking the firewall logs also requires some deep understanding on your part. Just put the 3 points I said to you and they should figure it out on their own, without you having to explain anything,

As even if you go for them, it won't be any use as it is really hard to decipher the logs. You need to have a good knowledge of how your network has been setup, to do the network saavy stuff which probably someone at your physical place will be able to do better.

Ravi.
Wat_61Author Commented:
I understand what you are saying Ravi. I think checking the firewall logs is best left to somebody who knows what they are doing.

If it is ok with you I will leave this question open until I can get them checked and if that's the fix I will close this question and award you the points.

Hope that's ok.
Mark
Ravi AgrawalCommented:
Sure no problem,

I also don't mind you closing the question without awarding the Points, just in case you were not able to fix it.

Ravi.

senadCommented:
Are you connected to a domain ?
senadCommented:
The difference between those 2 links you provided is that one uses encryption (certificate9 and other not.
You are unable to browse the site with the certificate.
So,either your domain (if you are on a domain) administrator blocked access to these sites through policy or
your cryptographic services (service) is malfunctioning (perhaps getting turned off).check that...
Ravi AgrawalCommented:
Senad,

>> your cryptographic services (service) is malfunctioning
 I tend to somewhat disagree as he can browse using a second ISP (no hard feelings, please)

>>either your domain (if you are on a domain) administrator blocked access to these sites through policy

I agree if he says he is on a domain (I presume he is as per the previous postings).

Ravi.
Wat_61Author Commented:
Sorry - what do you mean 'if I am on a domain'?
Ravi AgrawalCommented:
>> I don't think it can be that as other peoples computers in the office on the same network do not have this problem.

I don't think it is a Group Policy as per comment http:#a26600251

Ravi.


Wat_61Author Commented:
The matter still remains unresolved, so just keeping this item up to date with what has been tried so far:

It has now been established that both PC's (laptop & desktop) will not connect to certain pages (i.e. Paypal login) when connected via the office network. However they both connect fine when connected to the stand-alone wireless router.

I have also tried connecting the laptop to the office network using another persons cable (who I know can log in to Paypal) to check if it might be an IP address/Firewall problem but it still failed to connect.

I have also forced a new IP address on my desktop from ipconfig.

The general concensus of opinion is that the problem lies somewhere between my two PC's and the Server - most likely the firewall as suggested above.

Thanks for all your comments - will keep you posted.
Ravi AgrawalCommented:
Could you try & login with a 3rd PC (which can browse but you cannot) to the sites which you cannot browse from your PCs. That would make it all sure, that it is the firewall or something in between the company's network & your PCs.

Ravi.
Wat_61Author Commented:
As I mentioned above, I have logged in with a 3rd PC, so I know other users on the network can access page that I can't. Also, as I put above, I have also connected my laptop to the 3rd PC's network cable - again no success.

So the problem is probably either firewall settings on the Cisco Pix Firewall or local firewall settings (but I have tried turning off the firewall on the laptop but still cannot connect).
Ravi AgrawalCommented:
ok here it gets confusing--

Couple of scenarios seem to emerge again --

You are most probably using a userid & password that identifies you to the company's network.

Using this account, if you can login to the Company's network (and do whatever work you want) using any PC on the network.

Case one - Your particular account has been restricted by a Group Policy
----In this case no matter which PC you login (using your userid / pwd), you are not able to access secure sites

Case two - A firewall blocking access to your PC in particular
----You particular PC is having problems as stated above & you can login using your userid / pwd using some other PC on the Company's network.

To rule out the issue, I asked you to login with a 3rd PC so that we can confirm what is the situation at your place. If you cannot it is a Group Policy Issue, if you can then it is the Firewall.

Either way, it is either the IP of your PC or your User Account that is facing problems.

Ravi.

Wat_61Author Commented:
Sorry - misunderstood!
I can log in to Paypal using my user ID on the 3rd PC.....
Ravi AgrawalCommented:
Lol, it just amazes me, some people like sumeshbnr hit the nail in the head at the very start. See, he stated it earlier in his Comment http:#a26600233 He deserves a fair share of the points in case you manage to solve your issue.

Ravi.
Wat_61Author Commented:
I would agree, but  I can access our company online banking facility (www.natwest.co.uk) via the normal office network and log on without a problem - so wouldn't this rule out HTTPS filtering?
Ravi AgrawalCommented:
Sure, u r right here. but i meant just the firewall & not https filtering :-)

Ravi.
Wat_61Author Commented:
Turned out to be Microsoft Firewall Client for ISA server. Also needed to 'Use Proxy Server'. Solution was found here:

http://social.technet.microsoft.com/Forums/en/w7itpronetworking/thread/54e82679-9f68-4049-8841-f23ae359f1e0

Thanks grtraders for continuing to follow progress and offer helpful advice.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Ravi AgrawalCommented:
Ok, may I have the points please ***********joking***********

Happy to help as always, good luck.

Ravi.
Wat_61Author Commented:
Thanks grtraders - if you'd like to copy and post the solution I found I will list it as the solution.
Ravi AgrawalCommented:
Don't understand again what you mean here.

Accept your Own comment as the Solution and whatever comments you find that helped you to get to your result. You can assign yourself 0 points and others whatever you desire.

If not sure, Click the Request Attention button in the Question Body. This will generate a call for the moderators. They will help you to distribute the points or will do it for you in the way you wish to. Doing this will open up a separate question with 0 points in the community support zone but don't worry, this is the normal procedure here.

:-)

Ravi.
Ravi AgrawalCommented:
Thanks alias,

That clears a little fog of mind too..

:-)

Ravi.
Ravi AgrawalCommented:
Hey Wat_61,

I don't mind to hurt you by objecting but I think I was of some help. If you close your Question this way, it will be deleted off the EE database without any help to anybody visiting EE in future.

I deserve some points at least, if not a Grade A, at least a Grade B.

Please reconsider your Point Allocation for my comment ID: http:#a26610561 as it states it was a firewall issue, which ultimately lead you to your solution.

Moreover as per Experts Exchange Guidelines --
http://www.experts-exchange.com/help.jsp#hs=29&hi=403

What's the right grade to give?

Grading at Experts Exchange is not like school. It's more like the "10-point Must" system in professional boxing; in other words, an answer is worth an A, unless it doesn't resolve your issue. If it requires you to do a little more research, or figure out one more piece of code, then it's worth a B. If you think it's not worth a B, the custom is to offer the Experts an opportunity to earn a better grade.

Mods, please consider my objection in light of the closing comments made by the author--
>>Found solution elsewhere, although some responses to my question helped me what to look for.Ravi.
Wat_61Author Commented:
grtraders - I promise I'd love to give you points and have tried, but having followed the administrative instructions there was no point when I was invited to issue points.

(that's why I suggested that you post the solution that I found - then I will select your posting as the answer and give you all the points - that's what I was getting at before)

Does that make sense....?
Ravi AgrawalCommented:
As per http:#a26820462

"Under your own comments (eg: http:#a26819293) you will see two buttons ("Accept as Solution" and "Accept and Award Points").  The "Accept as solution" button will mark your own answer as accepted.  The "Accept and award points" button will mark your answer as accepted and allow you to assign some or all of the points to Expert comments as "assisted" answers.  This second option should be used if specific Expert comments pointed you in the right direction, to mark those comments as 'assisted' answers."

It was probably not read clearly or you missed it. Just try giving it a shot again.

Ravi.
Ravi AgrawalCommented:
You need to select "accept and award points" button and not the other one,

Ravi.
Wat_61Author Commented:
all clear now - it didn't seem the right choice as I didn't want to award point s to myself!
Ravi AgrawalCommented:
Yes, EE is a bit flaky out there. not your fault.

Thank you for the points.

Ravi.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Web Browsers

From novice to tech pro — start learning today.