LinkedIn site coming up as text in our domain

At first we thought the issue was toward one user. but come to find out everyone on the domain cannot see the site the way they are suppose to. its coming up as text.  

The antivirus we use is Trend micro advanced.

any ideas as to what could be blocking the site from fully coming up.
BBraytonAsked:
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BBraytonConnect With a Mentor Author Commented:
No i set it back to manual and it still worked. Here is the link that I found the security settings and it worked!!



http://help.linkedin.com/app/answers/detail/a_id/6021
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Clear all temporary Internet files (cache)

What browser are you using?

Jeff
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BBraytonAuthor Commented:
I ran ccleaner and cleared everything in internet explorer. I tried IE, Chrome and Mozilla and still the same thing. I went to another PC on the network and same thing. I added the url to the antivirus trusted list and nothing.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Is it accessing the site via http or https?

Try adding the site to IE's Trusted Sites.

Jeff
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BBraytonAuthor Commented:
I tried both and Http and https. I added it to trusted sites. and still nothing.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
What about logging into that computer with the local administrator account.  Can you access the site correctly that way?
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BBraytonAuthor Commented:
we added a PC right out of the box and still the same issue. and tried other computers as well.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Ok.  I'll take a bet that this is being caused by the MTU setting on your firewall/router.

It most likely is set to the default of 1500.  Try changing it to 1280 instead.

Jeff
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BBraytonAuthor Commented:
we use a Cisco Rv042 router I can try that. Let you know if It works
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BBraytonAuthor Commented:
The MTU is set to auto I can switch it to manual and set the number to 1280..  just out of curiosity what would setting it to 1280 do? How will that help?
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Yes, you can switch to manual and set to 1280.  MTU controls TCP Packet size.  Some web sites have coding which works better on a smaller packet size.  

It won't hurt anything for you to change the setting, it can always be changed back.

Give it a try.

Jeff
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
FYI, here's someone else's experience:
http://www.secretweaponlabs.com/2009/09/getting-in-to-linkedin-how-to-fix-non-loading-linkedin-com/

They actually lowered MTU to 1000, but that may be too low for overall performance.

The setting can also be changed at the workstation level:
http://www.prash-babu.com/2008/06/how-to-change-mtu-values-in-windows.html

Jeff
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BBraytonAuthor Commented:
ok when I bring up the site its not in text mode anymore but the pictures do not show when its http. when I change it to https the page looks good.

now when I click on mail on the site or profile it switches back to http and the page hides the pictures again. is there a way to make all the linked in sites go to https
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BBraytonAuthor Commented:
ok I found out how to make linkedin only use Https. and it works great now.
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Great!  So the MTU change essentially fixed the problem?
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Jeffrey Kane - TechSoEasyPrincipal ConsultantCommented:
Ahhh, very strange.  If you enable Secure Browsing in your LinkedIn profile, then it should automatically switch over to https -- bad coding/configuration on their part.

Glad you got it worked out though.

Jeff
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BBraytonAuthor Commented:
I found the fix for the issue. We have trend micro advanced on the network and I had to add a few trusted url's.
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BBraytonAuthor Commented:
I found this while researching online.
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