Unable to Surf by IP when using Squid as a transparent Proxy

I have a couple of different offices that use Linux boxes as combined routers and transparent proxies.  All of them are working fine, apart from one which is having a weird issue when attempting to view a web page via IP.  Using this website as an example, if I surf to;

http://www.experts-exchange.com

It works fine.

However, if I surf to;

http://64.156.132.140

It will immediately drop me to a standard 'page cannot be displayed' message.

If I bypass the transparent proxy, say by trying to load the page on the router itself, it works fine, so I don't believe it is an ISP issue.

My other locations using seemingly identically configured proxies can access pages by IP fine.
LVL 2
ropetinAsked:
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.

robocatCommented:


Can you see your attempt in the squid logs (access.log, store.log) ?
0
ropetinAuthor Commented:
No, the page view attempts do not show up in either log file.
0
ravenplCommented:
You see, if squid is configured in transparent mode it have to know where You really want to go. It uses the name You enter into browser as destination.
If You enter ip, and therefore there;s no Host: http/1.1 request header, squid does not know where to go? It have to drop it.
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

ropetinAuthor Commented:
So the question I have is, why do 6 seemingly identically configured squid proxies, seem to not  have a problem?
0
robocatCommented:

How do you redirect the traffic to the transparent proxy ? Switch ? Router ?
0
ropetinAuthor Commented:
The box that is running the squid proxy is the router.  I have the users connected via a generic workgroup switch.
0
robocatCommented:

Have you compared the router (redirection) settings with the other 6 proxies ?

Perhaps you should look at what kind of logging you can enable on router level ?

0
ropetinAuthor Commented:
By router settings you mean the iptables configuration?  I don't 100% understand iptables, but I don't see anything that would make it drop unresolved IPs.  Any suggestion how I can verify?
0
Jozk0Commented:
This might be a browser specific issue. Look here:

http://www.visolve.com/squid/whitepapers/trans_caching.php

Go down to the section "Disadvantages of Transparent Caching"
0

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
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
Networking

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.