Connected to internet, web pages won't load windows 7

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unoriginal1

unoriginal1

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Hello all again,

Having a strange issue on a machine on our network. It's the only machine affected at this point so I don't believe it's an issue with our dns.

The machine is running win 7 pro, is connected to the network just fine. But no matter what browser is used the page will time out and acts as if there isn't a connection. I can ping the websites. Cnn, google, yahoo etc. Did a tracert and it checked out just fine the traffic looked fine. When I manually type in the ip of the site I have slightly more success.. What I mean by this is for example if I type in the ip for google it loads about half of the page. Googles logo is missing but it loads the search bar?... Very confused. My only thought here is some sort of bug/software causing problems. I have our antivirus scanning now and am going to do a malware bytes scan here shortly, but with that being said. The end user is very much so by the books and I know she is not an individual that would be doing personal browsing so I don't see how she could of gotten something nasty.

Her machine was working fine up until yesterday when they moved her desk. I checked and re checked that everything was plugged in properly. The way it's set up is her main connection comes into a shortel phone, then a pass through cable to her machine. Is there a possibility that a cable could of gotten damaged where it would cause something like this? I tend to believe if it was a damaged cable it would have 0 connectivity and not just an issue loading web pages. But that's why im posting I know ya'll have seen the weird of the weird and looking for any and all tips!

Worth noting ive released and renewed the ip, tracert, pinged the sites urls, also she seems to have a delay on the network in regards to email, remoting into other systems she needs on the network etc. So maybe it is a cable issue..

Thank you,


Uno
 
Solution
Solandri

Sounds like the network passthrough on the phone is defective. Ping uses raw IP packets, so as long as the packets get through, you get a ping. It might be mangled, but as long as the data is recognizable ping will work.

HTTP (web traffic) normally uses TCP, which has...
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unoriginal1

unoriginal1

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No sir,

I swear every time I post on here I find the issue. Or at least think I do. Might have to make it my normal process on issues to post so I can figure them out! When I removed the phone from the equation and hardwired to the desktop she now has the snappy response she should and web pages are loading without issues. So something within the phone was causing the issue.. Not a clue on how to troubleshoot this thou. Any knowledge with Shortel Voip phone systems?


Uno
 
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Solandri

Solandri

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Jan 4, 2012
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Sounds like the network passthrough on the phone is defective. Ping uses raw IP packets, so as long as the packets get through, you get a ping. It might be mangled, but as long as the data is recognizable ping will work.

HTTP (web traffic) normally uses TCP, which has an error correction layer. Each packet is checked against a checksum, and if the two don't match the client (your computer) asks the server (the website) to re-send the packet. If something is consistently corrupting the data, then this can cause subsequent packets to continually fail their checksum. Data flow effectively freezes. If this continues long enough, the client and server get out of sync, until a timeout period (usually 2 or 5 min) and the client either gives up (server unreachable) or re-initiates the connection (tries to reload the page from scratch).

That sounds like what you're describing with the Google homepage, where half of it loads but the rest of it doesn't finish loading. The packets for the first half got through without errors, but the data corruption began with the second half. Try giving the phone a good whack with the palm of your hand and see if that shakes the loose part causing the noise back in place. If that doesn't work, you can try taking it apart and inspect for shorts or try tightening down any loose connectors you see. Failing that, just get a small switch and give the phone and computer their own dedicated network cables. No pass-through stuff.
 
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unoriginal1

unoriginal1

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That makes perfect sense Solandri, Also makes sense that it occurred after they moved her desk. Could be they weren't as gentle as needed and messed something up on the pass-through port on the phone. I've brought the phone back to my office to test it against my machine and see if it replicates the same issues.

Thank you for the suggestion with the switch as well. Only issue i'll have there is I need a POE capable switch and I'm running low on such devices. I have plenty of dumb little dlink switches that would work for a desktop and unfortunately the buildings here are a royal pain to run new drops from the existing switch. Either way I'll figure out a work around. Appreciate both of ya'lls help. Wished I could give you both a marked answer for your efforts.

Uno
 
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Solandri

Solandri

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Do you:
1. Have access to the main switch where all these in-room network drops connect to the main network?
2. Would be OK with just 100 Mbps speeds instead of Gigabit?
3. Have ethernet crimping tools?

If the answer to all three is yes, then you can actually convert the single network drop into two 100bT network connections. 100bT only needs 2 pairs (4 wires), whereas cat5 cable has 4 pairs. (Gigabit needs all 4 pairs.).

What you do is take an ethernet cable and cut off the RJ45 jack at one end. Separate the wires into 2 sets of two pairs. 100bT only needs pins 1, 2 (one pair) and 3, 6 (second pair) connected on the jack. The other pins are unused.
http://wiki.networksecuritytoolkit.org/nstwiki/images/thumb/Lan_cable.png/964px-Lan_cable.png

So you use one set of two pairs for the network connection to the phone, the other set of two pairs for the network connection to the desktop. Plug that cable into the wall. In your network room where the cables come out, you do the same thing. Plug the fully-connected RJ45 jack into the breakout box in the network room, plug both the half-connected RJ45 jacks you've made into the switch.

And there you go - you're transmitting two 100bT network connections over a single cat5 cable.

Edit: LOL guess I'm too used to wiring these things myself. If you don't have network crimping tools, they sell these adapters pre-made. Just be sure to get two of them. One plugs into the network drop in the room, the other plugs into the network room where the wall drop comes out (i.e. you need to plug two ethernet cables from the main switch into this device).
http://www.amazon.com/C2G-Cables-37133-Splitter-Combiner/dp/B000Q5UMEI
 
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