Domain Login Slowly

Here's my situation. I've got a router that's branched off of our central routing equipment. I have it split off because I have to have multiple PC's running at my desk, however there is only one ethernet line to my desk. My issue with this is that only one of my PC's can actually login at a high rate of speed while all the rest take at least 20 to 30 minutes to login. Local logins on these computers takes no time at all. It's only domain logins. I'm not sure if something got screwed up on the router, however nothing on it has been changed since it was orginially in place. I've tried different ports, cables, and computers with all the same results. Even my virtual machine takes forever to login to the domain even though it's on the computer that is running fine. I hope this makes sense because I've been trying to figure out this problem myself, but don't really know how you would google search this answer.

Your help is appreciated.

Nathan
murphyinsAsked:
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ryan_johnstonCommented:
Make sure the computers can contact the DNS server and have the right DNS information in the network settings.  If they can't contact the DNS server for the domain then they will take forever.  Just a good place to start if you haven't already.
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murphyinsAuthor Commented:
The computer the is moving quick can contact DNS through that same router so I'm unsure why nothing else is working.The slow ones if you login locally can ping the DNS server no problem. I would have a switch in place here, however that would require a crossover cable which will not work if the port on the wall is already set for standard ethernet.
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ryan_johnstonCommented:
Well as long as you can ping the DNS server that shouldn't be the problem, unless the connection is taking forever.  What are the ms ping times?  Also, are they roaming profiles?  If they are massive profiles and on a slow connection then it would take an extremely long time as well.

Have you tried recreating the domain profile on the local machine (if they're not roaming profiles)?
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murphyinsAuthor Commented:
Ok so by disabling the router's firewall which was enabled before and was working without issue was the problem. I'm not sure why that would randomly cause it to stop working for every computer except the one.
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necromiserInformation System Security ManagerCommented:
Not sure what router you're using, but some have the capability to detect flooding.  It may see the additional hosts trying to flood the connection.  From what I've read it looks like a configuration issue.
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Kyle DaviesRetail Software SpecialistCommented:
Just go and put your domains dns setting is manually.
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murphyinsAuthor Commented:
The DNS information is manually entered into the router. The router is a Linksys Etherfast Cable/DSL Firewall Router.
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Don ThomsonCommented:
Why are you running on a router - all you need is a dumb switch - What you are doing is putting your PCs into a separate subnet as you domain - First one works - second ones get all confused - Router will not let you configure the LAN port and the WAN ports on the same subnet

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murphyinsAuthor Commented:
As far as why is the router setup, I'm not sure because it was setup before I started working here. Secondly, I tried a switch before, however it told me limited or no connectivitiy and I believe this happened because there isn't a crossover cable between my workstation and the primary switch. How do you setup switch to switch if there is an ethernet port that is plugged into the switch? If you can tell me that, I'll be more than happy to get rid of this router. I've been wanting to put a switch here instead for awhile now.
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ryan_johnstonCommented:
Connecting two switches you need a crossover cable, but connecting the machines to those switches would use a normal patch cable.
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murphyinsAuthor Commented:
Here's some more details I forgot to mention. Between the wall port and the router is my VoIP phone. Would I be able to hook up a switch to the phone without using a crossover? If not how would I be able to setup a switch?
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Don ThomsonCommented:
1.pretty well all switches today are autosensing and shouldn't require a crossover cable

2.If you plug one of your PCs directly into  the wall - (bypass your router) - can you get on the network ?  Assuming you have servers etc can you access all of them and the internet?
Is your network adapter set for static or dynamic IP  (Automatically Obtain)
IF it is static then you are going to have major problems going through a router - If it's dynamic and you can connect without the router on one machine - then either the MAIN router or one of your servers is providing the dynamic IP. If this is the case then just hook up via a switch - make sure all the PCs are Dynamic and everything should work -  

If your network requires a static IP for all workstations then your system administrator should be assigning you whatever IPs your need for each PC -  Putting a router behind a router is asking for problems
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Don ThomsonCommented:
As far as your Voip phone is concerned - most of those work behind a main router - so using a switch should work - Again get a $30 switch and your shouldn't have to worry about crossovers - only the really old switches needed crossovers as did the old hubs
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murphyinsAuthor Commented:
The switch I tried didn't work so my guess is that this one doesn't have autosensing however I was planning on bringing in a switch that I had laying around to see if it would work. I also tried using the uplink port on the switch that I tried with no luck. I will have to try again tomorrow. All of my computers will gain internet and basic network access, however Symantec will not deploy to the other computers because it doesn't know how to reach them.
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murphyinsAuthor Commented:
That worked. Sorry for taking so very long. I finally was able to get a switch into our office to test it out. All I had to do was replace the router with the switch and do a quick reboot and everything was fine.

Thanks again,

Nathan
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