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microsoft network internet issue

Hello I have a network that is running slow to teh internet. it is sometimes the speed of dialup, or as fast as t1, but mostly the slow. it is a fractional t1, and I have contacted teh isp, and they say everything is fine on there end? any help
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eberhardt2329
Asked:
eberhardt2329
1 Solution
 
pgm554Commented:
If you have an SLA ,you should be able to look up online, any, and all issues regarding your bandwidth issues.
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dsstaoCommented:
This could be the result of a number of problems: open relays, spyware, virii, large emails or uploads/downloads, etc...  If your switch is managed, try looking for high usage on a particular port, then examine that PC for problems.  If all looks well there, after-hours, unplug all but one PC and try pings (i.e. ping -t www.cdw.com) to see how consistent your response times are.  If you are running a mail server, please check it for being an open relay.  Here's a good site to do this with: http://www.abuse.net/relay.html.

After some of this troubleshooting, post your results and we'll go from there.
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MrArubaCommented:
Is there any pattern in bandwith loss? Like at certain times, when user(s) use a particular program,...??
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ViRoyCommented:


hmmm, well first i would determine the exact up and down speed you are getting. use http://www.broadbandreports.com/ to determine this.

if you discover that you are not near the expected speeds, then you should first isolate the server so it is the only thing connected to the internet. make sure theres no unexpected traffic from/to your server.... if you discover unexpected traffic, then i would have reason to suspect spyware/hacking... repair the server OS

if you are below expected speeds and do not suspect spyware/hacking, request the ISP perform a loopback test to the router. this will do a speedtest from your router to their internet gateway.

if they show expected speeds yet you still are not getting those speeds on the internet, the problem lays somewhere inbetween your gateway to them(your ISP), and their connection to internet servers.

keep in mind you are limited by the slowest connection of the entire route. so if someone access your server with a home DSL connection, theres no way they will be able to get T1 speeds.
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Tim HolmanCommented:
You could be swamped with viruses ?
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cooleditCommented:
hi, there

better draw your LAN/wan design + configuration..

WAN / Internet ? Equipment
VPN Static IP or NAT or else
LAN Equipment

Is your LAN/WAN over NAT, is it contolled by internet sharing
where is your DNS server involved.
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