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Troubleshooting Internet slow issues

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Troubleshooting Internet slow issues

Postby chicagotech » Sun Jan 24, 2010 12:15 pm

1. First thing to try is check DNS settings.
1) Use nslookup to check any DNS errors.
2) It is recommand to use an internal DNS if you have domain network or your ISP DNS. One of my friends went to China and setup a local DNS serivce. When he came back to US, accessing the Intrenet is very slow.
3) If you use an internal DNS, make sure the Forwarders setup correctly. please refer to this post: Accessing Internet slow after installing windows 2008 - viewtopic.php?f=1&t=9330&p=14476#p14476

2. Scan any virus or spyware. Refer to this page for more details.
Slow Internet AccessSituation: The client reported that their access to the Internet very slow while the LAN speed seemed OK. Troubleshooting: 1. When testing by ping each ...
http://www.chicagotech.net/Security/slowintrenet1.htm

3. Modify the MTU on the computer or the router. PLease refer to this page.
How to determine the optimal MTU
In a case you may need to modify the MTU size and wonder how to determine the optimal MTU for your system. You can use ping command to do so, for example, ...
http://www.howtonetworking.com/VPN/mtu4.htm
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
chicagotech
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