Using a USB wireless adapter to solve connection woes Protecting DNS servers from hackers;

* Dr. Internet columnist Steve Blass offers advice on using a USB wireless adapter to solve connection woe * Help Desk columnist Ron Nutter offers advice on protecting DNS servers from hackers

* Using a USB wireless adapter to solve connection woes

By Steve Blass

Q: I have Roadrunner service and use a Motorola cable modem, which has an Ethernet plug and a small, roundish plug that has a USB plug on the other end. I bought a D-Link wireless router that works fine through the Ethernet cable, but I can't get Connection speeds on my laptop are intermittent and very slow, even though I have rebooted both routers several times and reinstalled my wireless laptop drivers. I would like to use the desktop to control my HP printer. Any thoughts?

A: Check your cable modem manual. I don't think you can use the Ethernet and USB connections at the same time.

To read Steve's response in its entirety, please click here.

* Protecting DNS servers from hackers

By Ron Nutter

Q: Our network is protected by a firewall but my predecessor put both the primary and secondary DNS servers that resolve our domains to the outside world outside of the firewall protecting our network. What is the best way to protect our DNS servers from unwelcome visitors?

A: There are several things that you can do to prevent problems. I would recommend putting the DNS servers behind your current firewall and give them a public IP address. When allowing port 53 through the firewall, be sure to allow both TCP and UDP through. I learned this one the hard way the first time I put DNS servers behind a firewall. There were intermittent problems in DNS resolution until both TCP and UDP were allowed through the firewall for port 53.

To read Ron's response in its entirety, please click here.

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