Jim

Aug 212017
 

We recently ran into a problem where a customer became unable to access the FTP site of a partner. They had been accessing this FTP site regularly for years. About two weeks ago, it abruptly stopped working. When connecting via any FTP client in either Active and Passive modes, they were unable to login. The customer is using the Comcast provided router/modem with a static IP.

At first look, it appeared as if the partner was blocking them since we were able to connect from our office and from other locations. During our testing, the customer was able to connect to other FTP sites fine. We did find, however, that they were unable to connect to any FTP site hosted by Network Solutions. Their partner’s FTP site is also on Network Solutions.

Comcast replaced their modem/router and the problem persists. Here’s the kicker: We put a laptop behind their device with the static IP and it worked.

Comcast then switched the customer to a Dynamic IP, and it now works. At this point, I can only conclude that an upstream Comcast router on the static IP network is mangling FTP traffic to some hosts. I’ll update this post when I know more.

 Posted by at 9:01 am
Mar 022017
 

Most everyone has tried the flash based SpeakEasy Internet Speed Test. Recently, SourceForge introduced a HTML5 speed test that doest not require Flash or Java. It works on all devices including tablets and smart phones without needing to install an App.

You can try it here: https://sourceforge.net/speedtest/. The image below is for a Verizon Fios Business connection with advertised speeds of 25 Mbps up and down.

Source Forge Internet Speed Test

 Posted by at 12:22 pm