Thanks to your persuasive skills, the medical instrument company took a few days

Question

Thanks to your persuasive skills, the medical instrument company took a few days to improve its cable management practices. That%u2019s fortunate, because
now, several months later, it has just won a huge contract and its network will expand. The brand-new warehouse is busy with activity. The inventory shelves are being stocked to the ceiling. Nearby, machines that carry merchandise along a conveyor belt are
working nonstop. However, the company has a new problem: since production has stepped up, several inventory specialists in the warehouse are complaining that occasionally their handheld computers will not connect to the network or that they suddenly lose their
connection. It%u2019s especially frustrating because more personnel than ever are trying to use the network. What could be causing the handheld computers to experience intermittent connectivity problems? What can you do to rule out the possibility that the handheld
computers are simply faulty?

Explanation / Answer

This problem occurs because Transport Control Protocol/Internet Protocol (TCP/IP) Internet Protocol security (IPSec) frames that pass through NAT-T are not correctly acknowledged by TCP/IP.

This problem has been reported to occur on computers that have one of the following network adapters:

Next time it happens you should load up the Services control panel (search: services in start menu) and check through the list for any that would relate to wireless or networking.

Some common ones to look for are:

There may be others specific to your wireless hardware vendor.

Go through each of these in turn and restart them (little green & black |> symbol in the toolbar). If and when the network starts working again we will have identified the culpret.

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