LS,

since we released the new DICOM Network Analyzer 3.2.6, we have had multiple positive comments from users that they thought this new version was much more stable than the previous versions. We are of course very happy with these kind of comments.

On some specific systems however, people have reported the loss of packages when capturing with the DICOM Network Analyzer. This results in an incomplete byte stream resulting in displaying incomplete information about DICOM associations taking place. The same problem (incomplete byte stream) has also has been reported when people used WireShark on these systems. Most systems do not have this problem, so it appears to be a system configuration problem. The thing that the DICOM Network Analyzer and Wireshark have in common is the WinPCap library used.

The following two forum topics have been found in the WinPCap forum by one of our team members:
Q-21: My application doesn't see any traffic being sent by the machine running WinPcap.
A: If you are running some form of VPN client software, it might be causing this problem; people have
seen this problem when they have Check Point's VPN software installed on their machine. If that's the cause of the problem,
you will have to remove the VPN software in order to make the application see outgoing packets.

Q-10: Does WinPcap work in connection with personal firewalls?
A: We got several reports saying that WinPcap does not work well if a personal firewall is installed on the same machine as WinPcap.
The typical problem is the impossibility to capture all or part of the traffic from an adapter, but some users reported strange behaviors (like some packets disappearing) on the transmit side too.
Most of the times, the problem is caused by non-standard interactions between the firewall and the network stack of the OS, so there not a lot to do on our side; the suggested remedy consists in uninstalling the firewall.
Note: uninstalling, and not disabling, because some firewalls (like ZoneAlarm) keep having strange behaviors even when they are disabled.

We would like to know if you have experienced simular problem with the 3.2.6 version. And we are very interested if someone has found a solution for this problem.

Regards,

Marco