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We are currently working with an IBM workflow application called FormWave and running an electronic approval system.
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Currently we are working at home and using VPN((wifi at home).
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We are struggling with the investigation because there is a problem that the file is damaged when uploaded via VPN.
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Corruption means that when viewed with a binary editor, some data becomes zero bytes.
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-Environment and Conditions
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・App: IBM FormWave for WebSphere 6.1.2.3
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・Middle: IBM WebSphere Application Server 7.0.0.13
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・DB: IBM DB2 9.7.3
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・OS: IBM AIX 6.1 TL7 SP6
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・VPN: 2 channels(VPN1, VPN2) via wifi at home
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*Not occur
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・Internal network(company)
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・Tethering(via VPN) from iPhone which is provided by company
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-Steps
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① Convert to PDF file written in Japanese on PC
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② Save the PDF file as an attached file to the electronic approval that is connected by vpn
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③ Download the file saved in electronic approval on your PC
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-Problems
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When opening the file attached to the electronic approval via VPN(wifi), the following events occur.
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・Color unevenness of image data (ex. the background becomes greenish)
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・Characters are faint
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・Font cannot be read and characters are not displayed.
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・Error displayed when opening a file
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・occurs only at PDF files and other files like Excel, word are displayed correctly.
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・different results between VPN1 and VPN2 and VPN1 occur less events.
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Currently we are investgating the proxy and VPN differeces between VPN1 and VPN2 because there are different results from both VPNs
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We found large sized files may occur events more frequently than small sized files.
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There is regularity in the place where the replacement by zero occurs.
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Although it is different from the replacement part, it has the common point that the size of the replaced data is
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always 5 bytes. There are cases where replacement occurs with less than 5 bytes
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but it occurs when the data before replacement was originally zero.
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What could be the cause?
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Any help would be appreciated.
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-The image is binary data comparison.
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left is original and right is uploaded file. blue parts are turned to red parts(00 byte)
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