identifying .dwg and .one files in gmail attachments

[Support SwarajComm <support () stpl co in>]

Hi,

I have requirement like this. Need to block .dwg and .one files in mail
attachment. I can implement firewall policy to block mail attachment with
file signatures 41433130 (for .dwg files) and
E4525C7B8CD8A74DAEB15378D02996D3 (for .one files). I am able to see these
file signatures in all mails sniffer except gmail. Gmail is doing some
encryption. What is the way to identify these files when using gmail. If I
know some keyword related to these file types in gmail I can implement
firewall policy to block that pattern. Any ideas?

Regards,
Siva K

___________________________________________________________________________
Sent via:    Wireshark-users mailing list <wireshark-users () wireshark org>
Archives:    http://www.wireshark.org/lists/wireshark-users
Unsubscribe: https://wireshark.org/mailman/options/wireshark-users
             mailto:wireshark-users-request () wireshark org?subject=unsubscribe