I seem to be having problems with Sophos AV marking emails as encrypted. It seems to be mainly emails with .xls attachments but when looking at the email or the attachment cant see why the email is being marked as encrypted. This is not all emails with xls attachments but the odd 1 or 2. We also have Sophos saying some xls files are unscannable.
We also run McAfee on the same boxes and they are marking the emails as clean and having no problems scanning the emails.
We currently set all encrypted based mails to be quanrantined. Would also like peoples views on this should we let them through or block/stop them getting through to the user?
"We currently set all encrypted based mails to be quanrantined. Would also like peoples views on this should we let them through or block/stop them getting through to the user?"
We don't quarantine such encrypted mails and let them through to the recipient. We think, someone that need the knowledge about decrypting a file with the matching password knows the sender, the content and the risk about a possible infection. (In addition, we have a antivirus-program on every PC.)
>>@igork: >>I'm just curious: What is the advantage of your process?
We are goverment office. Our users is not "computers guru" and they CAN open attached file from unknown sender. And some viruses use zip file with password. Of course, we have antivirus on users workstations as well, but I preffer to catch such file on gateway and release them according request (we have 5-10 such requests per month for 1200 mailboxes)
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...