Our local network users run an in-house application that downloads application builds (typically several gigabytes of executables and DLLs) to the user’s %AppData%\CacheDir directory. We use the Bittorrent protocol to speed up deployment over the LAN. However the Sophos scanner renders the performance abysmal; downloads are about 20 to 50 times slower when it’s active. I suppose this is caused by the files being changed regularly as new chunks are being downloaded, which is understandable behaviour from a virus scanner, but also the expected behaviour of a Bittorrent client.
Both our application and the binaries it downloads can be fully trusted, and we must absolutely avoid the overhead described above.
I could not find a way to exclude each user’s %AppData%\CacheDir directory and its subdirectories from scanning (except by adding the same line dozens of times, for each user, and maintaining the list each time we hire a new person…) . I understand that environment variables are not supported (and that the service can’t really evaluate them anyway). However we’re faced with this problem where the antivirus is just preventing everyone from working properly, and so far the only practical solution we’ve found is to exclude C:\Users from scanning (which kinda defeats the purpose of having a scanner at all).
Any suggestion on how to bypass the limitations?
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