On Fri, Oct 23, 2015 at 12:22 PM, Gert Doering <g...@greenie.muc.de> wrote:
> Hi, > > On Fri, Oct 23, 2015 at 01:48:34PM +0200, Jan Just Keijser wrote: > > I've just read the entire thread and the original "bug report" from the > > IT department - there's a lot of information that is missing. > > Can they rule out either OpenVPN or the Konica Minolta thing? > [..] > > OpenVPN nor printer drivers remove printer connections "by accident". > > In general not. I do have seen cases with these newfangled win7 > "all is automatic!" printer drivers when "out of the blue" printers that > had been previously auto-discovered just disappeared again. > > I never investigated in detail, but my gut feeling is that "VPN is up" > makes some part of windows declare "oh, we are on a new network now!" > and some particular daft printer driver programmer interprets that as > "oh, forget everything and do new autodiscovery... oh, what, two > active network cards? this is not something people will ever use in > real life, so just error out...!" (or it tries printer autodiscovery > on the tap adapter, does not find anything, and removes all the "no > longer existing" drivers) > > But this is all just hearsay and interpretation, I have no facts to > back that. > > If this can be reproduced, I'd take it up with Konica Minolta - OpenVPN > will never ever mess with your printers, but it *will* present a "new > network card"... > To add to that, one way we have seen printers disappearing, I believe, is by automatic "refresh" of printer drivers by unsupported versions. E.g., a working printer on Windows 7 suddenly gets a wrong driver because of " autodiscovery" or whatever that is called.. When that happens the printer setup is still there but does not show up in the UI. A reinstall often complains of printer already exists until one tries all kinds of gimmicks to start from a clean slate again. With our universal hatred for windows never investigated in detail.. But this has nothing to do with OpenVPN. I would check what new subnets are being accessible by the VPN connection and whether there is any machine in there that could push wrong drivers with impunity.. Assuming the client network is not in your control, you could also firewall everything except the SQL server traffic to the client -- or filter the traffic and look for any unwanted packets. Selva
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