Edit: This is not a question about DDOS, but a question about how to resolve a technical issue impacting only Mac clients of Outlook Anywhere.  Problem and solution are are now known, but I cannot link it here for some stupid reason of stackexchange limits.  I can suggest googling : "outlook anywhere We Get to Use Commandlets" and you should find the problem and solution described at charlietree.com  Original question follows...  I'm not a Mac user, nor the Windows Admin, so forgive me if I don't have the the nomenclature correct, but I'm trying to help another admin.  We run Active Directory and Exchange 2010.  The name servers for our Internet top level domain are Linux with Bind.  A subdomain like ad.example.com is the domain for AD, Exchange, etc.  In an attempt to prevent the DNS service on AD from being abused with DNS reflection DDOS attack method, port 53 was blocked at the firewall. It has the effect of blocking off site users with Mac Outlook from syncing with Exchange.  Blocking port 53 seemed the only way to go because disabling recursion on the Windows DNS causes failures to access the outside world, and unlike Bind, there is no feature like views.  Are other sites finding this is a problem, or does it hint of a configuration problem?  The admin mentioned that when traced, the connection information (perhaps with autodiscovery) came back with the address like exchange.ad.example.com, while the exchange server is also known as an address like exchange.example.com. He isn't sure if there is some place in the configuration to fix that.  The idea being if we can get the "ad" out of the host name, the Mac Outlook client would not need to talk to the DNS on AD.  Our Goal: to block AD's DNS servers from DDOS abuse.  Our problem: Mac Outlook clients require access to AD's DNS when off site.
This is a  about DoS and DDoS mitigation.   I found a massive traffic spike on a website that I host today; I am getting thousands of connections a second and I see I'm using all 100Mbps of my available bandwidth.  Nobody can access my site because all the requests time out, and I can't even log into the server because SSH times out too!  This has happened a couple times before, and each time it's lasted a couple hours and gone away on its own.  Occasionally, my website has another distinct but related problem: my server's load average (which is usually around .25) rockets up to 20 or more and nobody can access my site just the same as the other case.  It also goes away after a few hours.  Restarting my server doesn't help; what can I do to make my site accessible again, and what is happening?  Relatedly, I found once that for a day or two, every time I started my service, it got a connection from a particular IP address and then crashed.  As soon as I started it up again, this happened again and it crashed again.  How is that similar, and what can I do about it?
I looked at MyAnimeList, there is a classic series, it's Devilman, had an anime adaptation in January 5th, 2018. I am interested to watching this series. Quick search for these series, it has a lot of adaptations since 1970's.   Do I have to watch all of those serieses before started to watch Devilman: Crybaby? Are these series unrelated to the past series?  Note: I have never watched or tried to watch this series, so I have no idea about this franchise. I am trying to learn how to find the product of non-disjoint cycles, as you may have guessed from the title. I have the basic idea, but I do not understand it entirely.  I am trying to find $(1352)(256)$ and $(1634)(1352)$, multiplying from right to left.  Please give me some hints/suggestions.  Thank you. Monotonicity of the sequences $\left(1+\frac1n\right)^n$, $\left(1-\frac1n\right)^n$ and $\left(1+\frac1n\right)^{n+1}$ How to find all graph isomorphisms in FindGraphIsomorphism A word similar to "Donate" but more freely provided to Up until now, I implemented all-against-all collision detection in my games. It worked fine.  But I reached a point where implementing this kind of collision detection, makes the game run poorly, because there are two many objects to iterate through and check for collision.  I have searched this site and found something about 'uniform grids'. But I didn't completely understand what it is and how to implement it. Tried to Google it but nothing easy enough to understand came up.  I am a beginner to 2D-game programming. Do you mind trying to explain to uniform-grids, or link me to some good tutorial?  Thanks a lot Is the above statement true? If I have already proven that the set is linearly independent, is it automatically given that the subset is also linearly independent? If so, how would I go about showing that as a proof. In the LoTR movies (not sure if the books are the same) but when Gollum lost the ring to Bilbo decades ago in The Hobbit, he appeared to look the same and even move the same in The Fellowship of the Ring. Bilbo on the other hand, seemed to have aged very rapidly when he passed the ring to Frodo. When Frodo met up with Bilbo in Rivendell shortly after his quest began, Bilbo appeared much older and even more much slower.  I realize that Gollum had the ring for much longer than Bilbo, but wouldn't him losing the ring have the same effect as it had on Bilbo? In the 70's or 80's I read a short story in which 2 astronauts looking for a nice place to eat lunch choose a spot at the pole of a small desolate planet, overlooking the world's only pool of surface water.  Due to the harsh extremes of heat, and lack of water, this is the home of the planet's single living organism, which has grown slowly over eons,  surviving the daily extremes, moving slowly over the bare rock, dissolving it with acidic digestive juices to get the nutrients it needs for survival. The men watch the organism while eating their lunch, then depart, unknowingly leaving death behind them in their garbage - cigarette butts, tin cans, wrappings - a bonanza that the creature moves over to dissolve and ingest, along with the human-based microscopic organisms that will destroy the alien being. The theme of the story is that although we reach out to the stars to seek life, we are much more connected to the lowest forms of life on Earth, than to any life we may find on other planets. I don't remember the author and title.  Can someone identify the story? Show in linked/related questions sidebar whether a question has answers or not Currently, in the linked/related sidebar, without opening the question the user can only distinguish whether the question has an accepted answer (green icon) or not (grey icon).  I often eagerly open an interesting-sounding question with a grey icon, only to find myself disappointed because it has no answer yet.  To avoid this, I suggest adding a third type of icon for questions that have at least one answer, but no accepted one. Probably a darker/lighter icon or some kind of frame or glow. I've made a quick example with Paint (if relevant, the screenshot I used is from ). I'm in no way satisfied with the look of it, but at least it demonstrates the general idea.    What do you think about this proposal? Would it be a useful addition to the StackExchange interface? Remove Sender name ( not email address) from outgoing Mac Mail How do you associate the .exe file extension with a program in Windows? Convert timestamps with offset to datetime obj using strptime What does the explicit keyword mean? Is there a way of conditionally triggering a compile-time error in verilog? I have a parameterised module in verilog, where the parameters are a clock rate and refresh rate, which is used to calculate how many cycles of inactivity are inserted between instances of a repeating operation.  However, it is very easy to set parameters that cannot be attained (because the operation takes a non-trivial length of time, so the repeat would have to occur before it had completed), and at the moment the design does not give any feedback on this.  I was wondering if there was some way I could trigger an error during synthesis (or compilation prior to simulation) if the conditions cannot be met (i.e. if one localparam is less than another)?  Some equivalent of the popular C/C++ compile-time-assert hack, perhaps. How to install WhatsApp? Why are there so many close votes to review and so few of the others? Does a family of a distribution have a different definition for statistics than in other disciplines?  In general, a  is a set of curves, each of which is given by a function or parametrization in which one or more of the parameters is varied. Such families are used, for example, to .  For statistics, a family according to  is the result of varying the shape parameter. How then can we understand that the gamma distribution has a shape and scale parameter and only the generalized gamma distribution has, in addition, a location parameter? Does that make the family the result of varying the location parameter? According to @whuber the meaning of a family is implicitly A "parameterization" of a family is a continuous map from a subset of ℝ$^n$, with its usual topology, into the space of distributions, whose image is that family.  What, in simple language, is a family for statistical distributions?  A question about relations among of the statistical properties of distributions from the same family has already generated considerable controversy for a  so it seems worthwhile to explore the meaning.  That this is not necessarily a simple question is born out by its use in the phrase , which has nothing to do with a family of curves, but is related to changing the form of the PDF of a distribution by reparameterization not only of parameters, but also substitution of functions of independent random variables. I've tried several things already,  std::stringstream m; m.empty(); m.clear();   both of which don't work. Imaging new hard drive in Windows 7 laptop? I'm upgrading my Windows 7 laptop to a new hard drive.  How can I clone or image the old hard drive over to the new hard drive, so that it looks like nothing has changed (other than the new hard drive) to my operating system and applications?  Can I use what is built into Windows 7 Backup or should I use something else?