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  • Is it safe to enable forced ASLR via EMET on Windows?

    - by D.W.
    I'd like to enable forced ASLR for all DLLs on Windows. Is this safe? Background: ASLR is an important security mechanism that helps defend against code injection attacks. DLLs can opt into ASLR, and most do, but some DLLs have not opted into ASLR. If a program loads even a single non-ASLRized DLL, then the program doesn't get the benefit/protection of ASLR. This is a problem, because there are a non-trivial number of DLLs that haven't opted into ASLR. For instance, it was recently revealed that Dropbox injects a DLL into a bunch of processes, and the Dropbox DLL doesn't have ASLR turned on, which negates any ASLR protection they otherwise would have had. Unfortunately, there are many other widely used DLLs that haven't opted into ASLR. This is bad for system security. Microsoft provides several ways to turn on ASLR for all DLLs, even ones that haven't opted into ASLR: On Windows 7 and Windows Server 2008, you can enable "Force ASLR" in the registry. On all Windows versions, you can use Microsoft's EMET tool and enable EMET's "Mandatory ASLR" option. These methods are possible because all DLLs are compiled as position-independent code and they can be relocated to a random location even if they haven't opted into ASLR. These options will ensure that ASLR is turned on, even if the developers of the DLL forgot to opt into ASLR. Thus, forcing on ASLR systemwide may help system security. In principle, turning on forced ASLR could potentially break a poorly-written DLL, so there is some risk of breakage. I'm interested in finding out just significant this risk is. I have the suspicion that this kind of breakage might be extremely rare. Here's what I've been able to find: Microsoft has done compatibility testing with several dozen widely used applications. The only one they found where Mandatory ASLR causes problems is Windows Media Player. All the other applications continue working fine. (See pp.39-41 of this document.) I've seen some anecdotal reports that enabling "Mandatory ASLR"/"Force ASLR" is fine and unlikely to cause problems. CERT reports that AMD and ATI video drivers used to crash if you enabled forced ASLR, but their latest drivers have now fixed this problem. They don't show any other drivers with this problem. A forum post from Microsoft shows no other applications with compatibility problems if ASLR is forced on, as of 2011. A user reports that borderlands.exe, a video game by Gearbox Software, crashes if you turn on mandatory ASLR. What else should I know? Is it relatively safe to turn on Force ASLR / Mandatory ASLR systemwide to harden the secuity of my system, or will I be in for a world of pain and broken applications? How significant is the risk of compatibility problems and broken applications?

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  • Tracking SQL Server 2008 Timeout Errors

    - by SDReyes
    we got some connections timeouts running a stored procedure in a SQL Server 2008 instance. after a while, the DB started to work as usual, and there weren't any additional timeout errors. So I'm trying to get additional info about the error. Does SQL server 2008 have any kind of error log that I can look into? Do exist any auditing/logging features that I can activate to trace the error (if it happens again)?

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  • How to map a user to a domain, with Usermin and Postfix?

    - by HappyDeveloper
    What I need is to create a couple of websites, each one with only one user, which is allowed to send mails from any address @ his own domain. Example: Site foo.com would have an user foo, which can send mails from [email protected]. Currently, when the user logins to Usermin, the default 'from' field is example-dns.net (editable) I want it to show an editable field for the user part, and @foo.com (non editable) So how can I do this? Is there some way to automate this?

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  • How to map a user to a domain, with Usermin and Postfix?

    - by HappyDeveloper
    What I need is to create a couple of websites, each one with only one user, which is allowed to send mails from any address @ his own domain. Example: Site foo.com would have an user foo, which can send mails from [email protected]. Currently, when the user logins to Usermin, the default 'from' field is example-dns.net (editable) I want it to show an editable field for the user part, and @foo.com (non editable) So how can I do this? Is there some way to automate this?

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  • DCHP and Router load testing

    - by John H
    I manage a campground wifi network with an average of 10 - 60 active users. I have encountered issues where the router starts acting flaky (failing to assign DHCP or failing to pass traffic) without any clear warning (low cpu utilization, etc). I upgraded the router a couple times and ended up with a Netgear ProSafe VPN router that seems to be handling the traffic. The interesting thing is that the Netgear has lower specs than the Buffalo router it replaced, indicating the issue is with the DD-WRT firmware. While I'll be pursuing this issue on the dd-wrt forums, I need a way to test routers. My vision is having 1-2 computers connected on the LAN side and 1-2 computers connected on the WAN side. I want the LAN computers to be generating various type of traffic and connections, as well as requesting DCHP addresses. A few notes: The wireless aspect should be a non-issue. Most clients would connect to a wireless bridge and come into the router through a network cable. I had a monitoring server with Nagios running check_dhcp against the router. This server was connected directly by a network cable, eliminating wifi bridges and other devices from the equation. This question is somewhat related, but not exactly: Load testing wireless LANs I am going to look at IxChariot. While I'd ideally like to use a 1 computer on each side running Linux and preferably free software, I can entertain running Windows, multiple computers, or non-free software. Total bandwidth doesn't seem to be the issue. I can transfer large files all day. Even on the busiest days, the users seemed to only pull ~5Mbps. There is very little "LAN to LAN traffic" and most of it might never have reached the main router. The issue I need to test for seems to be tied to active users, or more appropriately, active sessions. I know active users or active clients is a meaningless term from a router standpoint and wouldn't mind having more appropriate terms to use. Summary: I need a way to test a routers ability in handling traffic from a large number of clients. My current strategy is to purchase a router, deploy it, and see how it fails in the live environment.

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  • Outlook Shared Mailbox automatic calendar export

    - by Arthur
    I am aware that the shared mailbox feature is an exclusive microsoft feature in exchange and does not work on any non microsoft products. I am trying to create a workaround so am looking for a way to automatically export a calendar by schedule or any other means. Does anybody know any good Outlook plugins that would do something like that? it must export either in csv or iCal or some kind of other readable format.

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  • Using numerous IP addresses in a browser in linux

    - by BHare
    I own a dedicated server than runs Debian Linux. I have 64 IP addresses configured on the machine. I am looking to open a page (just has to access it with lynx or anything to read) with one of the non-default 64 IP addresses, besides just the default one. How can I do this?

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  • Xen VPS web front end manager

    - by JavaRocky
    Do any Xen VPS web front end managers exist for provisioning and managing virtual private servers? I am comfortable on the command line creating new virtual machines, however it would be nice if i could use a nice web front end.

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  • Does vertical position affect hard drive?

    - by yoosiba
    Hey. Recently I noticed that for many small PC cases hard drives are installed in vertical position while in midi tower and all bigger they are in horizontal position. What impact on hdd (non SSD, just plain hdd with all mechanical parts inside) has vertical position/ Does it decrease life of hdd? Is it more prone to data errors?

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  • Easy to use web-based reporting tool

    - by SuperFurryToad
    I'm looking for recommendations for an easy to use reporting/business intelligence tool that can interface with an sql server or access database. It can be web-based or a desktop tool. Ideally it would be freeware or low cost, and easy to use for users who are not that technically savvy (below the level of someone who can generate reports and complicated queries in Access). Any tools I've seen so far (such as Crystal Reports) are either too expensive or too complicated to use for non-power users.

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  • Why is there a separate "unicorn_rails" for Rails apps?

    - by Ben Lee
    According to the Unicorn docs, there are different binaries for Rails apps and other Rack apps: non-Rails Rack applications In APP_ROOT, run: unicorn for Rails applications (should work for all 1.2 or later versions) In RAILS_ROOT, run: unicorn_rails They seem to also take the same command-line parameters. But Rails is built on top of rack, so I don't understand why this dichotomy is required. Is there any reason you can't just use unicorn for Rails apps?

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  • Which service should I make mine dependant on ?

    - by Retrocoder
    I want to add a dependency to my service so that it only tries to start after most of the Windows services have started. Can anyone recommend such a service that is unlikely to have been disabled for security reasons on corporate sites. As my service needs the networking services up and running I want to make sure mine starts after these. This service may also be deployed in non-corporate environments so I’m looking for a suitable service that is unlikely to have been disabled by the end user.

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  • Recovering files using Recuva

    - by Nev Meek
    I'm currently using Recuva to recover some files from an external NTFS disk. It finds the files I'm interested in during it's analysis phase (when tools like test-disk fail to find them at all) and reports them as "Not-deleted" and a big green marker to signify 100% chance of recovery. However when it tries to recover the files I get a "the system could not find the file specified" message. Is there any easy way to recover non-deleted files off of a disc that I can no longer simply access through explorer?

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  • How to serve 410 from Apache rather than a 404

    - by DanSingerman
    On our site, we tend to remove pages a lot where the content has expired, and we want to return http status 410 rather than 404 for requests to pages (physical files) that don't exist on our server (the entire site is made up of static files). We have tried from http://diveintomark.org/archives/2003/03/27/http_error_410_gone but that just breaks our entire site, serving a 410 for every request. We are using Apache 2.2.3

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  • Is there a middle ground in monthly server costs?

    - by user41655
    Right now I'm paying a monthly fee of 12.95 for a server and I'm definitely getting what I pay for! (no customer support, outages, slowdowns, glitches, etc) I know that the good companies (Rackspace) charge much more. (Hundreds a month) I'm wondering if there is a middle ground somewhere that might be as good as Rackspace but is still better than what I have. 50 a month maybe? If it does exist will the extra $40 a month be worth it?

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  • Podcast software with Cue Sheet support

    - by Shevek
    I am looking for an all-in-one solution which can do at least the first 2, preferably all 3 of the following steps from my current manual process: Podcast download (currently using iTunes) Search for and download matching Cue Sheet from web (currently using CueNation) Use the CUE file to split the MP3 (currently using Medieval CUE Splitter) Does such a thing exist? Or do I have to break out my C# skills?

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  • Select part of a text that exists already in an above cell

    - by pragadheesh
    How do I get Excel to partially auto-complete a word using another that already exist in the same worksheet? Let's say I have the word "Microsoft" in a cell and in the cell below I want to type the word "Microhard". When I start typing Microhard, the word Microsoft appears shaded in black. How can I select the "Micro" part alone from Microsoft and continue to fill out the rest with "hard" without it trying to fill out as Microsoft?

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  • Detect fails in setup script

    - by Lai Yu-Hsuan
    I wrote a setup script to install my prefered programs and settings after I got a new server. apt-get install git git clone http://[email protected] .vim ln -s .vimrc .vim/vimrc ... But if something wrong happens during setup, how can I interrupt the setup script, and log the error(s)? For example, if github server is down, it's obviously useless to create a symbolic link to non-existed vimrc. (or you have a better approach to initialize a server?)

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  • Apache / Postfix / Cyrus question

    - by Lerikun
    Apache: I have multiple domains on one hosting. I have a web-management software listening to port 3000 and one phpmyadmin. Can I restrict access to a certain domain? I mean that example.com:3000 will work and notexample.com:3000 not? (same for phpmyadmin) UPD: I have 3 IP's pointing to that host. Postfix/Cyrus: What is the right config to reject emails to mailboxes which do not even exist? (LDAP) Thanks

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