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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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  • .NET framework 4 backwards compatibility.

    - by Dark.Lama
    Hi! I had installed .NET framework 4 in my system. It says that .NET framework 4 is backwards compatible with all previous versions. But an app installer still asks me to install .NET.F.W. 3.5 SP1. What should I do to make the installer aware of .NET 4's presence? Is it necessary to install .NET. 3.5 SP1 too? (It is a big setup ~250 MB)

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  • JavaApplicationStub Compatibility with all java versions

    - by neelamsharma
    Hi, I am running a Java application on Mac Leopard & on Mac Mini. My Mac Mini upgraded, it is using Java Version 1.6.0_17 and Mac Leopard have version 1.5.0_13. To run that application on Mac Mini I have to copy JavaApplicationStub from path -"/System/Library/Frameworks/JavaVM.framework/Resources/MacOS/JavaApplicationStub" to my application "Content/Resources/Java". But this application successfully run on Mac Leopard. If I do not copy stub at Mac Mini then I am unable to launch application using app by double click, it shows icon for few second then disappears, so in that case I have to run application with its jar. I want that without copying explicitly JavaApplicationStub, how can I run app with all versions of java. If this possible then what changes I have to made? The info.plist file contain JVMVersion is 1.4+. Thanks!

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  • vmWare virtual image compatibility

    - by luca
    If I create a vmware virtual image on my mac (with vmware Fusion 2) it creates a file line "Ubuntu.vmwarevm" My question (which I couldn't get answered by vmware Support..) is: Will this file be compatible with a ESXi 4.0 server? In general, virtual machine for vmware are all the same format? thanks

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  • Postfix + Cpanel compatibility

    - by Mishari
    I am working on a VPS that has cPanel installed and I wanted to install Postfix on it. However I find that cPanel seems to be quite tightly integrated with Exim. I have done a google search but have only found vague statements that says "cPanel does not support postfix" but I haven't found any authoritative sources in this matter. So my question is, what happens if I disable exim entirely and install postfix instead? Will it break cPanel? Will everything run as normal? Update with more questions: Can I leave Exim for cPanel's internal use and use postfix for everything else? If so, what will happen to dovecot?

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  • Compatibility of Fedora install on a Hybrid drive

    - by kjh
    I recently bought un ultrabook with a 500gb/32gb sdd hdd hybrid drive, and I'm having trouble replacing windows on it with fedora seventeen. it errors out saying there was an unhandled exception. Is linux compatible with hybrid drives? or can the operating system on a hybrid drive not be replaced? Edit: here are the steps I select special storage devices because it ignores my hard drives otherwise at this point i get the message: "Disk contains bios raid meta data, disk sda will be ignored" I can pick a hostname, select my timezone and set a password at the install type screen, no matter what I select (use all free space, replace linux systems, create custom partition etc..) once I click next, it says "an unhandled exception" has occured. and I can no longer proceed with installation. Here is the error message: anaconda 17.29 exception report Traceback (most recent call first); File "/usr/lib64/python2.7/size-packages/pyanaconda/bootloader.py"; line 183 self.stage1_drive=self_drives[0] File "/usr/lib64/python2.7/site-packages/pyanaconda/rw/cleardisks_gui.ph"; line... and tons of more lines like that

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  • IPV6 - using tunnel broker / dns to provide ipv4 compatibility

    - by Bgnt44
    I've a tunnel broker from he.net associate with a IPV6 /64 subnet As a newby to ipv6, i've just discovered that its not reliable to only set a subdomain to a AAAA entry : because most of ISP will not be able to reach it Considering i got 3 vm, each with ipv6 ip , i would like to know if there any way to set up my dns to handle that ? I only got one IPV4 which is binded on the firewall maybe the tunnel can resolve hostname/ipv4 to ipv6 ? Thank you

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  • How to use iptables to forward all data from an IP to a Virtual Machine

    - by jro
    OK, in an attempt to get some response, a TL;DR version. I know that the following command: iptables -A PREROUTING -t nat -i eth0 --dport 80 --source 1.1.1.1 -j REDIRECT --to-port 8080 ... will redirect all traffic from port 80 to port 8080. The problem is that I have to do this for every port that is to be redirected. To be future-proof, I want all ports for an IP to be redirected to a different (internal) IP, so that if one might decide to enable SSH, they can directly connect without worrying about iptables. What is needed to reliable forward all traffic from an external IP, to an internal IP, and vice versa? Extended version I've scoured the internet for this, but I never got a solid answer. What I have is one physical server (HOST), with several virtual machines (VM) that need traffic redirected to them. Just getting it to work with a single machine is enough for now. The VM's run under VirtualBox, and are set to use a host-only adapter (vboxnet0). Everything seems to work, but it is greatly lagging. Both the host (CentOS 5.6) and the guest (Ubuntu 10.04) machine are running Linux. What I did was the following: Configure the VM to have a static IP in the network of the vboxnet0 adapter. Add an IP alias to the host, registering to the dedicated (outside) IP. Setup iptables to allow traffic to come through (via sysctl). Configure iptables to DNAT and SNAT data from a given IP address to the internal address. iptables commands: sudo iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT sudo iptables -A POSTROUTING -t nat -j MASQUERADE iptables -t nat -I PREROUTING -d $OUT_IP -I eth0 -j DNAT --to-destination $IN_IP iptables -t nat -I POSTROUTING -s $IN_IP -o eth0 -j SNAT --to-source $OUT_IP Now the site works, but is really, really slow. I'm hoping I missed something simple, but I'm out of ideas for now. Some background info: before this, the site was working with basic port forwarding. E.g. port 80 was mapped to port 8080 using iptables. In VirtualBox (having the network adapter configured as NAT), a port forwarding the other way around made things work beautifully. The problem was twofold: first, multiple ports needed to be forwarded (for admin interfaces, https, ssh, etc). Second, it only allowed one IP address to use port 80. To resolve things, multiple external IP addresses are used for different (sub)domains. Likewise, the "VirtualBox" network will contain the virtual machines: DNS Ext. IP Adapter VM "VirtalBox" IP ------------------------------------------------------------------ a.example.com 1.1.1.1 eth0:1 vm_guest_1 192.168.56.1 b.example.com 2.2.2.2 eth0:2 vm_guest_2 192.168.56.2 c.example.com 3.3.3.3 eth0:3 vm_guest_3 192.168.56.3 And so on. Put simply, the goal is to channel all traffic from a.example.com to vm_guest_1 (of put differently, from 1.1.1.1 to 192.168.56.1). And achieve this with an acceptable speed :).

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  • Snowfall application with Windows 7 compatibility

    - by Shiki
    Okay, this may seem to be a strange question. I'm searching for a 'snowfall application'. Back then we had a lot of like this.. in the old ages, when XP came out, so on. Nowadays, I can't find a single working one. It's not like I suddenly want something like this, but a girl asked me whethers its possible or not. IMHO its possible but... Please help me out. =) (Obviously, free software shareware.)

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  • Forward local port or socket file to remote socket file

    - by Ninefingers
    Hi All, Quick question - I run two linux boxes, one my own desktop and the other my VPS. For security reasons on the VPS end I opted for socket connections to MySQL (/var/run/mysqld/mysql.sock). I know I can tunnel like this: ssh -L 3307:127.0.0.1:3306 [email protected] if I set up the remote sql server to listen on some port, but what I want to know is can I do something like: ssh -L /path/to/myremotesqlserver.sock:/var/run/mysqld/mysql.sock thereby tunnelling two sockets, as opposed to two ports? A perfectly acceptable solution would also be to forward a local port to the remote socket file, but where possible I'm trying not to have tcp servers running on the remote box. (and yes, I know tcp would be easier). Thanks all, Nf.

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  • Windows Load-Balancing, Forward-Proxying Software

    - by LandonC
    Does anyone know of any Windows software that will do forward-proxying load-balancing, like HAProxy does? There are tons of reverse-proxy solutions, but I can't find any that do what HAProxy does, that is, allows you to load-balance a group of forwarding-proxies. I have a proxy farm (don't ask) that I need to round-robin balance. HAProxy will do it, but is very unstable on Windows. Thoughts? I'd really appreciate it. And yes, this is an actual, production environment question.

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  • forward ssh ports on EC2

    - by Will Glass
    I have an SSH server on a private subnet within an EC2 vpc listening for ssh on port 9022 I also have a nat instance (standard Amazon EC2 nat) on a public instance. I would like to forward incoming SSH connections (port 9022) to my nat to the internal server (port 9022). I tried this, but it didn't work: sudo iptables -t nat -I PREROUTING -p tcp -i eth0 --dport 9022 -j DNAT --to-destination 10.0.2.11:9022 I verified that 10.0.2.11 is listening on port 9022. (I can telnet). I verified my security group allows incoming port 9022. I verified that /proc/sys/net/ipv4/ip_forward is 1. What am I missing? Edit: Turns out this was correct after all. I had a mistake in my security group.

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  • Qmail does not forward mail to a specific domain

    - by jahufar
    Hi I have a dedicated hosting account with GoDaddy.com. I've pointed my domain's email to work with Google apps. The server has qmail running and it forwards email to all domains just fine except for MY domain (mydomain.com) - it says 550 User xxx not found in mydomain.com I believe it thinks I've hosted email on the server itself (not gmail) and it's trying to validate if [email protected] exists on my server (which is not the case since it's all handled by google apps). How do I make it forward mail to all domains? Thank you :) EDIT: I would only need it forwarding emails if the connection originates from 127.0.0.1 - which I believe is the default way it's configured. So to clarify: I just need a purely forwarded configuration so my PHP scripts have the ability to send email.

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  • cPanel default email address and BCC forward

    - by trante
    In my cPanel I redirect all unknown emails to my gmail address of [email protected]. I set it from default email address option of cPanel of example.com. I wrote a filter in gmail. When I receive email thait is sent to example.com I move it to folder X. But when I receive an email that is sent to example.com as BCC, I don't see my email address in headers, so filter doesn't work. Email comes to gmail inbox, which I don't like. So I need to forward BCC type emails to [email protected]. Or add my email address before forwarding to gmail.

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  • iptables forward rule not working in openwrt

    - by Udit Gupta
    I am trying to apply some iptables forwarding rules in openwrt. Here is my scenario - My server has two cards ath0 and br-lan. br-lan is connected to internet and ath0 to private network. The other m/c in n/w also has ath0 that connects with this server's ath0 and they are able to ping each other. Now, I want other m/c in network to use internet using br-lan of server so I thought of using iptables forwarding rule- Here is what I tried - Server : $ ping 1.1.1.6 // <ath0-ip of client> works fine $ iptables -A FORWARD -i ath0 -o br-lan -j ACCEPT $ /etc/init.d/firewall restart Client : $ ping 1.1.1.5 // <ath0-ip of server> works fine $ ping 132.245.244.60 // <br-lan ip of server> (not working) I am new to iptables stuff and openwrt. What I am doing wrong here ?? Any other help if anyone could suggest for my scenario Edit- m/c - machine n/w - network

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  • Forward Windows Events Logs to Rsyslog

    - by SamCulley
    Thanks for taking time to read this post. Basically I would like to forward Windows Events Logs from all my desktop clients to a linux box with rsyslog on. Rsyslog provide a Windows agent to do just that but its 40 euros per license and when you have x amount of machines that cost adds up. I was wondering if there is a FOSS alternative available I have tried searching the Google but haven't managed to find anything. Hopefully someone might already faced this same problem and are using an alternative that they could recommend. Again thanks for reading, Kind Regards Sam

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  • mod_proxy failing as forward proxy in simple configuration

    - by Stabledog
    (On Mac OS X 10.6, Apache 2.2.11) Following the oft-repeated googled advice, I've set up mod_proxy on my Mac to act as a forward proxy for http requests. My httpd.conf contains this: <IfModule mod_proxy> ProxyRequests On ProxyVia On <Proxy *> Allow from all </Proxy> (Yes, I realize that's not ideal, but I'm behind a firewall trying to figure out why the thing doesn't work at all) So, when I point my browser's proxy settings to the local server (ip_address:80), here's what happens: I browse to http://www.cnn.com I see via sniffer that this is sent to Apache on the Mac Apache responds with its default home page ("It works!" is all this page says) So... Apache is not doing as expected -- it is not forwarding my browser's request out onto the Internet to cnn. Nothing in the logfile indicates an error or problem, and Apache returns a 200 header to the browser. Clearly there is some very basic configuration step I'm not understanding... but what?

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  • How to forward UDP and TCP traffic from one IP to another

    - by Rishabh Agnihotri
    Well i have a server with two LAN Card Installed.I have a server in U.S and one in India.I have created a GRE tunnel to route all traffic from U.S Server to my Indian Server.My Traffic has UDP,TCP,HTTP,etc Traffic.Now i have two LAN Card on my Indian Server.Well i have configured two IPs on the system for some of my needs on the system.One is a /30 and another is a /24.Well now i want the /30 IP to talk to my /24 IP.Lets take a e.g the IPs are 180.151.130.34 - /30 and 103.243.19.254 -/24 I want to forward all the TCP,UDP,HTTP,etc like traffic coming to 180.151.130.34 to 103.243.19.254.In the sense i want to make them talk to each other in a way if a TCP/UDP Packet comes to 180.151.130.34 it should be forwarded to 103.243.19.254 and then that packet is sent back by 103.243.19.254 to 180.151.130.34.I am not able to configure this part.Can anyone tell me step by step how to do so? Well i forgot to specify i am using Windows Server 2008. Any help would be greatly appreciated.Thanks in advance.

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  • Forward Hostname via my router to another PC for debugging

    - by Markive
    Hi, My web service runs on for example: http://mydomain.com/mywebservice.asmx. This works great, but I have a PDA application which I want to debug it synchronising through this web service. Currently the only way I can do this is to debug the webservice running on the actual server which is far from ideal. What I would like to do is for any device connecting on my wireless network, if it requests mywebservice.asmx for this to forward the request to my development PC and for IIS to then handle the request and allow me to debug in Visual Studio. So device on the network that requests the hostname: mywebservice.asmx will his this PC.. I am at a loss to set this up on my router (Zoom ADSL X6), this is massively out of my scope but any help would be much appreciated

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  • Corrupted attachments in Thunderbird forward filter

    - by Guandalino
    I created a filter in Thunderbird 14 on client A that, when a certain rule on incoming mail is satisfied, the same mail is forwarded to client B and C. Matching mails received from A are always forwarded to B and C, and that's what I want. Though, when the mail on A has an attachment, it is also forwarded by B and C but the file they receive is corrupted. In my case the incoming file on A is a Word file of about 10kb in size; clients B and C receive a Word file of 27 bytes. I think this could happen because the forward starts from A when the attachment is not yet completely downloaded. I'm not sure this is the cause, though. And I wouldn't have any idea for a fix. Any idea about how to investigate or solve the issue?

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  • How to forward connection from one interface to another under linux

    - by Daniel
    Hi, I have linux box which has two network interface, eth0, eth1. from eth1 I can access an internal website, say under port 8080. from outside the box, I can't access that network. my question is, is there a way I set up something so from outside the box, there appears to be a web server running in port 8080 and when I connect to it, it automatically forwards to eht1 the internal site? I tried to enable ip forward and add a static route, but it doesn't work. thanks.

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  • switch duplicates packets and forward in two route

    - by sami
    there is a network including a router, two hosts and a switch which connects hosts to router. i have a virtual machine on my system. the network adapter is set to act as bridge. so the virtual machine and real OS are my 2 hosts on different LAN. they use one network card and are connected to a switch. when each of host send a packet to the other one, the switch duplicate the packet and forward it to both router and the other host. how can I solve the duplicate packet problem? Thanks.

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  • Setting up apache rewrite rule to only forward if in a directory

    - by wooowoopo
    Hi, I currently have a site setup with the following in httpd.conf: <VirtualHost x.x.x.x:80> ServerName testsite ExpiresActive On ExpiresByType image/gif A2592000 ExpiresByType image/png A2592000 ExpiresByType image/jpg A2592000 ExpiresByType image/jpeg A2592000 ExpiresByType text/css A2592000 ExpiresByType application/x-javascript A1 ExpiresByType text/javascript A1 AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css application/x-javascript text/javascript DocumentRoot /usr/local/www/apache22/data/thesite/trunk RewriteEngine On RewriteRule !\.(htc|js|tiff|gif|css|jpg|png|swf|ico|jar|html|doc|pdf|htm|xml)$ %{DOCUMENT_ROOT}/../platform.php [L] </VirtualHost> Where x.x.x.x is my IP. At the moment it forwards anything which is not in the set (htc|js|tiff|gif|css|jpg|png|swf|ico|jar|html|doc|pdf|htm|xml) to platform.php How htp://x.x.x.x/phpmyadmin to also forward. Would it be possible to only perform this rewrite conidtion if I am in a subdirectory. Eg. http://x.x.x.x/projectone So htp://x.x.x.x/projectone/login would direct to the platform.php Thanks

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