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  • .NET using block and return; keyword

    - by Emre
    When I say this using (Entities db = new Entities()) { return db.TableName.AsQueryable().ToList(); } Do I by-pass the functionality of using block since I return something, and the method exits before exiting the using block, so I think the using block will not serve to its purpose and dispose the resource. Is this correct?

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  • Passing local variables to Erlydtl block

    - by Justin
    Hi, I've got a block of erlydtl code which I use repeatedly and would like to abstract to some kind of block / partial template. The issue is that I need to pass the block a local variable. This is possible with Rails partial templates; it looks like it's possible with Django's blocks [albeit with some kind of Python hackery]; I'm wondering if it's possible with Erlydtl [Erlang implementation of Django templates] Ideas ? Thanks you.

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  • Block IP Address including ICMP using UFW

    - by dr jimbob
    I prefer ufw to iptables for configuring my software firewall. After reading about this vulnerability also on askubuntu, I decided to block the fixed IP of the control server: 212.7.208.65. I don't think I'm vulnerable to this particular worm (and understand the IP could easily change), but wanted to answer this particular comment about how you would configure a firewall to block it. I planned on using: # sudo ufw deny to 212.7.208.65 # sudo ufw deny from 212.7.208.65 However as a test that the rules were working, I tried pinging after I setup the rules and saw that my default ufw settings let ICMP through even from an IP address set to REJECT or DENY. # ping 212.7.208.65 PING 212.7.208.65 (212.7.208.65) 56(84) bytes of data. 64 bytes from 212.7.208.65: icmp_seq=1 ttl=52 time=79.6 ms ^C --- 212.7.208.65 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 79.630/79.630/79.630/0.000 ms Now, I'm worried that my ICMP settings are too generous (conceivably this or a future worm could setup an ICMP tunnel to bypass my firewall rules). I believe this is the relevant part of my iptables rules is given below (and even though grep doesn't show it; the rules are associated with the chains shown): # sudo iptables -L -n | grep -E '(INPUT|user-input|before-input|icmp |212.7.208.65)' Chain INPUT (policy DROP) ufw-before-input all -- 0.0.0.0/0 0.0.0.0/0 Chain ufw-before-input (1 references) ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 3 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 4 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 11 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 12 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 8 ufw-user-input all -- 0.0.0.0/0 0.0.0.0/0 Chain ufw-user-input (1 references) DROP all -- 0.0.0.0/0 212.7.208.65 DROP all -- 212.7.208.65 0.0.0.0/0 How should I go about making it so ufw blocks ICMP when I specifically attempt to block an IP address? My /etc/ufw/before.rules has in part: # ok icmp codes -A ufw-before-input -p icmp --icmp-type destination-unreachable -j ACCEPT -A ufw-before-input -p icmp --icmp-type source-quench -j ACCEPT -A ufw-before-input -p icmp --icmp-type time-exceeded -j ACCEPT -A ufw-before-input -p icmp --icmp-type parameter-problem -j ACCEPT -A ufw-before-input -p icmp --icmp-type echo-request -j ACCEPT I'm tried changing ACCEPT above to ufw-user-input: # ok icmp codes -A ufw-before-input -p icmp --icmp-type destination-unreachable -j ufw-user-input -A ufw-before-input -p icmp --icmp-type source-quench -j ufw-user-input -A ufw-before-input -p icmp --icmp-type time-exceeded -j ufw-user-input -A ufw-before-input -p icmp --icmp-type parameter-problem -j ufw-user-input -A ufw-before-input -p icmp --icmp-type echo-request -j ufw-user-input But ufw wouldn't restart after that. I'm not sure why (still troubleshooting) and also not sure if this is sensible? Will there be any negative effects (besides forcing the software firewall to force ICMP through a few more rules)?

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  • How to block access to websites on a linux box [closed]

    - by user364952
    I'm just curious how many ways people can come up with to block access to a website. I simply intended to block (my own) access to news.ycombinator.com to stop my productivity drain. The first two methods I thought of were editing the hosts file to resolve news.ycombinator.com to 0.0.0.0 or adding a rule to iptables. iptables -A OUTPUT -d news.ycombinator.com -j REJECT Disclaimer: I do realise that the above two methods are easily by-passable. Doesn't help this is my own machine. What other ways does the internet know?

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  • Firewall software that can block access to certain applications on certain internet connections

    - by webmasters
    I have two internet connections, a LAN and a 3G modem on a Windows 7 machine. The LAN is connected to a Edimax router which is conneted to the ISP (with their own modem). Now, the Edimax router is set to auto assign IP adresses in the range: 168.192.2.100 and 192.168.2.200 I wanted to block internet explorer to access the LAN. I entered my AVG firewall, selected iexplorer and added a "block" rule which blocked all ports, TCP and UDP protocols for the above IP range. The problem is it did not work, not matter what rules I have tried. Can you recommend a firewall that can easily accomplish this? Ty

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  • Emma - Block Coverage vs Line Coverage

    - by MasterGaurav
    I have a strange scenario... while doing a EMMA coverage for UT, I get the total block coverage size more than line coverage size. For block coverage, the total size is some 50,000 while the line coverage is out of 18,000. I get (block-coverage-value) / 50,000 and (line-coverage-value) / 18,000 in the report. Is it possible? How can the number of blocks be more than the number of lines in code? btw, you can assume that I know what Block Coverage is: http://emma.sourceforge.net/faq.html#q.blockcoverage

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  • Block spam by using geoip filter?

    - by faultyserver
    We are looking for a way to be able to block spam based on geographic location by filtering using geoip. context: we rarely have any email correspondence outside of the USA, so we would like to block all incoming email outside the US except for maybe one or two countries. After a little Googling I have found a couple of solutions that may work (or not), but I would like to know what other sysadmins are currently doing or what they would recommend as a solution. Here is what I have found so far: Using PowerDNS and its GeoIP backend it is possible to use geoip for filtering. Normally this backend is used to help distribute load as a kind of load balancing but I dont see why it couldnt be used to kill spam as well? Possibly use the Maxmind lite country database and some scripting to do a similar job. Ideally what I am looking for is a solution that would handle decent load and scale well too...aren't we all! ;) Thanks in advance for your help! :-)

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  • Lexical and dynamic scoping in Mathematica: Local variables with Module, With, and Block

    - by dreeves
    The following code returns 14 as you'd expect: Block[{expr}, expr = 2 z; f[z_] = expr; f[7]] But if you change that Block to a Module then it returns 2*z. It seems to not matter what other variables besides expr you localize. I thought I understood Module, Block, and With in Mathematica but I can't explain the difference in behavior between Module and Block in this example. Related resources: Tutorial on Modularity and the Naming of Things from the Mathematica documentation Excerpt from a book by Paul R. Wellin, Richard J. Gaylord, and Samuel N. Kamin Explanation from Dave Withoff on the Mathematica newsgroup

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  • Enabling AES 256 GCM on Windows Server 2012 R2

    - by Feanaro
    I'd like to enable the use of the AES 256 GCM encryption instead of the AES 256 CBC. We already have ECC certificates based on ECDSA so that pre-requisite has been fullfilled. The certificate has a SHA-256 signature and uses a 256-bit ECC keyset. The ciphersuite I'd like to use: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384_P384 This is our ciphersuite order: TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384_P384, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384_P521, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384_P384, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384_P521, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA_P256, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA_P256, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256 Still when I check the website it says we use TLS 1.2 and ECDHE_ECDSA for key exchange AES_256_CBC encryption and SHA1 for message digest. I suspect it uses this suite for some reason: TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA_P256 When I remove that ciphersuite the site has a protocol mismatch and won't load the https anymore. Does anyone know how to enable the ciphersuite? Did I forget to set something in the registry or do I need to do something else to enable that specific suite. Thanks in advance!

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  • Boost causes an invalid block while overloading new/delete operators

    - by user555746
    Hi, I have a problem which appears to a be an invalid memory block that happens during a Boost call to Boost:runtime:cla::parser::~parser. When that global delete is called on that object, C++ asserts on the memory block as an invalid: dbgdel.cpp(52): /* verify block type */ _ASSERTE(_BLOCK_TYPE_IS_VALID(pHead->nBlockUse)); An investigation I did revealed that the problem happened because of a global overloading of the new/delete operators. Those overloadings are placed in a separate DLL. I discovered that the problem happens only when that DLL is compiled in RELEASE while the main application is compiled in DEBUG. So I thought that the Release/Debug build flavors might have created a problem like this in Boost/CRT when overloading new/delete operators. So I then tried to explicitly call to _malloc_dbg and _free_dbg withing the overloading functions even in release mode, but it didn't solve the invalid heap block problem. Any idea what the root cause of the problem is? is that situation solvable? I should stress that the problem began only when I started to use Boost. Before that CRT never complained about any invalid memory block. So could it be an internal Boost bug? Thanks!

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  • Query size of block device file in Python

    - by ??O?????
    Hello. I have a Python script that reads a file (typically from optical media) marking the unreadable sectors, to allow a re-attempt to read said unreadable sectors on a different optical reader. I discovered that my script does not work with block devices (e.g. /dev/sr0), in order to create a copy of the contained ISO9660/UDF filesystem, because os.stat().st_size is zero. The algorithm currently needs to know the filesize in advance; I can change that, but the issue (of knowing the block device size) remains, and it's not answered here, so I open this question. I am aware of the following two related SO questions: Determine the size of a block device (/proc/partitions, ioctl through ctypes) how to check file size in python? (about non-special files) Therefore, I'm asking: in Python, how can I get the file size of a block device file?

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  • IP assignment in a /28 block

    - by mks
    Need help on setting up firewall router. My config is as below: Public static network ID: x.x.x.48/28 gateway: x.x.x.49 available IP for the hosts: x.x.x.52 to 62 gw_eth0 <-- fw_eth0 - fw_eth1 <-- dmz_switch Four servers are connected on dmz_switch (say s1, s2, s3, s4) all have to use public static IP address from the above block. Any recommendation on IP assignment and route setup? Do I need to subnet the above block further or simply use /32 netmask and point-to-point static routes in the above setup?

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  • RijndaelManaged Padding when data matches block size

    - by trampster
    If I use PKCS7 padding in RijndaelManaged with 16 bytes of data then I get 32 bytes of data output. It appears that for PKCS7 when the data size matches the block size it adds a whole extra block of data. If I use Zeros padding for 16 bytes of data I get out 16 bytes of data. So for Zeros padding if the data matches the block size then it doesn't pad. I have searched through the documentation and it says nothing about this difference in padding behavior. Can someone please point me to some kind of documentation which specifies what the padding behavior should be for the different padding modes when the data size matches the block size.

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  • Magento Store - Remove Block using Update XML

    - by a1anm
    I am using this code in my template file to display a static block in my left sidebar: <?= $this->getLayout()->createBlock('cms/block')->setBlockId('leftSB1')->toHtml() ?> I would like to exclude the block from one of my CMS pages. How do I do this? I think it requires adding code to the 'Layout Update XML' section but I'm not sure what exactly.

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  • Error mounting samba share, cannot mount block device xxxx read-only

    - by Jeff Ward
    After installing Ubuntu 12.04, I'm trying to mount a samba share from Windows under Linux, using a scripted command that's always worked, and the server hasn't changed. The error is as follows: $ mount -t cifs //<host>/<share> /media/<share> -o username=<user>,password=<pass> mount: block device //<host>/<share> is write-protected, mounting read-only mount: cannot mount block device //<host>/<share> read-only $ I've read a lot of discussions about permissions, but unfortunately, that wasn't the issue. I'm submitting my own answer below for reference, hope this helps someone else.

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  • Block by file type, but just file extension using MDaemon

    - by Arjun Rajagopalan
    I've had users sending copyrighted files (songs, videos) to each other over email. I blocked the file extensions .mp3 etc. What some users have done is to rename files to .doc etc. I cant block .doc etc filetypes because they are needed for day-to-day work. I'm using MDaemon 12 mailserver, Does anyone know how to make it block these attachments? I've been working on some content scanning for filetype code, but was wondering if there is a already made solution?

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  • Error: Unable to access jarfile Click-The-Block.jar

    - by AqueousSnake
    I have made a simple game that I want to convert into a runnable jar so I can show others and launch it without Eclipse. In Eclipse I: Right clicked on Project Export Java Exectuable Jar File Launch Configuration: CTB (1) - Click The Block It made a jar with a MANIFEST.MF containing: Manifest-Version: 1.0 Class-Path: . Main-Class: uk.co.robertmerriman.ctb.main.CTB This was all extracted to my desktop in Click-The-Block.jar When I double click, nothing happens. When I type "java -jar Click-The-Block.jar" into CMD, I get the following error: Error: Unable to access jarfile Click-The-Block.jar.

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  • IIS 6.0 mitigating BEAST

    - by D3l_Gato
    Recently, my PCI assessor informed me that my servers are vulnerable to BEAST and failed me. I did my homework and I want to change our webservers to prefer RC4 ciphers over CBC. I followed every guide I could find... I changed my reg keys for my weaker than 128bit encryption to Enabled = 0. completely removed the reg keys for the weaker encryptions. I downloaded IISCrypto and unchecked everything but RC4 128 ciphers and triple DES 168. My webserver still prefers AES-256SHA. Is there a trick in IIS 6.0 to get your webservers to prefer RC4 ciphers that I am not figuring out? It seems like in IIS 7 they made this very easy to fix but that doesn't help me now!

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  • C++ MACRO that will execute a block of code and a certain command after that block.

    - by Poni
    void main() { int xyz = 123; // original value { // code block starts xyz++; if(xyz < 1000) xyz = 1; } // code block ends int original_value = xyz; // should be 123 } void main() { int xyz = 123; // original value MACRO_NAME(xyz = 123) // the macro takes the code code that should be executed at the end of the block. { // code block starts xyz++; if(xyz < 1000) xyz = 1; } // code block ends << how to make the macro execute the "xyz = 123" statement? int original_value = xyz; // should be 123 } Only the first main() works. I think the comments explain the issue. It doesn't need to be a macro but to me it just sounds like a classical "macro-needed" case. By the way, there's the BOOST_FOREACH macro/library and I think it does the exact same thing I'm trying to achieve but it's too complex for me to find the essence of what I need. From its introductory manual page, an example: #include <string> #include <iostream> #include <boost/foreach.hpp> int main() { std::string hello( "Hello, world!" ); BOOST_FOREACH( char ch, hello ) { std::cout << ch; } return 0; }

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  • block z-positioning without z-index

    - by Peter
    Please, have a look at: http://twitter.github.com/bootstrap/base-css.html There are many examples like this one: if you look closer to the block borders, you can see that the gray block is under the white one. Using the browser's developer tools you can see that both boxes have an inherited z-index: auto; I can't reproduce this effect on my website (without using z-index). So, my question is: Why is the gray block under the white one?

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  • RSA encrypted data block size

    - by calccrypto
    how do you store an rsa encrypted data block? the output might be significantly greater than the original input data block size, and i dont think people waste memory by padding bucket loads of 0s in front of each data block. besides, how would they be removed? or is each block stored on new lines within the file? if that is the case, how would you tell the difference between legitimate new line and a '\n' char written into the file? what am i missing? im writing the "write to file" part in python, so maybe its one of the differences between: open(file,'w') open(file,'w+b') open(file,'wb') that i dont know. or is it something else?

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  • How to block access to files in the current directory with .htaccess

    - by kfir
    I have a few private files in a public folder and I want to block access to them. For example lets say I have the following files tree: DictA FileA FileA FileB FileC I want to block access to FileB and FileA in the current directory and allow access to the FileA in the DictA directory. The first thing that came to mind was to use the FilesMatch directive as follows: <FilesMatch "^(?:FileA)|(?:FileB)$"> Deny from all </FilesMatch> The problem here is that FileA inside DictA will also be blocked, which is not what I wanted. I could override that by adding another .htaccess file to DictA but I would like to know if there is a solution which wont involve that. P.S: I can't move the private files to a separate folder.

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