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  • EC2 custom topology

    - by Methos
    Is there any way to create a desired topology of EC2 instances? For example, can I create a 3 node topology of nodes A, B, C where C gets the public IP address and B and A are connected to it. Something like: Internet <-- C <-- B <-- A B and A only get private IP addresses and there is no way for the traffic to reach A before hitting B and C. This means I can install whatever I want to install on C and B to filter, cache etc. I'm going through EC2 documentation but so far I have not seen anything that talks about it. I will really appreciate if anyone knows how to do this on EC2

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  • How to check if cell contains a value of another cell

    - by Antonio Oliveira
    Here is the scenario: On column A each cell has random text within it (names, address, account numbers, etc). Column A extends down to over 40 thousand rows. On column B I have a list of (account) numbers. Column B extends down to about 5 thousand rows. I need to filter column A to show only the rows that contain the account numbers that are part of column B. Neither column A nor B are in any specific order. I think he above scenario speaks for itself, but I can provide a quick example if needed (don't want to over complicate it).

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  • controlling the bandwidth using tc

    - by Supratik
    Hi I have two NIC etho is connected to the internet and eth1 is connected to the LAN. I want to restrict the download limit using iptables and linux tc. So I wrote a test script to verify if it is working. My iptables configuration is as below. iptables -t mangle -N INBOUND iptables -t mangle -I PREROUTING -i eth0 -j INBOUND iptables -t mangle -A INBOUND -j MARK --set-mark 60 My ingress configuration is as below. tc qdisc add dev eth0 handle 1: ingress tc filter add dev eth0 parent 1: protocol ip prio 1 handle 60 fw police rate 100kbit burst 20kbit drop flowid :1 Can you please tell me what I am missing here ?

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  • Mirror network packets from WiFi to Ethernet in an ASUS Router RT N53

    - by fazineroso
    I have an ASUS RT N53 router, running the default firmware (Linux 2.6.22 with busybox and uclibc). I need to capture data packets from some Wi-Fi devices I have connected to that router (iPad and some smartphones), but the router is not forwarding any package coming from Wi-Fi devices to the Ethernet Ports. Any idea how can I proceed? Available tools in the router are iptables (no tee option, though), ebtables, brctl... Currently the ethernet and Wifi devices are forming a bridge: # brctl show bridge name bridge id STP enabled interfaces br0 8000.50465dc06be2 no vlan0 eth1 No ebtables rules: # ebtables -L Bridge table: filter Bridge chain: INPUT, entries: 0, policy: ACCEPT Bridge chain: FORWARD, entries: 0, policy: ACCEPT Bridge chain: OUTPUT, entries: 0, policy: ACCEPT

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  • Rsyslog : copy with change the facility

    - by Dom
    I have saslauthd with save the logs in LOG_AUTH in our rsyslogd server. It can't be changed without recompiling, and I don't want to do that. I would like to see all the LOG_AUTH in LOG_MAIL, because I do an export to an external machine, and I would like to see all the saslauthd logs in LOG_MAIL in the distant server. Of course, in local I can add "auth.* " in the mail.log file section, but the export will not be in the right file because I filter in export by syslog Facility/Priority. How can I export all the AUTH logs into MAIL logs ? Thanks

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  • Windows PC's Intermittant Network faults.

    - by Kristiaan
    Hello everyone, im running into some issues with our client PC's (windows xp sp3 systems). this morning we ran into some problems with PC's not connecting to internal / external systems intermittantly. this would manifest as a problem connecting to any service, email, web, backoffice database systems etc. given a random amount of time be it a few minutes etc the problem would disapear and the pc would carry on as normal, some systems however have not been able to connect to certain sytems since the problem initally happened. im hoping for some suggestions / network diag advice really to help me locate the cause of this problem. all the clients are windows xp, connecting to a domain controller that is windows 2003 std this server also acts as a DNS server for us. we also have websense 7.0.1 installed on it to filter traffic.

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  • Out-of-memory algorithms for addressing large arrays

    - by reve_etrange
    I am trying to deal with a very large dataset. I have k = ~4200 matrices (varying sizes) which must be compared combinatorially, skipping non-unique and self comparisons. Each of k(k-1)/2 comparisons produces a matrix, which must be indexed against its parents (i.e. can find out where it came from). The convenient way to do this is to (triangularly) fill a k-by-k cell array with the result of each comparison. These are ~100 X ~100 matrices, on average. Using single precision floats, it works out to 400 GB overall. I need to 1) generate the cell array or pieces of it without trying to place the whole thing in memory and 2) access its elements (and their elements) in like fashion. My attempts have been inefficient due to reliance on MATLAB's eval() as well as save and clear occurring in loops. for i=1:k [~,m] = size(data{i}); cur_var = ['H' int2str(i)]; %# if i == 1; save('FileName'); end; %# If using a single MAT file and need to create it. eval([cur_var ' = cell(1,k-i);']); for j=i+1:k [~,n] = size(data{j}); eval([cur_var '{i,j} = zeros(m,n,''single'');']); eval([cur_var '{i,j} = compare(data{i},data{j});']); end save(cur_var,cur_var); %# Add '-append' when using a single MAT file. clear(cur_var); end The other thing I have done is to perform the split when mod((i+j-1)/2,max(factor(k(k-1)/2))) == 0. This divides the result into the largest number of same-size pieces, which seems logical. The indexing is a little more complicated, but not too bad because a linear index could be used. Does anyone know/see a better way?

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  • git - recover deleted files from a prior commit

    - by Walter White
    I accidentally deleted some files in a prior commit and would like to recover them. How can I do this? I ran this and found exactly what I was looking for: git whatchanged --diff-filter=D At the time I made the commit, I should have committed the new/changed files only and ran a reset --hard then to recover the missing files. I have about 100 files that I need to restore. I don't want to do a straight revert as that will also undo the changes in that commit. Any ideas?

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  • How can I search for Gmail conversations that have more than one e-mail? [closed]

    - by Matt Refghi
    I previously used a service that sent me Slashdot articles as individual e-mails. All I had to do was give them the RSS url, and they handled the rest. On the Gmail side, I simply made a filter, labeling these e-mails as "News". Once I stopped using the service, I realized that I had more than 20,000 such e-mails stockpiled. While I could delete all "News" e-mails, there are some that I've forwarded to friends, sometimes receiving multiple replies. These conversations are valuable - I would like to keep them. As far as I can tell, there's no way to search for conversations that have more than one e-mail in the thread. Up until now, I've been deleting them page by page, carefully de-selecting the conversations that have more than one e-mail; however, it will take far too much time to complete. Is there an easier way that I'm missing? Thanks.

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  • Web scrapping from a Google Chrome extension

    - by limoragni
    I've started to develop a Chrome extension to navigate and prform actions on a website. Until now the extension is able to receive a couple of parameters and check a set of radio-buttons, fill in a few inputs of a form and then submit it. What I want to do now is to repeat the process, but I'm stuck when the page is reloaded. And I don't know how can I do to make the script reacts to the finish of the request. The workflow I want to achieve is the following (is for automaticly copying a certain object): Popup side Enter the number of the Master object to copy Enter the base name of the copies (example Mod, so the I can iterate and add mod1, mod2, modn) Enter the number of copies Background side Select master Select standard options Fill in inputs Submit form Wait for the page to complete the request and continue to the next copy. (here I need help) The problem is on the repetition, the rest is taking care of. I assume that must be a way of dealing with requests. Any ideas? By the way I'm doing it all with the extension and tabs methods of google chrome plus javascript and jquery.

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  • is there any valid reason for users to request phpinfo()

    - by The Journeyman geek
    I'm working on writing a set of rules for fail2ban to make life a little more interesting for whoever is trying to bruteforce his way into my system. A good majority of the attempts tend to revolve around trying to get into phpinfo() via my webserver -as below GET //pma/config/config.inc.php?p=phpinfo(); HTTP/1.1 GET //admin/config/config.inc.php?p=phpinfo(); HTTP/1.1 GET //dbadmin/config/config.inc.php?p=phpinfo(); HTTP/1.1 GET //mysql/config/config.inc.php?p=phpinfo(); HTTP/1.1 I'm wondering if there's any valid reason for a user to attempt to access phpinfo() via apache, since if not, i can simply use that, or more specifically the regex GET //[^>]+=phpinfo\(\) as a filter to eliminate these attacks

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  • Split node list to parts.

    - by Kalinin
    xml: <mode>1</mode> <mode>2</mode> <mode>3</mode> <mode>4</mode> <mode>5</mode> <mode>6</mode> <mode>7</mode> <mode>8</mode> <mode>9</mode> <mode>10</mode> <mode>11</mode> <mode>12</mode> i need to separate it on parts (for ex. on 4): xslt: <xsl:variable name="vNodes" select="mode"/> <xsl:variable name="vNumParts" select="4"/> <xsl:variable name="vNumCols" select="ceiling(count($vNodes) div $vNumParts)"/> <xsl:for-each select="$vNodes[position() mod $vNumCols = 1]"> <xsl:variable name="vCurPos" select="(position()-1)*$vNumCols +1"/> <ul> <xsl:for-each select="$vNodes[position() >= $vCurPos and not(position() > $vCurPos + $vNumCols -1)]"> <li><xsl:value-of select="."/></li> </xsl:for-each> </ul> </xsl:for-each> this code is written by Dimitre Novatchev - great coder)) but for the number of nodes less then number of parts (for ex. i have 2 modes) this code does not work - it outputs nothing. How it upgrade for that case (without choose construction)?

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  • Is it possible to remove buzzing from headphones which occurs only when scrolling / window redrawing?

    - by Billy ONeal
    Whenever a lot of drawing is happening on my laptop a buzzing noise is emitted by the sound hardware, which is clearly audible with headphones (similar to this question or this one). I've tried both the headphone jack on the laptop itself, and also on the dock. I've used other laptops and they all seem to have similar problems here, which leads me to believe this is more a function of relatively low quality laptop sound hardware than any fault with the headphones or this laptop in particular. I'm curious if there's some piece of hardware I might use to eliminate the buzzing. For instance, would an external USB sound device fix the problem or is it likely subject to the same kinds of issues? Would a simple filter/choke on the headphone cord itself possibly help? Or is one simply stuck with poor quality audio from laptops period?

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  • Reducing volume of an audio device on windows 7

    - by bdonlan
    I have a USB headset with a very loud amplifier, but low granularity in its gain control. In order to get comfortable audio, I have to reduce the individual application levels in the mixer to '1', and the master mixer to around '10'. Of course, new applications start out at '10', and immediately blast out my ears. Is there a way to add a filter to cut down the volume some so I can get better control of it? That is, reduce the volume of '100' so I can work within a reasonable range.

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  • Postfix - How to process incoming emails?

    - by Borivojevic
    Hello Does anybody know how to process incoming emails for virtual mailboxes in postfix? I am building web application where users add new content by sending emails to application. Email address used for each user is custom (eg. [email protected]) and it is dynamically created as a Postfix virtual mailbox. User needs to be able to send email to his custom mailbox address ([email protected]) and i want to process each incoming email, parse it's contents and populate my database with data from email. I tried using Postfix After Queue filter but what i really wont is to process emails once they are saved in users virtual mailbox folder.

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  • Ajax post not posting email address ?

    - by jeitjet
    UPDATE: It will not work in Firefox, but will work on any other browser. I even tried loading Firefox in safe mode (disabling all plugins, etc.) and still no worky. :( I'm trying to do an AJAX post (on form submission) to a separate PHP file, which works fine without trying to send an email address through the post. I'm fairly new to AJAX and pretty familiar with PHP. Here's my form and ajax call <form class="form" method="POST" name="settingsNotificationsForm"> <div class="clearfix"> <label>Email <em>*</em><small>A valid email address</small></label><input type="email" required="required" name="email" id="email" /> </div> <div class="clearfix"> <label>Email Notification<small>...when a new subscriber joins</small></label><input type="checkbox" name="subscribe_notifications" id="subscribe_notifications"> Receive an email notification with phone number when someone new subscribes to 'BIZDEMO' </div> <div class="clearfix"> <label>Email Notification<small>...when a subscriber cancels</small></label><input type="checkbox" name="unsubscribe_notifications" id="unsubscribe_notifications"> Receive an email notification with phone number when someone new unsubscribes to 'BIZDEMO' </div> <div class="action clearfix top-margin"> <button class="button button-gray" type="submit" id="notifications_submit"><span class="accept"></span>Save</button> </div> </form> and AJAX call: <script type="text/javascript"> jQuery(document).ready(function () { $("#notifications_submit").click(function() { var keyword_value = '<?php echo $keyword; ?>'; var email_address = $("input#email").val(); var subscribe_notifications_value = $("input#subscribe_notifications").attr('checked'); var unsubscribe_notifications_value = $("input#unsubscribe_notifications").attr('checked'); var data_values = { keyword : keyword_value, email : email_address, subscribe_notifications : subscribe_notifications_value, unsubscribe_notifications : unsubscribe_notifications_value }; $.ajax({ type: "POST", url: "../includes/ajax/update_settings.php", data: data_values, success: alert('Settings updated successfully!'), }); }); }); and receiving page: <?php include_once ("../db/db_connect.php"); $keyword = FILTER_INPUT(INPUT_POST, 'keyword' ,FILTER_SANITIZE_STRING); $email = FILTER_INPUT(INPUT_POST, 'email' ,FILTER_SANITIZE_EMAIL); $subscribe_notifications = FILTER_INPUT(INPUT_POST, 'subscribe_notifications' ,FILTER_SANITIZE_STRING); $unsubscribe_notifications = FILTER_INPUT(INPUT_POST, 'unsubscribe_notifications' ,FILTER_SANITIZE_STRING); $table = 'keyword_options'; $data_values = array('email' => $email, 'sub_notify' => $subscribe_notifications, 'unsub_notify' => $unsubscribe_notifications); foreach ($data_values as $name=>$value) { // See if keyword is already in database table $filter = array('keyword' => $keyword); $result = $db->find($table, $filter); if (count($result) > 0 && $new != true) { $where = array('keyword' => $keyword, 'keyword_meta' => $name); $data = array('keyword_value' => $value); $db->update($table, $where, $data); } else { $data = array('keyword' => $keyword, 'keyword_meta' => $name, 'keyword_value' => $value); $db->create($table, $data); $new = true; // If this is a new record, always go to else statement } } unset($value); Here are some weird things that happen: When I only enter text into the email field, (i.e. - abc), it works fine, posts correctly, etc. When I enter a bogus email address with the "." before the "@", it works fine When I enter a validated email address (with the "." after the "@"), the post fails. Ideas?

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  • Exchange 2007 automatically adding IP to block list

    - by Tim Anderson
    This puzzled me. We have all mail directed to an ISP's spam filter, then delivered to SBS 2008 Exchange. One of the ISP's IP numbers suddenly appeared in the ES2007 block list, set to expire in 24 hours I think, so emails started bouncing. Quick look through the typically ponderous docs, and I can't see anything that says Exchange will auto-block an IP number, but nobody is admitting to adding it manually and I think it must have done. Anyone know about this or where it is configured? Obviously one could disable block lists completely but I'd like to know exactly why this happened.

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  • How to detect an iPhone connecting a network?

    - by JayCrossler
    I've noticed through watching Wireshark that when an iPhone connects to a wifi network, it sends out a few IGMP/MDNS packets to 224.0.0.251 (LAN broadcast, I think). Is there any easy way to watch for these packets and then either run a script or send an event? Or, is the best way to just run a packet sniffer? Any simple ones that can send events or execute curl commands when a filter is triggered? When I run nc -u -l 5353 I get: My-Name-iPhonelocal??? x???)?? ??cc^C Can I do something like: nc -u -l 5353 | grep iPhonelocal | execute command...

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  • Slideshow positioning problem

    - by James
    I have a javascript slideshow that works perfectly on Windows 7, Firefox, Chrome, IE 8+ (I don't have the resources to check 6 or 7) and Opera. But I've been told that when on xp with IE 7 the slidshow gets thrown off screen to the right. What could my issue be? Here is my css: #page { width:940px; margin: auto; } gallery { position:relative; padding:0px; margin:5px 0px; width:940px; height:320px; } gallery li { display: block; width:940px; height:320 list-style:none; } And here is my javascript: var galleryId = 'gallery'; var gallery; var galleryImages; var currentImage; var previousImage; var preInitTimer; preInit(); function preInit() { if ((document.getElementById)&&(gallery=document.getElementById(galleryId))) { gallery.style.visibility = "hidden"; if (typeof preInitTimer != 'undefined') clearTimeout(preInitTimer); } else { preInitTimer = setTimeout("preInit()",2); } } function fader(imageNumber,opacity) { var obj=galleryImages[imageNumber]; if (obj.style) { if (obj.style.MozOpacity!=null) { obj.style.MozOpacity = (opacity/100) - .001; } else if (obj.style.opacity!=null) { obj.style.opacity = (opacity/100) - .001; } else if (obj.style.filter!=null) { obj.style.filter = "alpha(opacity="+opacity+")"; } } } function fadeInit() { if (document.getElementById) { preInit(); galleryImages = new Array; var node = gallery.firstChild; while (node) { if (node.nodeType==1) { galleryImages.push(node); } node = node.nextSibling; } for(i=0;i galleryImages[i].style.position='absolute'; galleryImages[i].style.top=0; galleryImages[i].style.zIndex=0; fader(i,0); } gallery.style.visibility = 'visible'; currentImage=0; previousImage=galleryImages.length-1; opacity=100; fader(currentImage,100); window.setTimeout("crossfade(100)", 1000); } } function crossfade(opacity) { if (opacity < 100) { fader(currentImage,opacity); opacity += 9; window.setTimeout("crossfade("+opacity+")", 50); } else { fader(previousImage,0); previousImage=currentImage; currentImage+=1; if (currentImage=galleryImages.length) { currentImage=0; } galleryImages[previousImage].style.zIndex = 0; galleryImages[currentImage].style.zIndex = 100; opacity=0; window.setTimeout("crossfade("+opacity+")", 5000); } } addEvent(window,'load',fadeInit) function addEvent(elm, evType, fn, useCapture) { if (elm.addEventListener){ elm.addEventListener(evType, fn, useCapture); return true; } else if (elm.attachEvent){ var r = elm.attachEvent("on"+evType, fn); return r; } } And ideas?

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  • Block Websites at Work

    - by user791022
    At work there are about 40 PCs. I want to block all the websites and only allow a few Domains/Websites for operators. A few operators can access anything. I want something quick and easy so I can filter the Block/Allow websites for all computers from one main computer, like a server or something. Windows Vista Home and Windows 7 Home are installed on the PCs. Is there any software can do this? PS: Please don't answer about Microsoft Windows Server OS..

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  • Modular Inverse and BigInteger division

    - by dano82
    I've been working on the problem of calculating the modular inverse of an large integer i.e. a^-1 mod n. and have been using BigInteger's built in function modInverse to check my work. I've coded the algorithm as shown in The Handbook of Applied Cryptography by Menezes, et al. Unfortunately for me, I do not get the correct outcome for all integers. My thinking is that the line q = a.divide(b) is my problem as the divide function is not well documented (IMO)(my code suffers similarly). Does BigInteger.divide(val) round or truncate? My assumption is truncation since the docs say that it mimics int's behavior. Any other insights are appreciated. This is the code that I have been working with: private static BigInteger modInverse(BigInteger a, BigInteger b) throws ArithmeticException { //make sure a >= b if (a.compareTo(b) < 0) { BigInteger temp = a; a = b; b = temp; } //trivial case: b = 0 => a^-1 = 1 if (b.equals(BigInteger.ZERO)) { return BigInteger.ONE; } //all other cases BigInteger x2 = BigInteger.ONE; BigInteger x1 = BigInteger.ZERO; BigInteger y2 = BigInteger.ZERO; BigInteger y1 = BigInteger.ONE; BigInteger x, y, q, r; while (b.compareTo(BigInteger.ZERO) == 1) { q = a.divide(b); r = a.subtract(q.multiply(b)); x = x2.subtract(q.multiply(x1)); y = y2.subtract(q.multiply(y1)); a = b; b = r; x2 = x1; x1 = x; y2 = y1; y1 = y; } if (!a.equals(BigInteger.ONE)) throw new ArithmeticException("a and n are not coprime"); return x2; }

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  • Formula in table header cells

    - by Cylindric
    I have a table in Excel 2007 that I want to summarise, in a similar fashion to a Pivot Table, but for various reasons I can't use a pivot table. I like the "Format as table" features of sort and filter buttons, automatic formatting etc, so have used that to create a simple table: A B C N +-----------+------------+------------+-------+------------+ 1 | | 01/01/2010 | 01/02/2010 | ... | 01/12/2010 | +-----------+------------+------------+-------+------------+ 2 | CategoryA | 15 | 545 | | 634 | 3 | CategoryB | 32 | 332 | | 231 | 4 | CategoryC | 5 | 234 | | 644 | | ... | | | | | 27 | CategoryZ | 2 | 123 | | 64 | +-----------+------------+------------+-------+------------+ The numbers are retrieved from a "back-end" pivot table using GETPIVOTDATA(). All that works fine. Now, the problem is that I can't seem to use formulas for my column headings in these new "smart" tables - they are converted to text or just broken. For example if in B1 I put NOW(), I don't get the date, I get 00/01/1900. Is there any way of getting a formula to work in the auto tables? Or do I have to use standard tables and manually alternate-colour my rows etc?

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  • Can I make Emailing an address that forwards back to me appear in the inbox?

    - by Zach L
    I have a gmail address that's my primary email. I have a couple short email addresses on my own domain that I have set to forward to the gmail acct. For various reasons, I like to email these addresses from my gmail account (which then forward back to myself). The frustration is, these emails do not show up in my inbox - only the ALL MAIL tab. There's a filter for skip the inbox. Why can't there be one for put it in the inbox?

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  • Using pair in c++

    - by user1543957
    Can someone please tell why i am unable to compile the following program #include<iostream> #include<string> #include<cmath> #include<iostream> #include<cfloat> #define MOD 10000009 using namespace std; double distance(pair<int,int> p1,pair<int,int> p2) { double dist; dist = sqrt( (p1.first-p2.first)*(p1.first-p2.first) + (p1.second-p2.second)*(p1.second-p2.second) ); return(dist); } int main() { int N,i,j; cin >> N; pair<int,int> pi[N]; for(i=0;i<N;i++) { cin >> pi[i].first >> pi[i].second; } for(i=0;i<N;i++) { cout << pi[i].first << " "<< pi[i].second << endl; } distance(pi[0],pi[1]); // This line is giving error return 0; }

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  • How to forbid postfix to send to external domains [closed]

    - by elhoim
    I have a local postfix server, and i want it to only relay emails to the only local domain (localdomain.be): myhostname = localdomain.be mydomain = localdomain.be alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = $myhostname mydestination = $myhostname relay_domains = $mydomain default_transport = smtp relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 10.0.0.0/24 mailbox_size_limit = 64000000 message_size_limit = 1000000 recipient_delimiter = + inet_interfaces = all inet_protocols = all smtp_host_lookup = native This configuration works fine to allow relay mail locally and on external destination domains, but i would like it to be an impossibility to send to other domains (ie: gmail.com). relay_domains is supposed to ensure that but it does not seem to really filter since i can still send to my gmail address.

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