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• JavaScript malware analysis

  - by begueradj

  I want to test websites for JavaScript malware presence . I plan to develop a Python program that sends the URL of a given website to a virtual machine where the dynamic execution of the eventual malicious JavaScript embedded in the website's page is monitored. My questions: Should my VM be Windows or Linux ? What if the malware damages my VM: is there a hint how to avoid that ? Or launch a new VM automatically instead ? If I use telnet client library to communicate with the VM: must I implement a server within the VM to deal with my queries or can I overcome this ? I am jut looing for hints, general ideas. Thank you for any help.

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• In database table design, how does "Virtual Goods" affect table design -- should we create an instan

  - by Jian Lin

  When we design a database table for a DVD rental company, we actually have a movie, which is an abstract idea, and a physical DVD, so for each rental, we have a many-to-many table with fields such as: TransactionID UserID DvdID RentedDate RentalDuration AmountPaid but what about with virtual goods? For example, if we let a user rent a movie online for 3 days, we don't actually have a DVD, so we may have a table: TransactionID UserID MovieID RentedDate RentalDuration AmountPaid should we create a record for each instance of "virtual good"? For example, what if this virtual good (the movie) can be authorized to be watched on 3 devices (with 3 device IDs), then should we then create a virtual good record in the VirtualGoods table, each with a VirtualGoodID and then another table that has VirtualGoodID DeviceID to match up the movie with the DeviceIDs? We can also just use the TransactionID as the VirtualGoodID. Are there circumstances where we may want to create a record to record this "virtual good" in a VirtualGoods table?

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• Virtual network interface in Mac OS X

  - by Hans Doggen

  I know that you can make a virtual network interface in Windows (see here), and in Linux it is also pretty easy with ip-aliases, but does something similar exist for Mac OS X? I've been looking for loopback adapters, virtual interfaces and couldn't find a good solution. You can create a new interface in the networking panel, based on an existing interface, but it will not act as a real fully functional interface (if the original interface is inactive, then the derived one is also inactive). This scenario is needed when working in a completely disconnected situation. Even then, it makes sense to have networking capabilities when running servers in a VMWare installation. Those virtual machines can be reached by their IP address, but not by their DNS name, even if I run a DNS server in one of those virtual machines. By configuring an interface to use the virtual DNS server, I thought I could test some DNS scenario's. Unfortunately, no interface is resolving DNS names if none of them are inactive...

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• Tomcat - virtualhosting - name / ip / port - based

  - by lisak

  Hey, what are the usage scenarios for these kinds of virtual hosting ? Name Based - typical tomcat virtual hosting, one HOME instance with many contexts, each as an individual host IP based / port based - multiple instances of tomcat ( how is it with performance and memory consuption?) running on IP aliases (virtual IPs) for one network adapter, usually behind http apache server that can run name based virtual hostings. Otherwise I can't figure out how would I forward requests in iptables/firewall based on IP address, which is just one. How is IP based virtual hosting done as to Tomcat and multiple instances ? I'd like to hear some usage scenarios from your experience. How are you running your applications. Cause there are applications having it's own modified classloader and they are developed in a way to run alone withing a tomcat instance. Then there are trivial applications which can run within one instance without problems. Many thanks

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• Virtual Memory and Paging

  - by Kenshin

  Hello, I am doing some exercices to understand how the virtual memory and paging works, my question is as follows : Suppose we use a paged memory with pages of 1024 bytes, the virtual address space is of 8 pages but the physical memory can only contain 4 frames of pages. Replacement policy is LRU. What is the physical address in main memory that corresponds to virtual address 4096? and how do you get to that result? Same thing as question 1 but with virtual address 1024 A page fault occurs when accessing a word in page 0, which page frame will be used to receive the virtual page 0? Page Image

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• jsp get ip address

  - by Alan

  Hello, whats the best way of preventing someone from voting twice? How do i get the users ip address? What if they are on a large network? will everyone on that network show the same ip? thanks UPDATE: request.getRemoteAddr() and request.getRemoteHost() return the Server names, not the client's host name and ip. Anyone else got any bright ideas? Ok, so lets forget about the voting twice thing. Im just trying to get the users ip address? i tried request.getRemoteAddr() and request.getRemoteHost() and think im getting the servers address. I have access to two separate networks and am getting the same IP address :(

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• App with MVC Virtual application shared AuthCookie.

  - by Razcer

  I have a 3.5 ASP.Net WebForm parent application. The parent uses forms authentication. I have a MVC child virtual application, I would like to make it so the user logs in to the parent application, user then navigates to the virtual application by pressing a link on the parent. However every time I do this it goes to the login screen for the virtual application. Is there a web setting I should double check in Parent? Or Child? Is there an IIS setting that I should check? Should I be using a virtual directory instead of virtual application? I want the child to be able to access the Session[] from the parent. I would like the child app to use the same authCookie as the parent app.

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• Extract IP address from an html string (python)

  - by GoJian

  My Friends, I really want to extract a simple IP address from a string (actually an one-line html) using Python. But it turns out that 2 hours passed I still couldn't come up with a good solution. >>> s = "<html><head><title>Current IP Check</title></head><body>Current IP Address: 165.91.15.131</body></html>" -- '165.91.15.131' is what I want! I tried using regular expression, but so far I can only get to the first number. >>> import re >>> ip = re.findall( r'([0-9]+)(?:\.[0-9]+){3}', s ) >>> ip ['165'] In fact, I don't feel I have a firm grasp on reg-expression and the above code was found and modified from elsewhere on the web. Seek your input and ideas!

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• Accessing apache on virtual pc

  - by Rick Hensly

  I am using a virtual pc to test my website. I can access all my webpages on the virtual pc. However, images don't load correctly. I can browse to my images folder and view all of them. However, if I click an image it will not load, and the apache log shows the virtual pc's ip trying to view the image: 192.168.0.55 - - [25/Jun/2009:20:10:41 -0400] "GET /images/pic.png HTTP/1.1" 302 220 Now, if I refresh the page it loads. 192.168.0.55 - - [25/Jun/2009:20:10:51 -0400] "GET /images/bg.png HTTP/1.1" 200 214 Also, images won't load in html or css. It seems like a redirecting problem or something, but I have no clue how to fix it. Thanks for any advice

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• Check packet vlan tag using Tap virtual interface

  - by ankit

  Hi all, I am trying to learn how to implement virtual interfaces using the Tap driver. So far my understanding is that using the tap driver I can create a virtual interface and then have a userspace program attach to this interface to analyse the data coming into this device. Now what if I attach a cisco switch to my LAN interface using a TRUNK link, forward all the packets coming into the LAN interface to the virtual tap interface and then in my program attached to this interface do some coding to analyze the vlan tag in the packet and only allow certain vlans to be forwarded to the WAN interface ? Does this sound plausible or is there is flaw in my basic understanding ? Thanks for the help! ankit

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• Centos Virtual host loading default page

  - by ntechi

  I have asked a question which was related to this but not same, I have a centos VPS, which has two wordpress websites, one is mbas.co.in and another is onlinemba123.com, now for virtual hosting using just ONE IP ADDRESS, first I started mbas.co.in, which is working fine, when I added onlinemba123.com then, it is loading default Centos page instead of my website, and I am just testing my onlinemba123 website, I haven't configured DNS for it, I am testing it through editing my PC's hosts file, My website folder names are also same as in the conf file below Now my question is how can I load my website instead of Default page, is my virtual host config fine? My virtual host config: NameVirtualHost *:80 <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html/www.mbas.co.in ServerName mbas.co.in ErrorLog logs/mbas.co.in-error_log CustomLog logs/mbas.co.in-access_log common </VirtualHost> <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/html/www.onlinemba123.com ServerName www.onlinemba123.com ErrorLog logs/onlinemba123-error_log CustomLog logs/onlinemba123-access_log common </VirtualHost> My computers host file is: xx.xxx.xxx.xxx www.onlinemba123.com

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• Disable ProxyPass rules within a virtual host on apache 2

  - by chinto

  I have a global proxypass rule in httpd.conf rules at global level ProxyPass /test/css http://myserver:7788/test/css ProxyPassReverse /test/css http://myserver:7788/test/css and I have a virtual host Listen localhost:7788 NameVirtualHost localhost:7788 <VirtualHost localhost:7788> Alias /test/css/ "C:/jboss/server/default/deploy/test.ear/test-web-app.war/css/" </VirtualHost> I would like to disable all global proxypass rules applying in this virtual host? NoProxy doesn't seem to work. (The reason I would like to do this is I have below global rules which create a 502 proxy loop if applied within this virtual host #pass all requests to application server ProxyPass /test http://localhost:8080/test ProxyPassReverse /test http://localhost:8080/test ) What I'm trying to do is, serve all static content (like css) using apache, while still proxying all the rest of requests to the application server.

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• Blocking all RIPE Addresses in Server 2008?

  - by Brett Powell

  Our datacenter has recommended we block all RIPE IP Addresses on one of our machines. It is constantly being DDoS Attacked everytime the null routes are lifted, so I am not sure how this would help, but am more than willing to try anything now. I couldn't find much information on it from a Google search, but how can we block all RIPE IP Ranges? Preferably I wouldn't even mind blocking all Ranges that were not US Based since that is the only target we traffic, but this is probably too difficult.

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• Fortigate - Accessing a Virtual Server address from several interfaces

  - by Jeremy G

  I am setting up a new application in its own DMZ on our Fortigate 300C firewalls. I have defined a load-balancing configuration for part of the application, and this works fine for traffic coming in from our internal network. However, I would also like this application to be reachable from other DMZs, for inter-application traffic, and from the SSL VPN interface. I can't seem to define the required policy, and it seems this is due to Virtual Servers being bound to the client interface on the Fortigate rather than the server interface (and so my virtual IP is not accessible from any of these other interfaces) Does anyone have an idea how I might go about this ? I guess I could create other virtual IPs for each interface, but this gets complicated to handle as clients need to change the address they use depending on how they are connecting. Thanks, Jeremy G

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• Add IP Address without Plesk

  - by CrackerJack9

  I have an dedicated unmanaged server and added a few IP addresses to it (allocated), and the only information my hosting company has provided is instructions on how to use Plesk to Add IP Addresses. However, one of the first things I did was uninstall Plesk (for numerous reasons). Does anyone know what exactly Plesk does when you "Add IP Address"? Does it just create an alias on the default interface (I currently only have one and the loopback)? I can manage that myself without Plesk, but I was hoping someone might know if there is anything else Plesk does. I also have DHCP Client running (eth0 is static), not sure why my hosting company put that there either, and not sure if they're related.

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• Cannot access virtual machine via ping from the physical host machine

  - by Kenni

  I'm installing a FreeBSD Server on VirtualBox. I set up the IP address (192.168.10.5) for the virtual server to run a mail server and the host computer(Windows 7) with 192.168.10.184. The two machines cannot communicate or connect to each other. I cannot ping from the virtual machine to the host and vice versa. The host machine connects to a LAN. I want the mail server to run frm a VMachine. I think it's a problem with the network configuration of the virtual machine.

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• 403 forbidden .htaccess issue

  - by Gkhan14

  I have this .htaccess file in one directory on my site: <limit GET> order deny,allow deny from all allow from 123.456.789 </limit> ErrorDocument 403 403.html It blocks everyone except for one IP. However, when an invalid IP visits, it does not show the 403.html file, but it just shows the text "403.html" on the page. When I try to directly visit the 403.html page on the directory, it gets the same message too.

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• iptables prerouting to redirect source ip address on ethernet

  - by Kevin Campion

  I have 2 ip adresses on the Internet who redirect on the same machine. On this machine, one Debian runs on OpenVZ. I can set iptables rules to redirect all http request to the Debian. iptables prerouting -d ip_address_2 DNAT --to ip_address_local_1 +--------------+ | | | V | ip_address_local_1 I| +------+ +----------+ N|ip_address_1 | |-----|Debian1 VE|-- Apache's log T|-----------------|OpenVZ| +----------+ [client ip_address_1] E| | | | R|ip_address_2 | | | N|--------------+ | | E| +------+ T| Iptables' rules : iptables -t nat -A PREROUTING -p tcp -i eth0 -d ip_address_2 --dport 80 -j DNAT --to ip_address_local_1:80 iptables -A FORWARD -p tcp -i eth0 -o venet0 -d ip_address_local_1 --dport 80 -j ACCEPT iptables -A FORWARD -p tcp -i venet0 -o eth0 -s ip_address_local_1 --sport 80 -j ACCEPT When I go to webpage with "http://ip_address_2", I can see the good content but the ip address on access log file is ip_address_1, I would like to see my ISP's ip address. Any ideas?

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• Slow performance by PHP directory operations on virtual machine (Ubuntu libvirt)

  - by thonixx

  Some days ago I installed an Ubuntu server and two running virtual machines with libvirt. Everything works fine except one performance problem. Everytime when I call a PHP script with directory operations the operations are very slow and not performant. Here is an example: http://zother.white-tiger.ch/ And here you see an example without a directory operation and how fast it is: http://michaeltanner.ch/ It's all on the same virtual server. The virtual machine uses 6 cores (8 are available) and 7500 megabytes RAM (8 Gigabyte are available). The disk image format is qcow2. How can I improve the performance?

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• Does pointing *.[int].mydomain.com to 192.168.1.[int] constitute a security threat

  - by Dave

  For testing purposes, I've found it's really useful to point whatever.machineIP.mydomain.com to 192.168.1.machineIP : that way we can test each other's code without fidgetting with hosts files. I'm aware that this identifies our local IP addresses to the outside world, but if someone could access the network, it'd be trivial to sniff which of the local IP addresses respond to port 80 anyway. Is there anything I'm not seeing? Credit for the idea: http://news.ycombinator.com/item?id=1168896

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• Disable ProxyPass rules within a virtual host on apache 2

  - by chinto

  I have a global proxypass rule in httpd.conf rules at global level ProxyPass /test/css http://myserver:7788/test/css ProxyPassReverse /test/css http://myserver:7788/test/css and I have a virtual host Listen localhost:7788 NameVirtualHost localhost:7788 <VirtualHost localhost:7788> Alias /test/css/ "C:/jboss/server/default/deploy/test.ear/test-web-app.war/css/" </VirtualHost> I would like to disable all global proxypass rules applying in this virtual host? NoProxy doesn't seem to work. (The reason I would like to do this is I have below global rules which create a 502 proxy loop if applied within this virtual host #pass all requests to application server ProxyPass /test http://localhost:8080/test ProxyPassReverse /test http://localhost:8080/test ) What I'm trying to do is, serve all static content (like css) using apache, while still proxying all the rest of requests to the application server.

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• Logging Bounced messages to a Database (Postfix with virtual domains/users)

  - by Gurunandan

  We have a postfix installation with a couple of virtual domains each with virtual users. These domains and users are mapped using a mysql database. I have been until now tracking bounces by parsing the postfix log file. I suspect there must be better and more efficient ways of doing this. I thought of three but I am not sure what is best: Write a Postfix content filter that logs the bounce and throws away the mail Use procmail - but I am not sure how procmail would work with virtual users who have no $HOME defined Write a script that POPs mail from mailboxes; parses and logs them and deletes the bounced email I would appreciate advise on which would be best from a maintenance point of view and efficient from conserving server resources point of view. Thanks

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• Network wide rule to forwared IP address

  - by Patrick

  Hi, we have a virtual machine which hosts a web based bug tracker in our network which is reached internally via e.g. 192.168.1.5:9800. From the outside we made a port forwarding in our firewall so that the web site can be reached via e.g. 72.10.10.10:9800. Now that works fine but the problem is that we got different IP addresses to reach the same service depending if we are in the office or at home and when the service sends out an email the link doesn't always work :) So we are looking for a solution to fix it. One could be to make a rule in out firewall that all communication to 72.10.10.10:9800 is forwarded to 192.168.1.5:9800... If that's possible that is considering it's an IP address + a port. The reason we used a port is because we only got one static public IP address but multiple virtual web appliances. Thanks for any suggestions or solutions :) Patrick PS: The network is a Win 2008 R2 domain by the way

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• Setting up a vpn and IIS IP address restrictions

  - by carpat

  I'm trying to get a VPN set up with internal access only sites. I have set up a VPN on a windows server (single VPS server), and I can connect from a remote computer and I get an IP assigned correctly (from 192.168.1.1 - 255) Next I configured IIS (running on the same machine) IP Address and Domain Restrictions to only allow only IP address range 192.168.1.0 with subnet mask 255.255.255.0 When I connect to the VPN with "Use Default Gateway on Remote Network" (so that requests must go through the vpn), I get a 403 from the internal sites. What did I miss?

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• Reverse DNS Lookup from the Command Line

  - by user41322

  I'd like to get a list of all domains pointed to a certain IP address. Is there a way to get this information from the command line? Nothing like "host", "nslookup" or "dig -x". Those return the hostname of the IP address which, while helpful, is only part of what I want returned.

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