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• ASA Slow IPSec Performance

  - by Brent

  I have a IPSec link between two sites over ASA 5520s running 8.4(3) and I am getting extremly poor performance when traffic passes over the VPN. CPU on the device is 13%, Memory at 408 MB, and active VPN sessions 2 so the load on the device is particularly low. Screenshot of wireshark file transfer between the two hosts over the VPN: The large amount of Header checksum failures is alarming, but I am not sure what to check now. I perf is showing around 4-5 Mbit/sec with differing TCP window sizes. Show Run on the ASA http://pastebin.com/uKM4Jh76 Show cry accelerator stats http://pastebin.com/xQahnqK3

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• How to authorize standard users to install drivers on Windows XP

  - by Dr I

  I'm currently looking for a way to autorize my non administrators users to perform an installation of drivers. Here is the speech: All my users are standard users, they got a VirtualBox Hypervisor if they need the administrator rights. But if they put an USB device on the local machine and try to redirect the device to the Virtual Machine, Windows ask for some Administrator rights. I've try to set up those GPO: Allow standard users to install drivers. Install WHQL Drivers: Allow Silently. I don't know how to do this.

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• I would like to have a publicly accessable linux box hosted elsewhere. Who provides this service?

  - by Eric Wilson

  I would like to have a general purpose linux server available and publicly accessible. I understand that there are no lack of web-hosting companies, but I might want more control over the machine than is typical. I would want the ability to install software, such as an SVN server, and I would like to be able to expose various port numbers, as I may have a variety of extremely low traffic sites that I would want to have available. Obviously, one option is to host such a machine in my home. Is that my only option? Or is what I describe out there, possible as a virtual machine on a larger server?

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• CHROOT for shell script testing

  - by Josh

  I am looking at setting up a shell script in order to properly document and automate the process I am using to setup a few servers we have. In order to test the shell script through its different stages I was thinking a CHROOT would be ideal, since I can wipe out the "virtual root" and create it on the fly. I have never used CHROOT before, however. I was just curious what are the exact steps I would need to follow to implement this process of creating a chroot (with the basic core functions that would be needed to install apache/php/etc.)? and then destroying it?

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• Entire filesystem restore from rdiff-backup snapshot

  - by atmosx

  I'm trying to make a complete system restore from an rdiff-backup. The cli for backing was: rdiff-backup --exclude-special-files --exclude /tmp --exclude /mnt --exclude /proc --exclude /sys / /mnt/backup/ebox/ I created a new partition mounted the partition at /mnt/gentoo and did: rdiff-backup -r /mnt/vol2 /mnt/gentoo However when I try to chroot to this system (following gentoo's manual, which means mounting /dev/ and /proc) I get the following error: chroot: failed to run command/bin/bash': No such file or directory` All this takes place on a Parallels (virtual machine) Debian installation. Any ideas on how to proceed in order to fully restore the system? Best Regards ps. /mnt/gentoo/bin/bash works fine if I execute it. All files and permissions are in place rdiff-backup seems to work just fine. However the system cannot neither boot (exits with kernel panic - cannot find init) or be chrooted.

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• Windows 7: This notification icon is currently not active

  - by icelava

  Some time this week, without any major change done to one of my x64 Windows 7 computers, the Media eject icon goes missing in the systray taskbar area. When I attempt to reset the notification settings, i see this "This notification icon is currently not active" info warning Initially KB945011 managed to restore the icon after a reboot. But now it appears to have disappeared again. It seems to have disappeared (cannot really confirm) after I unlock the physical logon session (which was previously rerouted to a virtual Remote Desktop session). Anybody have knowledge on possible causes to this missing behaviour? UPDATE 1 Feb 11 It seems that happens often when I remote desktop to the computer, I see it from the remote screen, but when i unlock the screen physically, it disappears. It would reappear when I connect to remote desktop again. Hmmmmm.

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• Setting up the metasploitable in virtualbox

  - by SetSlapShot

  I'm supposed to try and use kali to do exploits on metasploitable, but I'll burn that bridge when I get there. My question right now is: How do I set up a host only network on virtualbox? I heard that it was unsafe to run metasploitable in bridged networking mode, that host only or NAT is better. When I run metasploitable on NAT, the kali box (attacker) has the same ip address as the metasploitable box, and nmap doesn't really return anything except what I can only assume would be a scan of its own ports? I tried to create a host only network in virtual box. I left the adapter settings at the default, and unchecked DHCP server. now when I run ifconfig on the metasploitable box, there is no ip address listed. Am I setting up/connecting to/not configuring the host only network correctly?

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• MMS gets hostname from uname and can't connect to it

  - by Adam Monsen

  I'm trying to get 10gen's MongoDB Monitoring Service monitoring my 3-node replica set. The replica set running in an AWS VPC. Each node runs on a different [virtual] machine. Assume their IPs are 192.168.1.1 (primary or secondary), 192.168.1.2 (primary or secondary), 192.168.1.3 (arbiter). From a quick look at the source, MMS appears to get the hostname of the machine it is running on like so: platform.uname()[1] For my VPC EC2 instance, this returns something like ip-192-168-1-1 MMS then tries to connect to this hostname, which does not resolve. I'd rather just use IP addresses (since they're always static), but it seems like the hardcoded use of platform.uname()[1] in mmsAgent.py precludes that. So, what's an elegant way out of this? Hack /etc/hosts? I'm not setting up a DNS server just for this. Maybe I'm just misunderstanding how to configure MMS.

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• Relation between Apache and DNS configuration

  - by KayKay

  I configured my DNS (bind9) to accept every subdomain, using a wildcarded 'A' record : *.mydomain.tld. IN A xx.xx.xx.xx I configured Apache to serve some specific subdomains using virtual hosts : <VirtualHost *:80> ServerName sub1.mydomain.tld ServerAlias sub1.mydomain.tld JkMount / sub1JK JkMount /* sub1JK </VirtualHost> when I ping from a remote computer on a subdomain configured in apache I get a response. When I ping on a subdomain that is not configured in apache, the host is not found. I don't understand why apache configuration would affect DNS resolution like this? I would appreciate any information that helps me understand this. Thanks a lot.

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• Encrypt temporary password using public ssh key

  - by David M. Syzdek

  I manage a virtual office and our staff uses both SSH keys and passwords for authentication. If one of our staff forgets his password, is there a way to encrypt a temporary password using his public RSA ssh key so I can send it to him via e-mail? I've seen other questions related to this one, however the "answers" generally recommend against using the public/private SSH keys to perform general encryption/decryption and do not actually state if this is possible. I would like to know if it is indeed possible and what are the steps to encrypt and then decrypt the password.

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• Apache Configuration Issue - website without www going to default site

  - by Brian

  I have included a copy of my virtual host file for apache below. (However I have hidden the ip address and domain name for now) My problem is that the following work: www.mydomainnamehere.org www.mydomainnamehere.com mydomainnamehere.com This one doesn't work: mydomainnamehere.org - instead of going to the document root listed below, it goes to the document root of the default site. What could be causing this? <VirtualHost [ipaddresshidden]:80> ServerAdmin [email protected] ServerName mydomainnamehere.org ServerAlias www.mydomainnamehere.org ServerAlias mydomainnamehere.com ServerAlias www.mydomainnamehere.com DocumentRoot /home/www/mydomainnamehere.org/html/ ErrorLog /home/www/mydomainnamehere.org/logs/error.log CustomLog /home/www/mydomainnamehere.org/logs/access.log combined </VirtualHost>

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• Chromium OS Lime installation confusion

  - by Abhinav Kulshreshtha

  I Used to download Chromium Vanilla build Virtual-box image from hexxeh. recently i wanted to try Lime build which only gives a .img file. I used the mentioned Windows Image Writer (link given on the lime website.) and a 8GB Transcend Website. When i tried to boot from pen-drive, the screen only flashed and nothing happened. Now when i tried to access my pendrive, it shows only 0.99 gb capacity. What happened wrong. How can i recover my pendrive. I tried to create vdi using VBoxManage.exe convertdd chromiumos.img chromiumos.vdi command given in This link. But it is not running on VBox either.

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• Openfire Installation Issue - Can't Login to admin panel

  - by Lobe

  I am trying to get Openfire to install on an Ubuntu virtual machine, however upon completing the web based installer, I am unable to login to the admin panel. So far I: downloaded Debian installer Installed using stock options Added database and built the structure using supplied SQL file Completed web based installer I am now trying to login using username: admin and my password, however I constantly get a wrong username/password error. There is a record generated in the MySQL database showing the admin user with an encrypted password, and changing to an unencoded password doesn't work. What is the problem here?

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• VPN ipsec tunnel from router to single windows server computer (gateway-to-host)

  - by Chris Miller

  Firstly, is this possible? The situation: 2 different ISP's. One has several servers and a firewall running. The other is limited to only one virtual server with one network card running windows server 2008r2. I need to set up a site-to-site style VPN using IPsec between the firewall of one ISP and the windows host on the other (gateway-to-host). This host has to run a SQL-Server that I can access from the other ISP's servers through the VPN tunnel. It seems looking at the RFC for IPsec that this should be possible using the features of Windows 2008, but I can't get it to work so far... It seems that I can't access any services running on the same computer or IP address used as the tunnel endpoint? Thanks Chris

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• Top ten security tips for non-technical users

  - by Justin

  I'm giving a presentation later this week to the staff at the company where I work. The goal of the presentation is to serve as a refresher/remidner of good practices that can help keep our network secure. The audience is made up of both programmers and non-technical staff, so the presentation is geared for non-technical users. I want part of this presentation to be a top list of "tips". The list needs to be short (to encourage memory) and be specific and relevant to the user. I have the following five items so far: Never open an attachment you didn't expect Only download software from a trusted source, like download.com Do not distribute passwords when requested via phone or email Be wary of social engineering Do not store sensitive data on an FTP server I have two questions: Do you suggest any additional items? Do you suggest any changes to existing items?

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• Use HAProxy or Nginx to Load Balance between VPS

  - by xperator

  I want to load balance + failover backup multiple vps webservers hosted on different providers. I heard that for HAProxy you need multiple server under the same subnet, plus a shared (virtual) ip address between load balancers. But it's not possible in my case cause every VPS is on different node/network. Is there a way to use HAProxy in this kind of setup ? ( Please explain how briefly, I don't want to hear your "YES" answer ) What about NginX? Is it possible to achieve same result with Nginx ? (when servers are located on different nets) I know about Round Rubin DNS, but it doesn't provide a real failover solution, neither a load balance between servers.

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• How to check if a server runs in pressing mode

  - by Ice

  Hi there, Layout: i have at customer side a server (win2003 R2 SP2 standard edition 32-bit) with a sql-server 2005 and some databases. This system starts with the /3GB-Switch. The system reports 3.25 GB RAM and taskmanager reports the process of sqlserver.exe with 2758255 K as the process with the highest consumption. The OS separates RAM for applications and for itself, normaly 50:50. But here we have the /3GB-Switch aktivated and i think the part for the applications is more than 50% of RAM. Knowledge (or better not knowledge): Somebody told me that if the OS runs out of memory within his part of RAM, the server runs into pressing mode. Questions: What is this pressing mode? Is pressing mode possible at all in this szenario? What should be done to get more performance out of this sql-server, beside optimizing the database and all this stuff.

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• Force Windows to cache executables without running them?

  - by Josh Einstein

  Is there a way to force Windows to pre-load certain EXE/DLL binaries into its prefetch/superfetch cache as if they had been executed? I have a particular application that loads pretty slowly on first run but if it's "warm" (recently executed) it starts pretty quickly. I'd like to prime the cache early in the background before the application is needed. But since it shows a UI, I'm looking for a way to do this silently. So simply launching the application it isn't ideal. Thanks you in advance. Prompted by David's suggestion in the comments, I wrote a PowerShell script to memory map the files, seek to the end, and close them. I haven't done any controlled tests yet and it could just be my imagination, but Sublime Text (the application in question) appeared to load much more quickly this time around and I haven't used it for several hours.

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• What can impact the throughput rate at tcp or Os level?

  - by Jimm

  I am facing a problem, where running the same application on different servers, yields unexpected performance results. For example, running the application on a particular faster server (faster cpu, more memory), with no load, yields slower performance than running on a less powerful server on the same network. I am suspecting that either OS or TCP is causing the slowness on the faster server. I cannot use IPerf , unless i modify it, because the "performance" in my application is defined as Component A sends a message to Component B. Component B sends an ACK to component A and ONLY then Component A would send the next message. So it is different from what IPerf does, which to my knowledge, simply tries to push as many messages as possible. Is there a tool that can look at OS and TCP configuration and suggest the cause of slowness?

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• Computer turns off and on after start ..then goes dead

  - by Shiki

  I built a new PC from the following components: - CPU: Intel Core i7 950 - MB: Gigabyte X58A-UD3R - RAM: 2x2gb i7 Corsair memory - VGA: Zotac AMP2 GTX260 - HDD: 1 GreenSATA HDD (Western Digital 500gb RE2) When I turn it on, it goes for a few seconds, fans at maximum speed, then turns off. The again, it starts by itself.. and goes with fans on max speed, nothing happens. First I suspected my PSU. It's a Chieftec 450AA PSU. After I borrowed a Chieftec 550AA PSU, I tried to start with that. Exact same story. Any idea ? Do I need a bigger PSU? Reason why its not localized. I never seen this turn on, off, on. If you give answer for that, it would already help people like me, with the same problem.

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• Problem opening password encrypted .docx file on Word 2003

  - by molecule

  Hi all, I am having a problem opening a .docx file on my Word 2003. I have installed the Compatibility pack for 2007 but when i try to open this particular file, I receive the error "Word experienced an error trying to open the file. Try these suggestions. 1. Check the file permissions for the document, 2. Make sure there is sufficient free memory and disk space, 3. Open the file with the Text Recovery converter. I do not think it is any of the errors as I am able to open it on a different PC with Word 2003 as well. I also do not have any issues opening any non-password encrypted .docx files. Has anyone experienced the same issue? Most posts on the internet relate to "open and repair" but as mentioned, I am able to open this file on another PC without any problems. Any advice is greatly appreciated. Thanks, George

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• Bios wont post unless I restart power supply.

  - by remy

  I have an annoying problem with a computer. The BIOS wont post after it has been turned off and started again unless I turn the switch off/on on the power supply. The fans, cdrom hdd and everything starts running but the bios never beeps and the monitor stays black. I HAVE TRIED: reinstalling windows xp, flashed bios to latest, cmos clear, new power supply, other hdd, new memory sticks, graphics card. I also removed the motherboard from the computer case and laid it on a cardboard box and only connected the PSU, RAM and CPU. Other than this the computer works great but its annoying having to off/on the power supply switch before turning it on after its been off. My guess is that the motherboard is faulty but I would just like to hear what you guys think. Sorry for my english / Remy

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• Converting an ancient RH8 system to VMware ESXi

  - by donatello

  I am curious to know what options I have to convert a very old RedHat8 machine to a virtual one on ESXi. Looking at VMware Converter it seems there's an option to login to the RH8 using SSH, and from there it will convert to the ESXi-server. That makes me a bit nervous though, exactly what is happening there? The RH8 machine is slightly critical, and if anything messes up it'll likely result in many hours extra work. :( Another option I thought of was to boot a LiveCD on RH8-system and create a raw "dd dump" of the disk. The similar method is used to restore the image, I boot a LiveCD on the VM in ESXi and use "dd" to write it to disk. Is there any other option I could use? I'm using the cheap version of ESXi, hence I have no access to the Converter BootCD so these rather cumbersome methods is the only I can think of. :)

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• apache2 Webdav using VirtualDocumentRoot

  - by picca

  I'm trying to get up dynamical WebDav on my virtual hosts <VirtualHost *:80> # http://www.example.com/test.txt -> /var/www/example.com/www/test.txt VirtualDocumentRoot /var/www/%-2.0.%-1.0/%-3+/ <Location /webdav> Dav On AuthType Basic AuthName "example.com" AuthUserFile /var/www/[PROBLEM-1]/passwd.dav Require valid-user </Location> </VirtualHost> Is there any way I can set dynamically PROBLEM-1 placeholder based on whatever comes with *HTTP_HOST*? More precisely part of it? Example: HTTP_HOST = www.example.com - PROBLEM-1 = example.com HTTP_HOST = example.com - PROBLEM-1 = example.com What I'm trying to do here is to load dav passwd file dynamically based on which domain is requested. It is something like "groups" if you wish. So that owner of domainA is not allowed to access files of domainB. So maybe there is some other solution based on AuthGroupFile directive?

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• JFFS2 poor mount performance

  - by Marcin Polkowski

  I run multiple ARM boards with Debian Linux installed. Board is equipped with 512 MB of NAND memory. I've observed that after ~3 months of continuous run booting time increased significantly - it takes over 3 minutes to mount filesystem (JFFS2). System was using about 35% of available storage so I’ve removed unnecessary files (got to ~18%) but this didn't change anything. Then I realized that my software produces directories that are left empty so I’ve removed ~500 empty and unnecessary dirs. This didn’t help either. After system is started I see JFFS2 garbage collector (jffs2_gcd_mtd4) running and occupying over 90% of CPU. Now my question: is there a way to „optimize” JFFS2 filesystem for better performance - faster booting (my system have limited timid to boot up)? It would be great if this optimization could be done remotely - I have no physical access to boards.

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