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• Linux EC2 Instance Security Consideration

  - by Amzath

  I am going to host a web site in Amazon EC2 instance which would be a Linux instance. My web application will be developed using PHP, Apache and MySql. As I am new to Linux and Amazon EC2 environment, what are key areas in security should I consider to protect my server? This may be very very generic question as the security itself a vast area. But I need to kick start with most imporant points. That way I would be able to track down all those areas one by one.

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• Linux EC2 Instance Security Consideration

  - by Amzath

  I am going to host a web site in Amazon EC2 instance which would be a Linux instance. My web application will be developed using PHP, Apache and MySql. As I am new to Linux and Amazon EC2 environment, what are key areas in security should I consider to protect my server? This may be very very generic question as the security itself a vast area. But I need to kick start with most imporant points. That way I would be able to track down all those areas one by one.

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• Case for Micro SD card?

  - by Josh

  I have a MicroSD card which I'd like to keep with me at all times, I.E. in my wallet. I'm looking for a case for it. But all the cases I can find seem to be for standard SD cards... the closest I could find was this: Which is completly pointless, it stores the Micro SD card along with it's adaptor. Why not just put the Micro SD card IN the adaptor and store both on a normal SD card case... Anyway, does what I'm looking for (a case to protect a microSD card, and only large enough for a mircoSD card, i.e. not what's pictured above) exist?

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• Send individual e-mails to each contact in Gmail?

  - by Robert C. Cartaino

  I'm trying to send an e-mail to a group of contacts in Gmail (200 recipients, no spam). Is there a way to force Gmail to send the e-mail as 200 individual e-mails, each addressed to that specific person in the list? But I'm trying to protect their privacy: Sending to a contact group puts all their e-mail addresses in the To: field. Adding their addresses to the cc: field means everyone can see all the addresses. Adding their addresses to the bcc: field means that no one sees their address (not even their own) in the to: field. That looks odd and seems like that would trigger a lot of spam filters. So how can I force Gmail to send the e-mail addressed specifically to each contact in the list?

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• Booting from a USB drive that was originally a boot drive

  - by daveh551

  When Win 7 went RTM, I upgraded my laptop from XP. But to protect myself against the possibility of having data inaccessible, I got a new disk and put it in the laptop, and took the old (XP) disk and put it in a USB enclosure. I have no trouble accessing the data on the USB drive under Windows 7. But I would like to be able to plug it in, tell the BIOS to boot from the USB drive, and be back on my old machine. The laptop is a Dell Precision M90, and it has a boot from USB option in its boot menu. But when I try to do that, it does read the drive, gets as far as putting up the Windows XP splash screen and starting the boot progress bar, and then reboots. What do I need to do to the old disk now running on USB to allow the machine to boot from it?

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• Bash command substitution not working as expected

  - by Joe Fruchey

  I'd like to view the last few lines of a file, but I want the columns aligned. Basically, I want to disable wordwrap. This is straightforward with: tail $FILE | cut -c -80 But I'm trying to generalize my script for other users, and I'd like to cut to the actual terminal width, which I can get with: stty size | cut -d" " -f2 So I would imagine that I could just tail $FILE | cut -c -`stty size | cut -d" " -f2` but it doesn't work: stty: standard input: Invalid argument cut: invalid range with no endpoint: - Try `cut --help' for more information. (Same results with the 'new' $() expansion.) Now, if I echo it, it seems fine: echo cut -c -`stty size | cut -d" " -f2` cut -c -103 Am I just missing an escape char? Or is this somehow just not possible? Thanks.

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• Power supply surges detected during previous power on

  - by Blastcore

  Message is this: "Power supply surges detected during previous power on" "ASUS Auto-Surge was triggered to protect system from unstable power supply" When i went to sleep yesterday and woke up, when i moved the mouse to go back from screen saver, it didn't do anything. So i left it, i came back from class and got this issue. (I didn't restart before going to class... So the screen was left like it was) Today there was a power cut in half of my house. (Computer is on the side that it didn't cut...) Voltages are fine, like always. How do i remove message? It's just maybe sensor glitch? Even disabling the Anti-Surge my PC "shuts down" (Only monitor, but maybe components do too.)

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• Recycle Bin for Windows Server 2003 File Shares

  - by Joseph Sturtevant

  One of the networks I administrate uses Windows Server 2003 File Shares to provide network storage for users. To prevent against accidental deletion, I use Shadow Copies to create snapshots twice a day. This method is only effective, however, for files which were on the share during the last snapshot. When users accidentally deleted files recently placed on the share, I have no recourse except to remote desktop into the server and attempt retrieval with an undelete utility (this is only effective if the file has not been overwritten). Is there a feature like the Windows Recycle Bin for Windows Server 2003 File Shares? What is the best way to protect my users against accidental file deletion in this scenario?

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• Why is autologon in Windows 7 a security risk

  - by Phenom

  If I set my Windows 7 account to automatically logon so I don't have to type a password, and I don't have to click my username on the logon screen, I heard it's a security risk. From Windows 7 Auto Login: Although I don’t personally recommend this, there are some people out there who don’t want to bother with using a password to protect their Windows user account. Of course, using a password in Windows isn’t required, only suggested. But even if you don’t fill one in, you still have to click your user icon to start the login process. An easier way - although again much less secure - is to enable auto-logins for your Windows PC. This is possible in Windows 7, as it was in prior versions, but it takes a little finagling to do so. (And for good reason, darn it.) What is risky about it besides people being able to logon locally? Does it make it easier for hackers to logon remoately?

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• Implementing a form of port knocking + Phone Factor = 2 Factor auth for RDP?

  - by jshin47

  I have been looking into how to secure a publicly-available RDP endpoint and want to implement our two-factor authentication RADIUS server, PhoneFactor. I would like to implement the following process: User opens up web app in browser In web app, user enters username + password, initiates RADIUS auth Phone factor calls user to complete auth Once user is authenticated, port 3389 is opened on user's IP on pfSense firewall. After some amount of time, firewall rule is removed for that IP I would like to know the following: Is this a typical setup? If it is a bad idea, please explain why. If it is possible, are there any packages that assist with this? Specifically, the third step, where the appropriate firewall rule would need to be added... Edit: I am aware of TS Web Gateway, but I want the users to be able to use the traditional RDP client...

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• Is there such thing as hardware encrypted raid disk?

  - by Dumitrescu Bogdan

  I have a server for which I want to protect the content. The server is located on a clients premises. Is there a way to encrypt the content of a RAID DISK (at hardware level) ? What I need is that the server will not be able to start as long as the required password is not provided (the encryption key) I will give the best answer to Miles, though the answer was not exactly to my question. But from all the comments, it seems that it cannot be done hardware or .. it cannot be done as I would like to.

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• VPN and Bonjour conflicting

  - by JW.

  Does anyone know why a VPN connection might interfere with Apple's Bonjour? I've noticed that my Mac and various iDevices have trouble finding each other on my local network, when I have VPN connections open. Things like Home Sharing and Wi-Fi Sync work some of the time, but sometimes fail to find the other device. The VPN connections are made using IPSecuritas, which is a GUI around raccoon. I have the local "endpoint mode" set to Host. Apple mentions that Home Sharing may conflict with VPNs, but they don't specify why, or how to fix it. I'm using a Mac with OS 10.7.3 and IPSecuritas to connect to the VPN, an iPhone, and an iPad.

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• Mount /tmp in /mnt on EC2

  - by Claudio Poli

  I was wondering what is the best way to mount the /tmp endpoint in the ephemeral storage /mnt on an EC2 instance and give the ubuntu user default write permissions. Some suggest editing /etc/rc.local this way: mkdir -p /mnt/tmp && mount --bind -o nobootwait /mnt/tmp /tmp However that doesn't work for me. I tried editing the fstab: /dev/xvdb /tmp auto defaults,nobootwait,comment=cloudconfig 0 2 and giving it a umask=0777, however it doesn't work because of cloudconfig. I'm using Ubuntu 12.04.

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• PCRE limits exceeded, but triggering rules are SQL related

  - by Wolfe

  [Mon Oct 15 17:12:13 2012] [error] [client xx.xx.xx.xx] ModSecurity: Rule 1d4ad30 [id "300014"][file "/usr/local/apache/conf/modsec2.user.conf"][line "349"] - Execution error - PCRE limits exceeded (-8): (null). [hostname "domain.com"] [uri "/admin.php"] [unique_id "UHx8LEUQwYEAAGutKkUAAAEQ"] And similar are spamming my error log for apache. It's only the admin side.. and only these two lines in the config: line 349: #Generic SQL sigs SecRule ARGS "(or.+1[[:space:]]*=[[:space:]]1|(or 1=1|'.+)--')" "id:300014,rev:1,severity:2,msg:'Generic SQL injection protection'" And line 356: SecRule ARGS "(insert[[:space:]]+into.+values|select.*from.+[a-z|A-Z|0-9]|select.+from|bulk[[:space:]]+insert|union.+select|convert.+\(.*from)" Is there a way to fix this problem? Can someone explain what is going on or if these rules are even valid to cause this error? I know it's supposedly a recursion protection.. but these protect against SQL injection so I'm confused.

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• How to avoid damage to ISO archives?

  - by TMRW

  So had a problem where a 16GB ISO was damaged(likely my own fault using standard windows copy dialog instead of proper copy tool like robocopy with verification turned on). It took several hours but i managed to restore the ISO(basicly i rebuilt the damaged parts and recompiled).Namely some .rar archives inside it were unreadable but the ISO itself was readable. So im wondering how can i further protect something like this from happening again?.Obviously proper copy tool but mayble something else?.Perhaps set as "read only" could help?.I generally don't move these files a lot and if i need to acces them then it's only for opening/extracting.

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• Why would a terminal server be kicking users off after about 5 minutes?

  - by Matt

  I have a terminal server that was restored from an old 1U server to an IBM HS20 Blade running ESXi. The restore was using shadow protect hardware independent restore. All appeared to be functioning well but we're finding that users are being periodically kicked off after around 5 minutes or so. The interesting thing is it doesn't appear to be a simple disconnect but the whole session has gone like it was logged out. There is nothing significant in the event log, and certainly nothing from terminal services that is logged. I've also checked the client computers and from the client computers logged into our other terminal server and there wasn't any issues there. It doesn't appear to be network related. Any ideas?

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• How to discharge static electricity before opening a computer?

  - by Pekka

  Before opening a computer, I often hear advice to touch something that is "grounded" - a computer case for example, or a heating element - to avoid damaging the sensitive electronic equipment through static discharge. What exactly is true here, and what are the do's and don'ts. Touching what objects will actually work, and what won't? If I touch a computer case, does it matter what it stands on, and whether it is connected to an outlet? What other ways are there to protect the equipment from a static discharge than touching something grounded? Are there common pieces of clothing that I shouldn't be wearing when working inside a computer, for example a woollen pullover? There is a lot on Google, but there seem to be many contradictions and misconceptions out there, so I think this is a question worth having here.

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• Automatically encrypting incoming email

  - by user16067

  I have a small website and would like to encrypt incoming email using gpg. Is there a way to force sendmail to check email and encrypt it if its not already encrypted? I'm using GPG on a linux server. Thanks [added]Someone asked what I hope to accomplish. My intent is for the users of the email to become more familiar with seeing thier own email encrypted and losing that fear of the unknown. The side benefit is that the email can't be looked at later down the road. If the email isn't encrypted on its way in, I'm unable to do anything about it. I'm assuming most email would be nosed around with once its already on my hard drive, so GPG would protect against those issues.

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• Trucrypt or any HDD encryption solution with a bypass?

  - by sorrrydoctorforlove

  Hello experts, in my environment here we have started using trucrypt to encrypt and protect our laptops that are being brought out of the office. The issue comes with the password, we can document the passwords and assign them to users but if they simply use the program to change the password, and then forget it we are in trouble. We backup our data to external locations so it should be fine, but is there any way to install a bypass to be able to boot the laptop or stpo users changing their password (while they have local admin access)? Or should we try another solution? thanks.

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• Mikrotik server networks and Cain & Abel

  - by user269742

  I'm connected to the internet via a mikrotik server network. Recently, I read about that scaring application named Cain & Abel and all the capabilities it offered for malicious users. I don't know if anyone on my network is using or even aware of such application but my questions are: 1- How to protect myself from this program? 2- How to know if someone using such application against me? 3- Is Tor Bundle capable of protecting me from Cain & Abel? 4- If I filled my e-mail password via SSL page, Can Cain & Abel collect it? 5- Is it safe to use SKYPE or Yahoo Messenger voice chat if some one using Cain & Abel on my network?

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• media is write protected when using diskshadow.exe, start-bitstransfer powershell cmdlet

  - by Aaron - Solution Evangelist

  i am trying to use the powershell start-bitstransfer cmdlets to transfer a file i have exposed using a vss snapshot (via diskshadow), but unfortunately i am receiving the following error: Start-BitsTransfer : The media is write protected. At line:1 char:49 + Import-CSV c:\hda1\bits.txt | start-bitstransfer <<<< -transfertype upload -Authentication "Basic" -Credential $cred + CategoryInfo : InvalidOperation: (:) [Start-BitsTransfer], Exception + FullyQualifiedErrorId : StartBitsTransferCOMException,Microsoft.BackgroundIntelligentTransfer.Management.NewBits TransferCommand we really want to utilize the bits endpoint we are attempting to transfer the files to. is there any other way we can go about this (aside from copying the files elsewhere first, unless we can copy one slice at a time and transfer that)?

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• Virus - Isn' t there any online solution ?

  - by Sarang

  In our daily life, we come across various Viruses. In this internet world, we do have lots of type of viruses come to visit us ! A programmer can create a Virus using programming & it can be put on internet. It flows across the world & harm all the system. Don't do we have a same way to run an Anti-virus that flows across the internet & can protect the network from being affected by Viruses ? Please give any Idea...

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• Securing a local server physically

  - by Daniele

  We are an online business. We have a very powerful server with hard disk mirroring in our office that we are using for a variety of internal business-critical functions. We want to keep that machine in our office but we want to make sure it is as secure as possible (within reason). Obviously we are already backing it up everyday off-site. My question is more about not-too-expensive physical measures to protect the machine against thieves and disasters such as fire. What would you suggest?

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• How can I restrict SSH access when the source IP is dynamic

  - by Supratik

  Hi I want to protect SSH access to our live web server from all IP's except our office static IP. There are some employees who connects to this live server from their dynamic IP's. So, it is not always possible for me to change in the iptables rule in live server whenever the dynamic IP of the employee changes. I tried to put them in office VPN and allowed only SSH access from office IP but the office connection is slow in compared to our employee's private internet connection, moreover it adds an extra overhead to our office network. Is there any way I can solve this problem ?

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• Firewalling a Cisco ASA Split tunnel

  - by dunxd

  I have a Cisco ASA 5510 at head office, and Cisco ASA 5505 in remote offices. The remote offices are connected over a split tunnelled VPN - the ASA 5505s use "Easy VPN" Client type VPN in Network Extension Mode (NEM). I'd like to set firewall rules for the non-tunnelled traffic only. Traffic over the VPN to head office should not have any firewall rules applied. I might want to apply different firewall rules to different remote offices. All the documentation I have been able to find assumes the Client VPN is a software endpoint, and all the configuration is done at the 5510. When using a Cisco 5505 as the VPN client, is it possible to configure any firewalling at the Client end, or does it all have to come from the 5510? Are there any other issues to look out for when split-tunnelling a VPN by this method?

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